Power assembly and preparation method thereof, power module and equipment comprising power module

Abstract

The invention discloses a power assembly and a preparation method thereof, a power module and equipment comprising the power module, and relates to the field of vehicle motor control equipment, and the power assembly comprises the power module and a capacitor assembly which are stacked; the capacitor assembly is connected with a first terminal and a second terminal which are insulated from each other; the first terminal and the second terminal are oppositely arranged; the power module comprises a plurality of sub power modules; the sub power module is connected with a third terminal and a fourth terminal which are insulated from each other, and the third terminal and the fourth terminal are oppositely arranged; at least two sub power modules are connected with the same third terminal and the same fourth terminal; the first terminal is connected with the third terminal, and the second terminal is connected with the fourth terminal. The laminated relative area of the terminals can be increased, and the series inductance can be reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle motor control equipment, and particularly to a power component, a preparation method thereof, a power module, and a device including the power module. Background Art

[0002] With the continuous development of science and technology, more and more vehicles are widely used in people's daily lives and work, bringing great convenience to people's daily lives and work and becoming an indispensable important tool for people today. Among them, the power component is one of the important components in the vehicle. The core component of the electronic control assembly is the power component, and the power component includes a capacitor component and a power module.

[0003] In a conventional power component, there is a large series inductance (Equivalent Series Inductance, abbreviated as ESL) in the connection structure between the DC terminals of the power module and the DC terminals of the capacitor component, which affects the performance of the power component. Summary of the Invention

[0004] In view of the above problems, this application provides a power component, a preparation method thereof, a power module, and a device including the power module to at least achieve the purpose of reducing the series inductance. The specific solutions are as follows:

[0005] In a first aspect of this application, a power component is provided, including:

[0006] A power module and a capacitor component stacked;

[0007] The capacitor component is connected with a first terminal and a second terminal that are insulated from each other; the first terminal and the second terminal are oppositely arranged;

[0008] The power module includes a plurality of sub-power modules; the sub-power modules are connected with a third terminal and a fourth terminal that are insulated from each other, the third terminal and the fourth terminal are oppositely arranged; at least two sub-power modules are connected to the same third terminal and the same fourth terminal;

[0009] The first terminal is connected to the third terminal, and the second terminal is connected to the fourth terminal.

[0010] Optionally, in the above power component, the surface of the capacitor component facing the power module is connected with the first terminal and the second terminal; the first terminal and the second terminal are oppositely arranged in a first direction;

[0011] The same end of the power module is connected with the third terminal and the fourth terminal; the end faces the first terminal and the second terminal; the third terminal includes a first section terminal connected to the end, and the fourth terminal includes a second section terminal connected to the end; the first section terminal and the second section terminal are parallel to the first direction and are oppositely arranged in a second direction;

[0012] Wherein, the second direction is parallel to the stacking direction of the power module and the capacitor component, and the first direction is perpendicular to the second direction; the first terminal and the third terminal are connected, and the second terminal and the fourth terminal are connected.

[0013] Optionally, in the above power component, the perpendicular projections of the first terminal and the second terminal on the first plane at least partially overlap; the first plane is perpendicular to the first direction;

[0014] And / or, the perpendicular projections of the third terminal and the fourth terminal on the second plane at least partially overlap; the second plane is perpendicular to the second direction.

[0015] Optionally, in the above power component, the edges of the first terminal and the second terminal on both sides of the second direction satisfy the flush condition;

[0016] And / or, the edges of the third terminal and the fourth terminal on both sides of the first direction satisfy the alignment condition.

[0017] Optionally, in the above power component, the misalignment distance between the opposite edges of the first terminal and the second terminal does not exceed 0.2 mm;

[0018] The misalignment distance between the opposite edges of the third terminal and the fourth terminal does not exceed 0.2 mm.

[0019] Optionally, in the above power component, the fourth terminal is located between the third terminal and the capacitor component;

[0020] The second terminal is located between the first terminal and the end portion.

[0021] Optionally, in the above power component, the fourth terminal further includes a third segment terminal connected to the second segment terminal; the third segment terminal is parallel to the second direction and extends toward the capacitor component;

[0022] Wherein, the third segment terminal and the second terminal have a first overlapping area in the first direction, and the third segment terminal and the second terminal are connected in the first overlapping area.

[0023] Optionally, in the above power component, the third terminal and the first terminal are connected through an adapter terminal.

[0024] Optionally, in the above power component, in the first direction, there is a gap exposing the first overlapping area between the third terminal and the first terminal, and the adapter terminal covers the gap.

[0025] Optionally, in the above power component, the adapter terminal and the first terminal have a second overlapping area in the first direction, and the adapter terminal and the first terminal are connected in the second overlapping area;

[0026] The adapter terminal and the third terminal have a third overlapping region, and the adapter terminal and the third terminal are connected in the third overlapping region.

[0027] Optionally, in the above power component, the first overlapping region and the second overlapping region do not overlap in the first direction.

[0028] Optionally, in the above power component, in the second direction, the distance between the first overlapping region and the capacitor component is greater than the distance between the second overlapping region and the capacitor component.

[0029] Optionally, in the above power component, the adapter terminal and the first section terminal have a third overlapping region in the second direction.

[0030] Optionally, in the above power component, the third terminal further includes a fourth section terminal connected to the first section terminal; the fourth section terminal is parallel to the second direction and extends away from the capacitor component;

[0031] The adapter terminal and the fourth section terminal have a third overlapping region in the first direction.

[0032] Optionally, in the above power component, the third terminal further includes a fourth section terminal connected to the first section terminal; the fourth section terminal is parallel to the second direction and extends toward the capacitor component;

[0033] The adapter terminal and the fourth section terminal have a third overlapping region in the first direction.

[0034] Optionally, in the above power component, in the second direction, the distance between the third overlapping region and the capacitor component is greater than the distance between the first overlapping region and the capacitor component; and the distance between the second overlapping region and the capacitor component is less than the distance between the first overlapping region and the capacitor component.

[0035] Optionally, in the above power component, the fourth terminal further includes a third section terminal connected to the second section terminal; the third terminal further includes a fourth section terminal connected to the first section terminal; both the third section terminal and the fourth section terminal extend away from the capacitor component;

[0036] The fourth section terminal and the first terminal are connected at one end away from the capacitor component to form a first connection region; the third section terminal and the second terminal are connected at one end away from the capacitor component to form a second connection region; in the second direction, the distance between the second connection region and the capacitor component is less than the distance between the first connection region and the capacitor component.

[0037] Optionally, in the above power component, the fourth section terminal and the first terminal have a relative portion in the first direction;

[0038] The third section terminal and the second terminal have a first overlapping area in the first direction; the first overlapping area includes an end of the second connection area located in the accommodation space formed by the opposite parts.

[0039] Optionally, in the above power component, in the relative portion, the fourth section terminal and the first terminal both protrude toward a side away from the first overlapping area to form an accommodation space.

[0040] Optionally, in the above power component, in the first direction, the third terminal exposes at least a portion of the third terminal segment.

[0041] Optionally, in the above power assembly, an insulating member is provided between the first terminal and the second terminal;

[0042] And / or, an insulating member is provided between the third terminal and the fourth terminal.

[0043] Optionally, in the above power component, the first terminal and the third terminal are fixedly connected by welding, and the second terminal and the fourth terminal are fixedly connected by welding.

[0044] Optionally, in the above power component, at least one of the first terminal, the second terminal, the third terminal and the fourth terminal has a thickness of 1 mm to 2 mm.

[0045] Optionally, in the above power component, the distance between the first terminal and the second terminal is 1.5 mm to 2 mm;

[0046] And / or, the distance between the third terminal and the fourth terminal is 1.5 mm to 2 mm.

[0047] Optionally, in the above power assembly, the first section terminal includes an integrated first part and a second part, the first part is connected to the end, and the second part is located on a side of the first part away from the end;

[0048] wherein the width of the first portion is smaller than the width of the second portion;

[0049] Alternatively, the width of the first portion is equal to the width of the second portion.

[0050] Optionally, in the above power component, the first terminal and the second terminal both include an integrated third part and a fourth part; in the same terminal, the fourth part is connected to the surface, and the third part is located on a side of the fourth part away from the surface;

[0051] wherein the width of the third portion is smaller than the width of the fourth portion;

[0052] Alternatively, the width of the third portion is equal to the width of the fourth portion.

[0053] Optionally, in the above power component, the first-stage terminal includes an integrated first part and a second part. The first part is connected to the end, and the second part is located on the side of the first part away from the end;

[0054] Both the first terminal and the second terminal include an integrated third part and a fourth part; in the same terminal, the fourth part is connected to the surface, and the third part is located on the side of the fourth part away from the surface;

[0055] Wherein, the width of the first part is less than the width of the second part, the width of the second part is equal to the width of the third part, and the width of the third part is less than the width of the fourth part.

[0056] Optionally, in the above power component, the power component includes at least one of a drive control module and a power generation control module; the drive control module is used to connect to a drive motor; the power generation control module is used to connect to a power generation motor;

[0057] Wherein, both the drive control module and the power generation control module include a power module and a capacitor component arranged in a stacked manner.

[0058] Optionally, in the above power component, the power component includes both a drive control module and a power generation control module;

[0059] Wherein, the drive control module and the power generation control module share the same capacitor component.

[0060] Optionally, in the above power component, the first terminal and the third terminal are connected based on an adapter terminal;

[0061] The power generation control module and the drive control module share the same adapter terminal.

[0062] Optionally, in the above power component, the sub-power module in the drive control module is a first sub-power module. The drive control module includes a plurality of first sub-power modules, and the first sub-power modules each have an independent liner;

[0063] The sub-power module in the power generation control module is a second sub-power module. The power generation control module includes a plurality of second sub-power modules, and the second sub-power modules share the same liner.

[0064] Optionally, in the above power component, the drive control module includes three first sub-power modules; the power generation control module includes three second sub-power modules.

[0065] Optionally, in the above power component, the sub-power module in the drive control module is a first sub-power module. The drive control module includes a plurality of first sub-power modules, and the first sub-power modules are connected to the same third terminal and the same fourth terminal;

[0066] The sub - power module in the power generation control module is the second sub - power module. The power generation control module includes a plurality of second sub - power modules, and the second sub - power modules are connected to the same third terminal and the same fourth terminal;

[0067] If the power component includes both a drive control module and a power generation control module, the first sub - power module and the second sub - power module are respectively connected to different third terminals and different fourth terminals.

[0068] The second aspect of this application provides a preparation method for the above - mentioned power component, including:

[0069] Stack the power module and the capacitor component; the capacitor component is connected with a first terminal and a second terminal that are insulated from each other; the first terminal and the second terminal are arranged opposite to each other; the power module includes a plurality of sub - power modules; the sub - power module is connected with a third terminal and a fourth terminal that are insulated from each other, and the third terminal and the fourth terminal are arranged opposite to each other; at least two sub - power modules are connected to the same third terminal and the same fourth terminal;

[0070] Connect the first terminal and the third terminal, and connect the second terminal and the fourth terminal.

[0071] Optionally, in the above - mentioned preparation method, connecting the first terminal and the third terminal, and connecting the second terminal and the fourth terminal includes:

[0072] After connecting the end of the second terminal far from the capacitor component and the end of the fourth terminal far from the power module, connect the end of the first terminal far from the capacitor component and the end of the third terminal far from the power module;

[0073] Or, after connecting the second terminal and the fourth terminal in the first overlapping area, connect the first terminal and the third terminal using an adapter terminal.

[0074] Optionally, in the above - mentioned preparation method, the first terminal and the second terminal are connected to the surface of the capacitor component facing the power module; the first terminal and the second terminal are arranged opposite to each other in the first direction; the same end of the power module is connected with the third terminal and the fourth terminal; the end faces the first terminal and the second terminal; the third terminal includes a first - segment terminal connected to the end, and the fourth terminal includes a second - segment terminal connected to the end; the first - segment terminal and the second - segment terminal are parallel to the first direction and are arranged opposite to each other in the second direction; the second direction is parallel to the stacking direction of the power module and the capacitor component, and the first direction is perpendicular to the second direction; the first terminal and the third terminal are connected, and the second terminal and the fourth terminal are connected;

[0075] The fourth terminal further includes a third segment terminal connected to the second segment terminal; the third terminal further includes a fourth segment terminal connected to the first segment terminal; both the third segment terminal and the fourth segment terminal extend away from the capacitor assembly; the first terminal includes a fifth segment terminal and a sixth segment terminal, the fifth segment terminal is vertically connected to the surface; the sixth segment terminal is connected to one end of the fifth segment terminal away from the capacitor assembly;

[0076] A method for connecting the terminals of the capacitor assembly and the power module includes:

[0077] The sixth segment terminal is bent outward, forming an angle a with the first direction; the fourth terminal is bent inward, forming an angle b with the first terminal; both a and b are less than 90°; based on the welding window formed by a and b, the second terminal and the fourth terminal are welded and fixedly connected;

[0078] After increasing a and b, the end of the fourth segment terminal away from the first segment terminal and the end of the sixth segment terminal away from the fifth segment terminal are relatively contacted and welded and fixed.

[0079] Optionally, in the above preparation method, before welding the second terminal and the fourth terminal, the values of a and b are 70° to 80°.

[0080] The third aspect of the present application provides a power module, including:

[0081] A plurality of sub-power modules, the sub-power modules are connected with relatively insulated third terminals and fourth terminals;

[0082] The third terminal and the fourth terminal are oppositely arranged;

[0083] At least two sub-power modules are connected to the same third terminal and the same fourth terminal.

[0084] Optionally, in the above power module, the same end of the power module is connected with a third terminal and a fourth terminal;

[0085] The third terminal includes a first segment terminal connected to the end, the fourth terminal includes a second segment terminal connected to the end; the first segment terminal and the second segment terminal are parallel to the first direction and are oppositely arranged in the second direction;

[0086] Wherein, the second direction is perpendicular to the plane where the power module is located, and the first direction is perpendicular to the second direction.

[0087] Optionally, in the above power module, the fourth terminal further includes a third segment terminal connected to the second segment terminal; the third terminal further includes a fourth segment terminal connected to the first segment terminal; both the third segment terminal and the fourth segment terminal extend along the second direction;

[0088] The third - stage terminal and the fourth - stage terminal are bent towards the same side and are oppositely arranged in the first direction; or, the third - stage terminal and the fourth - stage terminal are bent in opposite directions.

[0089] Optionally, in the above - mentioned power module, at least two sub - power modules share the same substrate.

[0090] Optionally, in the above - mentioned power module, at least two sub - power modules respectively have separate substrates.

[0091] Optionally, in the above - mentioned power module, at least two sub - power modules share the same substrate;

[0092] At least two sub - power modules respectively have separate substrates.

[0093] The fourth aspect of the present application provides a motor controller, including the above - mentioned power component.

[0094] The fifth aspect of the present application provides an electric control assembly, including the above - mentioned motor controller.

[0095] The sixth aspect of the present application provides a vehicle, including the above - mentioned electric control assembly.

[0096] By means of the above - mentioned technical solutions, in the technical solutions of the present application, the first terminal and the second terminal are arranged in a stacked and opposite manner, and the third terminal and the fourth terminal are arranged in a stacked and opposite manner, which can increase the stacked relative area between the terminals. Setting multiple sub - power modules to share the third terminal and the fourth terminal can further increase the stacked relative area between the terminals and can reduce the series inductance.

[0097] Optionally, between the first terminal and the third terminal, and between the second terminal and the fourth terminal, they can be fixedly connected by welding respectively, which can make the contact resistance between the two mutually - welded terminals lower, reduce the thermal risk, and the vibration resistance of each terminal is stronger. When the power component experiences large vibrations or is used for a long time, the connection position between the terminals will not become loose, thus avoiding the problem of increased contact resistance caused by poor contact between the terminals and reducing the risk problem caused by abnormal temperature of the power component.

[0098] Furthermore, if the terminals are fixedly connected by welding, compared with the conventional connection scheme of fixing the terminals by screws, in the technical solutions of the present application, the terminals are fixed by welding, without the need to separately set the space required for screws, which can greatly simplify the assembly process, improve the assembly efficiency, reduce the volume of the power component, and reduce the material cost. Description of the Drawings

[0099] To more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0100] The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the conditions under which the present application can be implemented. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present application can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present application.

[0101] Figure 1 It is a three-dimensional view of the layout of two copper bars that are parallel to each other and connected in series.

[0102] Figure 2 is Figure 1 front view of

[0103] Figure 3 It is a three-dimensional view of a power component.

[0104] Figure 4 is Figure 3 top view of

[0105] Figure 5 is Figure 3 partial enlarged view of

[0106] Figure 6 It is a top view of the connection structure between a sub-power module and a capacitor component in a power component.

[0107] Figure 7 is Figure 6 side view of the structure shown in

[0108] Figure 8 is Figure 6 right view of the structure shown in

[0109] Figure 9 It is a side view of a power component provided by an embodiment of the present application.

[0110] Figure 10 is Figure 9 top view of the power module in the power component shown in

[0111] Figure 11 It is a three-dimensional view of a power component provided by an embodiment of the present application.

[0112] Figure 12 is Figure 11 a three-dimensional view of the power module in the power component shown;

[0113] Figure 13 a three-dimensional view of the power module in a power component;

[0114] Figure 14 a three-dimensional view of another power component provided by an embodiment of the present application;

[0115] Figure 15 is Figure 14 a three-dimensional view of the power module in the power component shown;

[0116] Figure 16 a three-dimensional view of a power component provided by an embodiment of the present application;

[0117] Figure 17 a partial side view of the terminal connection structure of the power module and the capacitor component in a power component provided by an embodiment of the present application;

[0118] Figure 18 is Figure 17 a top view of the power component shown;

[0119] Figure 19 is Figure 17 a right view of the power component shown before connecting the adapter terminal;

[0120] Figure 20 is Figure 17 a right view of the power component shown after connecting the adapter terminal;

[0121] Figure 21 a side view of the terminal connection structure of the power module and the capacitor component in a power component provided by an embodiment of the present application;

[0122] Figure 22 a side view of the terminal connection structure of the power module and the capacitor component in another power component provided by an embodiment of the present application;

[0123] Figure 23 a side view of the terminal connection structure of the power module and the capacitor component in yet another power component provided by an embodiment of the present application;

[0124] Figure 24 a schematic flow chart of a method for manufacturing a power component provided by an embodiment of the present application;

[0125] Figure 25 and Figure 26 a schematic diagram of the principle of a terminal connection method provided by an embodiment of the present application;

[0126] Figure 27 A schematic diagram of the terminal structure of a capacitor assembly before being connected and assembled with a power module;

[0127] Figure 28 A schematic diagram of the terminal structure of another capacitor assembly before being connected and assembled with a power module;

[0128] Figure 29 A topological structure diagram of an extended-range new energy vehicle provided in an embodiment of the present application;

[0129] Figure 30 An equivalent circuit diagram of a power component provided in an embodiment of the present application.

[0130] Reference numerals:

[0131] 1-power module; 2-capacitor assembly; 3-surface; 4-end; 5-insulator; 6-lining; 7-sub-power module; 70-pin; 8-screw; 9-AC terminal; 10-calibration tooling; 11-electric drive unit; 12-drive motor; 13-inverter; 14-power battery; 15-power generation assembly; 16-generator motor; 17-engine; 18-range extender; 19-heat sink; 101-drive control module; 102-power generation control module; 701-first sub-power module; 702-second sub-power module; 801-first copper busbar; 802-second copper busbar; 901-upper bridge arm circuit; 902-lower bridge arm circuit; 903-positive busbar; 904- Negative busbar; 905-first power chip; 906-second power chip; X-first direction; Y-second direction; Z-third direction; T1-first terminal; T2-second terminal; T3-third terminal; T4-fourth terminal; T5-transfer terminal; T01-first section terminal; T02-second section terminal; T03-third section terminal; T04-fourth section terminal; T05-fifth section terminal; T06-sixth section terminal; A1-first overlapping area; A2-second overlapping area; A3-third overlapping area; B1-first connection area; B2-second connection area; C-opposite part; D1-first area; D2-second area; D3-third area; D4-fourth area. DETAILED DESCRIPTION

[0132] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the embodiments of the present application. It is known to those skilled in the art that with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0133] The power component can be used to control the operating state of the motor in the vehicle, and the motor is generally a three-phase motor. When the power component performs high-speed on / off control on the power module, the surge voltage V is loaded onto the current loop where the power module is located. V is proportional to the magnitude of the series inductance Ls introduced by the terminals in the current loop. The calculation formula for the surge voltage is as follows:

[0134] (1)

[0135] Wherein, is the rate of change of the current in the current loop.

[0136] Reference Figure 1 and Figure 2 , Figure 1 is a three-dimensional view of the layout of two copper bars that are parallel to each other and connected in series, Figure 2 is Figure 1 front view. Figure 1 The bold one-way arrow in indicates the direction of the current flow in the current loop. In the embodiments of the present application, each terminal is not limited to a copper bar and may also be a structural member made of other metal materials.

[0137] Such as Figure 1 and Figure 2 shown, the first copper bar 801 and the second copper bar 802 are two parallel and series-connected DC terminals in the power component. For example, the first copper bar 801 and the second copper bar 802 can be the positive terminal and the negative terminal of the power module in sequence, or the positive terminal and the negative terminal of the capacitor component. It is set that the widths of the first copper bar 801 and the second copper bar 802 are both W, the lengths are both L, the thicknesses are both t, and the distance between them is d.

[0138] For Figure 1 and Figure 2 shown copper bar arrangement, the empirical calculation formula of Ls of the two copper bars in the current loop is:

[0139] (2)

[0140] Wherein, L1 and L2 respectively represent the self-inductance of the two copper bars; M represents the mutual inductance between the two copper bars; k represents the coupling coefficient, and k can characterize the coupling degree between the two copper bars. When the centers of the two copper bars are not aligned, it will affect the value of k. If WS:W≠1, then k<1. The smaller the value of WS:W, the greater the degree of misalignment of the centers of the two copper bars and the smaller the value of k. WS is the overlapping width of the two copper bars.

[0141] Based on formula (2), the formula for Ls can be expressed as:

[0142] (3)

[0143] Wherein, is the magnetic permeability in vacuum.

[0144] Based on Formulas (1) and (3), it can be known that the smaller L is, the larger W is, the larger t is, then the smaller Ls is, and the smaller V is; WS: the larger W is, the larger the overlapping ratio of the two terminals is, then the larger k is, the smaller Ls is, and the smaller the surge voltage is.

[0145] Reference Figures 3 - 5 , Figure 3 is a three-dimensional view of a power component, Figure 4 is Figure 3 the top view of Figure 5 is Figure 3 the partial enlarged view of . In this way, the power component includes a power module 1 and a capacitor component 2 arranged in a stacked manner. The shown power component is a double-electronic control structure, and the power module 1 includes: a drive control module 101 and a power generation control module 102.

[0146] The drive control module 101 and the power generation control module 102 can be fixed on the surface of the heat dissipation plate 19, and the capacitor component 2 is located below the heat dissipation plate 19.

[0147] The drive control module 101 is the core device that converts direct current into alternating current and is used to connect the drive motor. The power generation control module 102 is the core device that can convert alternating current into direct current and is used to connect the power generation motor. The drive motor and the power generation motor can both be three-phase motors. The drive control module 101 and the power generation control module 102 are arranged coplanarly on the surface of the capacitor component 2, which can reduce the occupied space size of the product. Among them, the capacitor component 2 can be used in combination with the power module 1 in the power component and is the key part for balancing the DC side bus voltage.

[0148] As Figures 3 - 5 shown, the capacitor component 2 includes a first terminal T1 and a second terminal T2. Among the first terminal T1 and the second terminal T2, one is the positive terminal and the other is the negative terminal. The power module 1 includes a third terminal T3 and a fourth terminal T4. Among the third terminal T3 and the fourth terminal T4, one is the positive terminal and the other is the negative terminal. The first terminal T1 and the third terminal T3 are connected and fixed by a screw 8, and the second terminal T2 and the fourth terminal T4 are connected and fixed by a screw 8, so that the positive terminals of the capacitor component 2 and the power module 1 are connected, and the negative terminals of the two are connected. Among them, the positive terminal is used to connect the positive pole of the vehicle power battery through the positive DC bus, and the negative terminal is used to connect the negative pole of the vehicle power battery through the negative DC bus.

[0149] If the motor is a three-phase motor, the drive control module 101 and the power generation control module 102 may each include three sub-power modules. In the same control module, the three sub-power modules can be connected to the three-phase AC terminals of the three-phase motor in a one-to-one correspondence. The connection structure between the sub-power module in the power module 1 and the capacitor component 2 is as follows: Figures 6 - 8 shown.

[0150] refer to Figures 6 - 8 , Figure 6 A top view of a connection structure between a sub-power module and a capacitor component in a power component. Figure 7 for Figure 6 A side view of the structure shown, Figure 8 for Figure 6 The terminal connection path between the sub-power module and the capacitor assembly 2 includes four regions, which are the first region D1, the second region D2, the third region D3 and the fourth region D4.

[0151] Combination Figures 3 - 8 As shown, in the sub-power module, the third terminal T3 and the fourth terminal T4 are respectively led out from the liner 6 of the sub-power module; the third terminal T3 and the fourth terminal T4 are stacked and overlapped in the first area D1, and the width is W1; in the second area D2, the third terminal T3 and the fourth terminal T4 are respectively connected to the first terminal T1 and the second terminal T2 by screws 8, and the two are in Figure 6 In the capacitor assembly 2, the first terminal T1 and the second terminal T2 are also arranged in parallel in the second region D2, with widths of W2- and W2+ respectively; the first terminal T1 and the second terminal T2 are arranged in parallel in the third region D3, with widths of W3- and W3+ respectively; the first terminal T1 and the second terminal T2 are arranged in parallel in the fourth region D4, with widths of W4.

[0152] The sub-power module includes a half-bridge circuit located on the liner 6, and the half-bridge circuit includes a power chip. Due to the limitations of factors such as chip size and quantity and the size of the liner 6, each sub-power module needs to use a separate liner 6, resulting in larger sizes of b1 and b2. The width of the single-phase sub-power module in the drive control module 101 is b1, and the width of the drive control module 101 is b01. The width of the single-phase sub-power module in the power generation control module 102 is b2, and the width of the power generation control module 102 is b02. In order to meet the terminal connection relationship between the power module 1 and the capacitor component 2 in the dual electric control structure, the six sub-power modules in the drive control module 101 and the power generation control module 102 have positive and negative terminals respectively, and a total of 6 positive terminals and 6 negative terminals are required, resulting in larger overall sizes of the two control modules b01 and b02, which in turn leads to a larger ESL of the power component and high material cost.

[0153] In addition, the first region D1 to the fourth region D4 are important regions affecting the ESL of the current loop where the power module 1 and the capacitor component 2 are located. In the first region D1, the width W1 of the terminal is relatively large and they are stacked vertically, and the ESL in this region is relatively small. In the second region D2, in order to satisfy the connection of the positive terminals of the power module 1 and the capacitor component 2 through the screw 8 and the connection of the negative terminals through the screw 8, the widths W2- and W2+ of the terminals are relatively small, and there is no overlapping region between the positive and negative terminals (WS = 0 in this region). Based on formula (3), the ESL between the positive and negative terminals is relatively large. Similarly, in the third region D3, the widths W3- and W3+ of the terminals are also limited, and there is no overlapping region between the positive and negative terminals (WS = 0 in this region). Based on formula (3), the ESL between the positive and negative terminals is relatively large.

[0154] Since the terminals between the capacitor component 2 and the power module 1 need to be fixed by the screw 8, the screw fixing scheme has at least the following deficiencies: The materials of the traditional screw scheme increase, which increases the process complexity in the storage, feeding, and fastening of the screws; during automatic feeding, due to the influence of screw consistency or other factors, failures such as jamming of the screws may occur accidentally, requiring manual intervention, reducing the degree of automation and affecting the production rhythm; the screw fixing and assembly time is long and the efficiency is low. For applications with a large number of screws, in order to meet the production rhythm, it is necessary to assemble in multiple batches, increasing the screw fastening equipment; under high vibration or dynamic load conditions, the screws may loosen or fail, resulting in poor product reliability; the screw method has a relatively large contact resistance (generally between 20 μΩ and 30 μΩ), and the screws need to occupy a large layout space, and a parallel misalignment design of the terminals is also required, which will increase the series inductance.

[0155] Therefore, the screw fixing scheme leads to complex assembly processes, requires a large assembly space, and the screw 8 will occupy a large space after assembly. Moreover, the screw 8 fixing method is prone to problems such as loosening, increased contact resistance, and thermal over-tolerance after vibration.

[0156] To solve the above problems, the technical solution of the present application provides a power component, including:

[0157] A power module and a capacitor component stacked;

[0158] The capacitor component is connected with a first terminal and a second terminal that are insulated from each other; the first terminal and the second terminal are arranged opposite to each other;

[0159] The power module includes a plurality of sub-power modules; the sub-power modules are connected with a third terminal and a fourth terminal that are insulated from each other, the third terminal and the fourth terminal are arranged opposite to each other; at least two sub-power modules are connected to the same third terminal and the same fourth terminal;

[0160] The first terminal and the third terminal are connected, and the second terminal and the fourth terminal are connected.

[0161] In the technical solution of this application, the first terminal and the second terminal are arranged in a stacked and opposite manner, and the third terminal and the fourth terminal are arranged in a stacked and opposite manner, which can increase the stacked relative area between the terminals. Setting multiple sub-power modules to share the third terminal and the fourth terminal can further increase the stacked relative area between the terminals and reduce the series inductance.

[0162] Optionally, between the first terminal and the third terminal, and between the second terminal and the fourth terminal, they can be fixedly connected based on welding respectively, which can make the contact resistance between the two connected terminals relatively low, reduce the thermal risk, and the vibration resistance of each terminal is relatively strong. When the power component experiences large vibrations or has been used for a long time, the connection position between the terminals will not become loose, thus avoiding problems such as an increase in contact resistance and thermal over-tolerance caused by poor contact between the terminals, and reducing the risk problems caused by abnormal temperature of the power component.

[0163] Furthermore, if the terminals can be fixedly connected based on welding, compared with the conventional connection scheme of fixing the terminals with screws, in the technical solution of this application, the terminals are fixed by welding, which can realize welding treatment by an automated welding device, improve the degree of operation automation, reduce materials and material management, eliminate the need to separately set the space required for screws, greatly simplify the assembly process, improve the assembly efficiency, reduce the volume of the power component, and reduce the material cost. And the welding process has a relatively small contact resistance. For example, if laser welding is used, the contact resistance can be reduced to about 5 μΩ. In addition, this application can also avoid the problem of increased series inductance caused by the misaligned parallel design of the terminals required by the screw fixing scheme, which reduces the area of the terminal facing area.

[0164] To make the above objects, features, and advantages of this application more obvious and understandable, the following further details this application in conjunction with the drawings and specific embodiments.

[0165] Refer to Figure 9 and Figure 10 , Figure 9 which is a side view of a power component provided by an embodiment of this application, Figure 10 is Figure 9 the top view of the power module in the power component shown, and the power component shown includes:

[0166] The power module 1 and the capacitor component 2 arranged in a stacked manner.

[0167] The capacitor component 2 is connected with the mutually insulated first terminal T1 and second terminal T2; the first terminal T1 and the second terminal T2 are arranged oppositely;

[0168] The power module 1 includes a plurality of sub-power modules 7; the sub-power module 7 is connected with a mutually insulated third terminal T3 and a fourth terminal T4, and the third terminal T3 and the fourth terminal T4 are oppositely arranged; at least two sub-power modules 7 are connected to the same third terminal T3 and the same fourth terminal T4;

[0169] The first terminal T1 is connected to the third terminal T3, and the second terminal T2 is connected to the fourth terminal T4.

[0170] Optionally, the first terminal T1 and the third terminal T3 can be fixedly connected based on welding, and the second terminal T2 and the fourth terminal T4 can be fixedly connected based on welding. The welding can be laser welding or other welding methods, and the embodiments of the present application do not limit this. In the subsequent implementation manners of the present application, the connection between the terminals is realized in the manner of fixedly connecting the terminals based on welding. In the embodiments of the present application, other fixed connection methods can also be adopted, not limited to laser welding, and screw fixing or snap connection can also be adopted.

[0171] Among them, Figure 10 Taking the example that the power module 1 includes three sub-power modules 7 for illustration, these three sub-power modules 7 are connected to the same third terminal T3 and the same fourth terminal T4. In the embodiments of the present application, the number of sub-power modules 7 in the power module 1 can be set according to requirements, and the number of sub-power modules 7 sharing the third terminal T3 and sharing the fourth terminal T4 can be set according to requirements, not limited to Figure 10 the shown manner.

[0172] In the embodiments of the present application, the first terminal T1 and the second terminal T2 are stacked and oppositely arranged, which can increase the stacked relative area of the first terminal T1 and the second terminal T2. The third terminal T3 and the fourth terminal T4 are stacked and oppositely arranged, which can increase the stacked relative area of the third terminal T3 and the fourth terminal T4. Setting a plurality of sub-power modules to share the third terminal and the fourth terminal can further increase the stacked relative area of the third terminal T3 and the fourth terminal T4. Based on the above formula (3), it can be known that increasing the stacked relative area between the terminals can increase the coupling coefficient k, and further reduce the series inductance.

[0173] Optionally, the surface 3 of the capacitor component 2 facing the power module 1 is connected with a first terminal T1 and a second terminal T2 which are insulated from each other; the first terminal T1 and the second terminal T2 are oppositely arranged in the first direction X; the first terminal T1 and the second terminal T2 can both be vertically led out from the surface 3. The same end 4 of the power module 1 is connected with a third terminal T3 and a fourth terminal T4 which are insulated from each other, and the third terminal T3 and the fourth terminal T4 can both be vertically led out from the end 4; the end 4 faces the first terminal T1 and the second terminal T2, that is, the first terminal T1 and the second terminal T2 are located on the same side of the end 4; the third terminal T3 includes a first-segment terminal T01 connected to the end 4, and the first-segment terminal T01 can be perpendicular to the end 4; the fourth terminal T4 includes a second-segment terminal T02 connected to the end 4, and the second-segment terminal T02 can be perpendicular to the end 4; the first-segment terminal T01 and the second-segment terminal T02 are parallel to the first direction X and are oppositely arranged in the second direction Y;

[0174] Wherein, the second direction Y is parallel to the stacking direction of the power module 1 and the capacitor component 2, and the first direction X is perpendicular to the second direction Y; the first terminal T1 is connected to the third terminal T3, and the second terminal T2 is connected to the fourth terminal T4. Optionally, the connection manner between the terminals can be laser welding or other connection methods, and the embodiments of the present application do not limit this.

[0175] Optionally, in the power component, each sub-power module 7 can be arranged in sequence along the third direction Z.

[0176] Since the first terminal T1 and the second terminal T2 are oppositely arranged in the first direction X, the first terminal T1 and the second terminal T2 can be stacked in the first direction X, which is equivalent to increasing the width WS of the overlapping area between the two, and can reduce the series inductance of the current loop. Since the first-segment terminal T01 and the second-segment terminal T02 are oppositely arranged in the second direction Y, the first-segment terminal T01 and the second-segment terminal T02 can be stacked in the second direction Y, which is equivalent to increasing the width WS of the overlapping area between the two, and can reduce the series inductance of the current loop. Therefore, the present application can reduce the series inductance in the power component and avoid the adverse effects on the performance of the power component due to excessive series inductance.

[0177] Moreover, the first terminal T1 and the third terminal T3, and the second terminal T2 and the fourth terminal T4 can be respectively connected and fixed by welding, which can make the contact resistance between the two connected terminals relatively low, reduce the thermal risk, and the vibration resistance of each terminal is relatively strong, so that when the power component vibrates greatly or is used for a long time, the connection position between the terminals will not become loose, thereby avoiding problems such as an increase in contact resistance and thermal overshoot caused by poor contact between the terminals, and reducing the risk problems caused by abnormal temperature of the power component.

[0178] Compared with the connection solution in which the terminals are fixed by screws 8, the terminals in the technical solution of the present application can be fixed by welding, without the need to set up the space required for the screws 8 separately, which can greatly simplify the assembly process, improve assembly efficiency, reduce the volume of the power components, and reduce material costs.

[0179] Furthermore, the technical solution of the present application can also reduce the size of b1 and b2, and then reduce the size of b01 and b02, thereby reducing material costs by optimizing the size of the power chip in the power module 1 and the layout of the pins 70 used to connect to the PCB.

[0180] In the embodiment of the present application, the fourth terminal T4 is located between the third terminal T3 and the capacitor component 2. In the second direction Y, the fourth terminal T4 faces the capacitor component 2, and the third terminal T3 is located on the side of the fourth terminal T4 away from the capacitor component 2; the second terminal T2 is located between the first terminal T1 and the end 4. In the first direction X, the first terminal T1 faces away from the end 4, and the second terminal T2 faces the end 4. In this way, Figure 9 As shown, the connection structure formed by the first terminal T1 and the third terminal T3 can be stacked with the connection structure formed by the second terminal T2 and the fourth terminal T4 to facilitate the connection between the capacitor assembly 2 and the positive terminal and the negative terminal of the power module 1.

[0181] In the embodiment of the present application, each sub-power module 7 may have an AC terminal 9 and two DC terminals, and the two DC terminals are respectively a third terminal T3 and a fourth terminal T4.

[0182] refer to Figure 11 and Figure 12 , Figure 11 A three-dimensional view of a power component provided in an embodiment of the present application, Figure 12 for Figure 11 A three-dimensional view of a power module in the power assembly shown. Based on other embodiments, Figure 11 and Figure 12 In the illustrated manner, multiple sub-power modules 7 in the same power module 1 are all connected to the same third terminal T3, and are all connected to the same fourth terminal T4. In this manner, the first terminal T1 and the third terminal T3 are connected based on the adapter terminal T5 as an example for illustration. As described below, the interconnected terminals can be connected through the adapter terminal T5, or the two terminals to be connected can be directly connected.

[0183] Figure 11 and Figure 12In the shown method, in the same power module 1, each sub-power module 7 adopts a separate lining plate 6, which can realize accurate and fine control of the power chip in the sub-power module 7. When this method is used for the drive control module, the amplitude, phase and frequency of the current of the drive motor can be more accurately controlled to ensure that the torque and speed output by the drive motor can accurately respond to operating instructions and the requirements of the vehicle control system.

[0184] When a plurality of sub-power modules 7 share the third terminal T3 and the fourth terminal T4, the stacking relative area of ​​the positive and negative terminals of these terminals can be maximized to minimize the series inductance.

[0185] refer to Figure 13 , Figure 13 A three-dimensional view of a power module in a power assembly. Based on other methods, Figure 13 In the illustrated manner, at least one sub-power module 7 of the power module 1 is connected to a separate third terminal T3 and a separate fourth terminal T4. Figure 13 In the embodiment, a power module 1 including three sub-power modules 7 having a separate third terminal T3 and a separate fourth terminal T4 is taken as an example for illustration.

[0186] refer to Figure 14 and Figure 15 , Figure 14 A three-dimensional view of another power component provided in an embodiment of the present application, Figure 15 for Figure 14 A three-dimensional view of a power module in the power assembly shown. Based on other embodiments, Figure 14 and Figure 15 In the illustrated manner, multiple sub-power modules 7 in the same power module 1 use the same liner 6, and are connected to the same third terminal T3 and the same fourth terminal T4. In this manner, the first terminal T1 and the third terminal T3 are connected based on the adapter terminal T5 as an example for illustration. As described below, the interconnected terminals can be connected through the adapter terminal T5, or the two terminals to be connected can be directly connected.

[0187] Figure 14 and Figure 15In the shown manner, in the same power module 1, each sub-power module 7 adopts the same lining plate 6. This can reduce costs, improve the integration level while ensuring certain performance, and will not have too much impact on the energy conversion efficiency. This manner can be used in the power generation control module. Compared with the drive motor, the working current characteristics of the power generation motor are relatively simple. During power generation, alternating current is converted into direct current through the power generation control module, and the change frequency and amplitude of the current are relatively stable. There is no need for complex control and regulation of the current like in the drive motor. Therefore, sharing the same lining plate 6 for each sub-power module 7 in the power generation control module can also meet the basic control requirements for the power generation motor.

[0188] Reference Figure 16 , Figure 16 FIG. [FIG. number not provided in the original, assuming it's a reference figure] is a three-dimensional view of a power component provided by an embodiment of the present application. The power component includes at least one of a drive control module 101 and a power generation control module 102. The drive control module 101 is used to connect to a drive motor; the power generation control module 102 is used to connect to a power generation motor; wherein, both the drive control module 101 and the power generation control module 102 include a power module 1 and a capacitor component 2 arranged in a stacked manner. The third terminal T3 and the first terminal T1 can be connected through an adapter terminal T5 as Figure 16 shown, or as described below, they can be directly connected.

[0189] If the power component includes both the drive control module 101 and the power generation control module 102, when the first terminal T1 and the third terminal T3 are connected based on the adapter terminal T5, one implementation manner can be as Figure 16 shown. The drive control module 101 and the power generation control module 102 share the same adapter terminal T5. At this time, the connection between the first terminal T1 and the third terminal T3 in the drive control module 101 and the connection between the first terminal T1 and the third terminal T3 in the power generation control module 102 are both through the same adapter terminal T5.

[0190] In other implementation manners, if the power component includes both the drive control module 101 and the power generation control module 102, when the first terminal T1 and the third terminal T3 are connected based on the adapter terminal T5, it is also possible to set the drive control module 101 and the power generation control module 102 to respectively adopt independent adapter terminals T5. At this time, the connection between the first terminal T1 and the third terminal T3 in the drive control module 101 is through one adapter terminal T5, and the connection between the first terminal T1 and the third terminal T3 in the power generation control module 102 is through another adapter terminal T5.

[0191] In the drive control module 101, by setting the first terminal T1 and the second terminal T2 to be stacked in the first direction X, it is equivalent to increasing the width WS of the overlapping area between the two; by setting the first segment terminal T01 and the second segment terminal T02 to be stacked in the second direction Y, it is equivalent to increasing the width WS of the overlapping area between the two. Therefore, based on the above formula (3), the embodiment of the present application can increase WS and reduce the series inductance in the current loop. Similarly, in the power generation control module 102, the series inductance in the current loop can also be reduced by increasing the width WS of the overlapping area between the first terminal T1 and the second terminal T2 and by increasing the width WS of the overlapping area between the first segment terminal T01 and the second segment terminal T02.

[0192] As Figure 16 shown, the power component can adopt a dual-electronic control structure, that is, the power component includes both the drive control module 101 and the power generation control module 102 at the same time; among them, the drive control module 101 and the power generation control module 102 share the same capacitor component 2. This method integrates the drive control module 101 and the power generation control module 102 into one body, enabling them to share the same capacitor component 2. Compared with the scheme of separately encapsulating the two control modules, it can improve the integration degree of the power component, reduce the overall volume, and facilitate the miniaturization of the encapsulation of the dual-electronic control structure.

[0193] The drive control module 101 includes a plurality of sub-power modules 7, and the sub-power module 7 in the drive control module 101 is the first sub-power module 701. In order to achieve more precise and accurate current control of the drive control module 101, it can be set that each first sub-power module 701 respectively adopts a separate liner 6. Each first sub-power module 701 can be connected to the same third terminal T3 and the same fourth terminal T4.

[0194] The power generation control module 102 includes a plurality of sub-power modules 7, and the sub-power module 7 in the power generation control module 102 is the second sub-power module 702. Since the power generation motor has lower requirements for current control, it can be set that all the second sub-power modules 702 share the same liner 6 to reduce the size of the power generation control module 102 in the third direction Z, thereby reducing the volume of the power component.

[0195] In the embodiment of the present application, each first sub-power module 701 in the drive control module 101 is connected to the same third terminal T3 and the same fourth terminal T4, or at least part of the first sub-power modules 701 are connected to separate third terminals and separate fourth terminals. Each second sub-power module 702 in the power generation control module 102 is connected to the same third terminal T3 and the same fourth terminal T4.

[0196] If the power component includes both a drive control module 101 and a power generation control module 102, the first sub-power module 701 and the second sub-power module 702 are respectively connected to different third terminals T3 and different fourth terminals T4, so that the two control modules can be separately manufactured. The third terminals T3 of the two control modules can be separately manufactured, and the fourth terminals T4 can be separately manufactured, so as to avoid connecting the larger-sized third terminals T3 and the larger-sized fourth terminals T4 to the two control modules.

[0197] The drive control module 101 includes a plurality of first sub-power modules 701, and the power generation control module 102 includes a plurality of second sub-power modules 702. Optionally, the drive control module 101 includes three first sub-power modules 701, and the AC terminals 9 of the three first sub-power modules 701 are respectively used to connect to a phase of the AC terminals of the drive motor. The three first sub-power modules 701 respectively have independent liners 6. The power generation control module 102 includes three second sub-power modules 702, and the AC terminals 9 of the three second sub-power modules 702 are respectively used to connect to a phase of the AC terminals of the power generation motor. The three second sub-power modules 702 share the same liner 6. Compared with the conventional solution in which the three second sub-power modules 702 in the power generation control module 102 respectively use separate liners 6, the present application can improve the integration degree of the power generation control module 102 and reduce the product size.

[0198] Both the first sub-power module 701 and the second sub-power module 702 include a half-bridge circuit located on the corresponding liner 6, and the half-bridge circuit is a control circuit formed by interconnecting a plurality of power chips. The plurality of half-bridge circuits in the same control module form a full-bridge circuit. The specific circuit form of the half-bridge circuit in the embodiments of the present application is not limited, including but not limited to Figure 30 the circuit form shown.

[0199] In the present application, the number of sub-power modules 7 in the drive control module 101 and the power generation control module 102 can be determined according to the type and number of the connected motors, and is not limited to three described in the embodiments of the present application. The embodiments of the present application do not limit the number of sub-power modules 7 in the power module 1.

[0200] As described above, such as Figures 3 - 8As shown, in a general double-electric-control structure, since screw connection may lead to a large contact resistance and there is a high risk of thermal failure, and the positive and negative terminals are arranged in a misaligned and parallel manner in a local area, resulting in a large ESL in this area, which in turn leads to a large bus surge voltage and a large bus voltage fluctuation, seriously affecting the performance of the power component. In the embodiment of the present application, by stacking the first terminal T1 and the second terminal T2 in the first direction X, and stacking the first-segment terminal T01 and the second-segment terminal T02 in the second direction Y, the width WS of the overlapping area of the positive and negative terminals can be increased, the ESL in the current loop can be reduced, and thus the adverse effect on the performance of the power component due to a large ESL can be avoided, improving the performance of the power component.

[0201] As described above, in the embodiment of the present application, it is possible to set that each second sub-power module 702 in the power generation control module 102 uses the same liner 6. Compared with the solution where each second sub-power module 702 in the power generation control module 102 uses an independent liner 6, the solution of the present application can achieve miniaturization of the liner of the power generation control module 102. Moreover, each second sub-power module 702 can be integrated from multiple original separate half-bridge circuits into a full-bridge circuit located on the same DBC (Direct Bonded Copper). In this way, the three second sub-power modules 702 of the power generation control module 102 can share the same third terminal T3 and the same fourth terminal T4, that is, they share the same positive terminal and the same negative terminal, reducing the number of DC terminals, making the size of the power generation control module 102 smaller, and making the size of the power component smaller. While improving the product performance, the material cost is reduced, and at the same time, the stacked area of the positive and negative terminals is maximally increased to reduce the ESL to a greater extent.

[0202] In the embodiment of the present application, a large-area stacking design can also be made for the two DC terminals of the power module 1 in the area where the first-segment terminal T01 and the second-segment terminal T02 are facing each other, so that the facing area of the two in this area is equal to or approximately equal to 100%. This can reduce the ESL, make the terminal width in the current loop larger, increase the width WS of the terminal overlapping area, and further reduce the ESL.

[0203] In the capacitor component 2, the first terminal T1 and the second terminal T2 are directly led out perpendicular to the surface 3, with a simple structure. The capacitor component 2 and the terminals of the power module 1 can be connected and fixed by welding, reducing the connection resistance between the terminals.

[0204] Moreover, the connection regions corresponding to the third terminal T3 and the fourth terminal T4 can be designed in parallel, or the connection regions corresponding to the third terminal T3 and the fourth terminal T4 can be designed perpendicularly. The connection region corresponding to one of them is located in the overlapping region of the terminals in the second direction Y, and the connection region corresponding to the other is located in the overlapping region of the terminals in the first direction X.

[0205] In one way, as Figure 16 shown, the first terminal T1 and the second terminal T2 of the capacitor component 2 are perpendicular to the surface 3. After the second terminal T2 is directly connected to the fourth terminal T4, the first terminal T1 and the third terminal T3 can be connected through the transfer terminal T5, so as to reserve a connection window for the second terminal T2 and the fourth terminal T4 between the first terminal T1 and the third terminal T3, facilitating the connection and assembly of the terminals between the capacitor component 2 and the power module 1.

[0206] Optionally, both the second terminal T2 and the fourth terminal T4 can be positive terminals, and both the first terminal T1 and the third terminal T3 can be negative terminals. At this time, the positive terminals of the power module 1 and the capacitor component 2 can be directly welded and fixed, and the negative terminals of the two are transferred through the transfer terminal T5. The transfer terminal T5 can be welded and fixed to the first terminal T1 and the third terminal T3 respectively. In other ways, it can also be set that both the second terminal T2 and the fourth terminal T4 are negative terminals, and both the first terminal T1 and the third terminal T3 are positive terminals.

[0207] When used to control a three-phase motor, in the double-electronic control structure, the drive control module 101 and the power generation control module 102 can, according to different usage requirements, set three first sub-power modules 701 as three independent single-phase half-bridge circuits, and each first sub-power module 701 is separately encapsulated with a small-sized liner 6; set three second sub-power modules 702 to share the same liner 6 (this liner is a full-bridge liner), adopt an integrated three-phase full-bridge circuit, share the same positive terminal, and share the same negative terminal. The drive control module 101 and the power generation control module 102 use a total of four liners 6. Compared with Figure 4 the way, in the case where the size of b1 remains unchanged, the present application can reduce the size of b2, and further can reduce the size of b02, as well as reduce the overall size b01 + b02 of the power component. The present application embodiment does not limit the sizes of the liners 6 respectively adopted by the drive control module 101 and the power generation control module 102.

[0208] In the embodiment of the present application, when used to control a three-phase motor, the three first sub-power modules 701 in the drive control module 101 can also be a three-phase full-bridge circuit; the three second sub-power modules 702 in the power generation control module 102 can be a three-phase full-bridge circuit.

[0209] In the dual electric control structure, the drive control module 101 and the power generation control module 102 can be a six-phase full-bridge circuit structure, or each first sub-power module 701 in the drive control module 101 can be a single-phase half-bridge circuit structure independently packaged with a small-size liner 6, and the three second sub-power modules 702 in the power generation control module 102 can be a three-phase full-bridge circuit structure with an integrated liner 6.

[0210] It should be noted that the embodiments of the present application are not limited to Figure 16 The dual electric control structure shown, Figure 16 The example of a power assembly including both a drive control module 101 and a power generation control module 102 is used for illustration. The power assembly may also include the drive control module 101 alone or the power generation control module 102 alone. These implementations can reduce the ESL of the current loop. When the power assembly includes one of the drive control module 101 and the power generation control module 102, it may be a three-phase full-bridge circuit structure sharing the same liner 6, or three single-phase half-bridge circuit structures using independent liner 6, or other circuit structures. The embodiment of the present application does not limit the circuit structure in the power module 1.

[0211] In the embodiment of the present application, the power module 1 and the capacitor assembly 2 are stacked in the second direction Y, which can reduce the area occupied by the power assembly relative to the layout mode in which the capacitor assembly 2 and the power module 1 are coplanar. The capacitor assembly 2 can be arranged above the power module 1, or the power module 1 can be arranged above the capacitor assembly 2, which is not limited in the embodiment of the present application.

[0212] refer to Figures 17 - 20 , Figure 17 A partial side view of a terminal connection structure of a power module and a capacitor assembly in a power assembly provided in an embodiment of the present application, Figure 18 for Figure 17 A top view of the power components shown, Figure 19 for Figure 17 The right side view of the power component before connecting the transfer terminal. Figure 20 for Figure 17 The right side view of the power component after connecting the adapter terminal is shown. In this method, the terminal connection path between the capacitor component 2 and the power module 1 also includes the first area D1 to the fourth area D4, and the spacing between the third terminal T3 and the fourth terminal T4 of the power module 1 and the spacing between the first terminal T1 and the second terminal T2 in the capacitor component 2 can both be H0.

[0213] The first section terminal T01 includes an integrated first part and a second part, the first part is connected to the end 4, and the second part is located on the side of the first part away from the end 4; the first section terminal T01 is located in the first area D1 as the first part, and is located in the second area D2 as the second part.

[0214] As Figure 18 shown, the width W1 of the first part is less than the width W2 of the second part, where W1 and W2 are the lengths of the terminals in the third direction Z, the third direction Z is perpendicular to the first direction X and the second direction Y, and is parallel to the surface 3. If W1 is less than W2, an installation space can be reserved to facilitate the fixing of the external housing, and it is convenient to use the housing to encapsulate and protect the internal components of the power component. In other ways, the width W1 of the first part can also be set equal to the width W2 of the second part.

[0215] Among them, the lengths of the first region D1 and the second region D2 in the first direction X can be adjusted according to the product layout requirements, and the present application does not limit the lengths of these two regions. The values of W1 and W2 can be designed according to performance requirements and forming requirements. Theoretically, the larger the values of W1 and W2, the smaller the ESL.

[0216] As Figure 19 and Figure 20 shown, both the first terminal T1 and the second terminal T2 include an integral third part and a fourth part; in the same terminal, the fourth part is connected to the surface 3, and the third part is located on the side of the fourth part away from the surface 3; among them, the width W3 of the third part is less than the width W4 of the fourth part. W3 and W4 are the nominal widths of the third part and the fourth part respectively. The local parts of the first terminal T1 and the second terminal T2 in the fourth region D4 are the fourth parts, and the widths of the fourth parts of both are W4. The local parts of the first terminal T1 and the second terminal T2 in the third region D3 are both the third parts. Among them, the actual width of the third part of the first terminal T1 is W3-, and the actual width of the third part of the second terminal T2 is W3+, and W3+ and W3- are equal to or approximately equal to W3. In this way, W3 is less than W4, an installation space can be reserved to facilitate the fixing of the external housing, and it is convenient to use the housing to encapsulate and protect the internal components of the power component. In other ways, the width W3 of the third part can be equal to the width W4 of the fourth part.

[0217] Optionally, set W1 < W2 = W3 < W4, which can not only facilitate reserving the housing installation space, but also largely ensure the relative area of terminal stacking, and can reduce the ESL of the current loop.

[0218] In the embodiments of the present application, the thickness of at least one of the first terminal T1, the second terminal T2, the third terminal T3, and the fourth terminal T4 is 1 mm to 2 mm. In the embodiments of the present application, the numerical ranges all include the endpoint values. The thickness of each terminal can be 1.2 mm, or 1.5 mm, or 1.7 mm, or 1.9 mm, etc. When the terminal thickness is within this value range, on the one hand, the terminal thickness can be made larger, having a smaller ESL. On the other hand, it can also avoid the excessive thickness affecting the volume of the product, and can avoid the excessive terminal thickness resulting in a large mechanical strength, so as to facilitate the stacked connection between the terminals and the bending and shaping of the terminals.

[0219] Optionally, for the convenience of process preparation, the first terminal T1, the second terminal T2, the third terminal T3, and the fourth terminal T4 can be set to have the same or similar thickness, so as to facilitate the preparation of the terminals in the capacitor component 2 and the power module 1.

[0220] In one embodiment, the distance between the first terminal T1 and the second terminal T2 is 1.5 mm to 2 mm, and this distance can be 1.4 mm, or 1.7 mm, or 1.9 mm, etc.; and / or, the distance between the third terminal T3 and the fourth terminal T4 is 1.5 mm to 2 mm, and this distance can be 1.4 mm, or 1.7 mm, or 1.9 mm, etc. When the distance between the terminals is within this value range, the distance between the terminals can be made moderate. On the one hand, the distance between the terminals can be made smaller, which can reduce the ESL. On the other hand, it can avoid the short-circuit problem caused by too small a spacing.

[0221] Optionally, for the convenience of process preparation, the distance between the first terminal T1 and the second terminal T2 can be set to be equal to or approximately equal to the distance between the third terminal T3 and the fourth terminal T4.

[0222] On the basis of other embodiments, it is also possible that the perpendicular projections of the first terminal T1 and the second terminal T2 on the first surface at least partially overlap; the first surface is perpendicular to the first direction X. As Figure 13 shown, the first surface is the projection plane of the Figure 19 right view shown. Setting the perpendicular projections of the first terminal T1 and the second terminal T2 to at least partially overlap can make the two form a stacked relative area, so as to facilitate reducing the series inductance.

[0223] On the basis of other embodiments, it is also possible to set the perpendicular projections of the third terminal T3 and the fourth terminal T4 on the second plane to at least partially overlap; the second plane is perpendicular to the second direction. As Figure 18 shown, the second surface is the projection plane of the Figure 18 top view shown. Setting the perpendicular projections of the third terminal T3 and the fourth terminal T4 to at least partially overlap can make the two form a stacked relative area, so as to facilitate reducing the series inductance.

[0224] The edges of the first terminal T1 and the second terminal T2 located on both sides of the second direction Y satisfy the flush condition, which can make the vertical projections of the two overlap to a large extent, and / or, the edges of the third terminal T3 and the fourth terminal T4 located on both sides of the first direction X satisfy the alignment condition, which can make the vertical projections of the two overlap to a large extent. Among them, the edges satisfying the flush condition means that the edges of the two terminals are flush or approximately flush.

[0225] When the edges of the first terminal T1 and the second terminal T2 located on both sides of the second direction Y satisfy the flush condition, as Figure 19 and Figure 20 shown, the left edges of the first terminal T1 and the second terminal T2 are flush or approximately flush, and the right edges of the first terminal T1 and the second terminal T2 are flush or approximately flush. Within the height overlap range of the first terminal T1 and the second terminal T2, 100% or approximately 100% coincidence of the first terminal T1 and the second terminal T2 can be achieved, and the graphic structures of the two within this height overlap range can be exactly the same or approximately the same, so that a large overlap area can be formed between the two along the second direction Y, thereby greatly reducing the ESL. Optionally, the misalignment distance between the opposite edges of the first terminal T1 and the second terminal T2 does not exceed 0.2 mm, so that the edges of the first terminal T1 and the second terminal T2 located on both sides of the second direction Y satisfy the flush condition.

[0226] When the edges of the third terminal T3 and the fourth terminal T4 located on both sides of the first direction X satisfy the alignment condition, as Figure 18 shown, the upper edges of the third terminal T3 and the fourth terminal T4 are flush or approximately flush, and the lower edges of the third terminal T3 and the fourth terminal T4 are flush or approximately flush. Within the length overlap range of the first-stage terminal T01 and the second-stage terminal T02, 100% or approximately 100% coincidence of the fourth terminal T4 and the third terminal T3 can be achieved, and the graphic structures of the two within this length overlap range can be exactly the same or approximately the same, so that a large overlap area can be formed between the two along the first direction X, thereby greatly reducing the ESL. Optionally, the misalignment distance between the opposite edges of the third terminal T3 and the fourth terminal T4 does not exceed 0.2 mm, and the edges of the third terminal T3 and the fourth terminal T4 located on both sides of the first direction X satisfy the alignment condition.

[0227] It should be noted that in the relative areas where the edges of the first terminal T1 and the second terminal T2 satisfy the flush condition and the relative areas where the edges of the third terminal T3 and the fourth terminal T4 satisfy the flush condition, through holes penetrating the terminals can be added in the relative areas based on the assembly requirements.

[0228] As Figures 17 - 20As shown, the fourth terminal T4 further includes a third segment terminal T03 connected to the second segment terminal T02; the third segment terminal T03 is parallel to the second direction Y and extends toward the capacitor component 2; wherein, the third segment terminal T03 and the second terminal T2 have a first overlapping area A1 in the first direction X, and the two are connected in the first overlapping area A1; the third terminal T3 and the first terminal T1 are connected through an adapter terminal T5.

[0229] The third segment terminal T03 is perpendicular to the second segment terminal T02. The third segment terminal T03 is the outgoing line end of the fourth terminal T4 and is used for directly connecting with the second terminal T2. With reference to the surface 3, the third segment terminal T03 is perpendicular to the surface 3, so the fourth terminal T4 is a vertical outgoing line structure, and its connection surface faces Figure 17 the right side in the figure. The third terminal T3 can be connected to the adapter terminal T5 at the first segment terminal T01. The first segment terminal T01 is the outgoing line end of the third terminal T3. With reference to the surface 3, the first segment terminal T01 is parallel to the surface 3, so the third terminal T3 is a parallel outgoing line structure, and its connection surface faces Figure 17 the upper side in the figure. In this way, the connection surfaces of the third terminal T3 and the fourth terminal T4 face perpendicularly, and two more sufficient different connection positions can be formed within a limited space, facilitating the connection of the terminals between the capacitor component 2 and the power module 1.

[0230] In Figures 17 - 20 the shown manner, the second segment terminal T02 and the third segment terminal T03 in the fourth terminal T4 are a vertical bending structure. The fourth terminal T4 can form a first overlapping area A1 with the second terminal T2 in the first direction X based on the third segment terminal T03 extending toward the capacitor component 2, facilitating the connection between the fourth terminal T4 and the second terminal T2 in the first overlapping area A1. Moreover, a connection window for connection in the first overlapping area A1 can be formed between the first terminal T1 and the third terminal T3, facilitating the connection between the fourth terminal T4 and the second terminal T2.

[0231] Optionally, in the first direction X, the third terminal T3 exposes at least part of the third segment terminal T03 to form a connection window between the third segment terminal T03 and the counterparty (the second terminal T2) for facilitating the connection between the third segment terminal T03 and the second terminal T2. Among them, the length of the third segment terminal T03 exposed by the third terminal T3 does not exceed 10 mm, and the specific value can be adjusted according to actual requirements. In Figure 17 the shown manner, in the first direction X, the third terminal T3 exposes the entire third segment terminal T03.

[0232] As Figure 19 shown, the width of the third segment terminal T03 can be W3+, and the width W3+ of the third segment terminal T03 can be set to be the same or approximately the same as the width W2 of the fourth terminal T4 in the second region D2.

[0233] Relative to Figures 6 - 8 As shown, Figures 17 - 20 In the manner shown, under the same size of the first area D1 to the fourth area D4 (the length of the extension path from the first area D1 to the fourth area D4 remains unchanged), the length of the current loop where the positive and negative terminals of the power module 1 and the capacitor assembly 2 are located can be unchanged, so that the terminals of the first area D1 to the fourth area D4 have a larger width, and the positive and negative terminals have a larger overlapping area in the relative area. The W1 value of the positive and negative terminals of the power module 1 in the first area D1 with the smallest width is also Figures 6 - 8 At least twice of W1 in the manner shown. In addition, in the first region D1 to the fourth region D4, the stacked positive and negative terminals have an overlap degree close to 100%, which can have a larger coupling coefficient k. Combined with the above formula (3), when k is larger, the ESL can be effectively reduced.

[0234] In the first direction X, there is a gap between the third terminal T3 and the first terminal T1 that exposes the first overlapping area A1, and the transition terminal T5 covers the gap. Based on the gap between the third terminal T3 and the first terminal T1, a connection window can be formed for connecting the fourth terminal T4 and the second terminal T2 in the first overlapping area A1, which facilitates the connection between the fourth terminal T4 and the second terminal T2.

[0235] like Figure 17 As shown, the adapter terminal T5 and the first terminal T1 have a second overlapping area A2 in the first direction X, and the two are connected in the second overlapping area A2; the adapter terminal T5 and the third terminal T3 have a third overlapping area A3, and the two are connected in the third overlapping area A3. The adapter terminal T5 can be connected to the first terminal T1 and the third terminal T3 respectively based on the second overlapping area A2 and the third overlapping area A3, and the positions of the second overlapping area A2 and the third overlapping area A3 relative to the first overlapping area A1 can be adjusted so that the gap between the third terminal T3 and the first terminal T1 can form a connection window for connecting the fourth terminal T4 and the second terminal T2 in the first overlapping area A1, so as to facilitate the connection between the capacitor component 2 and the power module 1.

[0236] Optionally, the first overlapping area A1 and the second overlapping area A2 do not overlap in the first direction X, and the first overlapping area A1 and the second overlapping area A2 are designed to be offset in the first direction X. If the first overlapping area A1 and the second overlapping area A2 have an overlapping portion in the first direction X, the overlapping portion has a greater thickness in the first direction X, which will increase the volume of the product.

[0237] In one way, Figure 17As shown, in the second direction Y, the distance between the first overlapping region A1 and the capacitor component 2 is greater than the distance between the second overlapping region A2 and the capacitor component 2. That is to say, with the surface 3 as a reference, the minimum height of the first overlapping region A1 is greater than the maximum height of the second overlapping region A2. In this way, when the length of the third-segment terminal T03 is fixed, the second overlapping region A2 can be arranged using the space between it and the surface 3, avoiding a large thickness of the product in the second direction Y.

[0238] In one way, as Figure 17 shown, the adapter terminal T5 and the third terminal T3 have a third overlapping region A3, and the two are connected in the third overlapping region A3. This way can realize the connection between the adapter terminal T5 and the third terminal T3 in the third overlapping region A3, and a relatively large-width overlapping region can also be formed based on the third overlapping region A3 and the fourth terminal T4, thereby reducing the ESL.

[0239] Optionally, as Figure 17 shown, the adapter terminal T5 and the first-segment terminal T01 can have a third overlapping region A3 in the second direction Y. At this time, the adapter terminal T5 can be directly connected to the first-segment terminal T01, and there is no need to set other segments of the third terminal T3 to be connected to the first-segment terminal T01, making the design of the third terminal T3 relatively simple. In this way, the adapter terminal T5 and the third terminal T3 have an overlapping part in the second direction Y to form the third overlapping region A3, and have an overlapping part with the first terminal T1 in the first direction X to form the second overlapping region A2. The third-segment terminal T03 and the second terminal T2 form the first overlapping region A1 in the first direction X, and the connection directions of the third terminal T3 and the fourth terminal T4 of the power module 1 are perpendicular to each other.

[0240] Referring to Figure 21 , Figure 21 is a side view of the terminal connection structure of the power module and the capacitor component in a power component provided by an embodiment of the present application. On the basis of the above embodiments, Figure 21 In the shown way, the third terminal T3 further includes a fourth-segment terminal T04 connected to the first-segment terminal T01; the fourth-segment terminal T04 is parallel to the second direction Y and extends away from the capacitor component 2; the adapter terminal T5 and the fourth-segment terminal T04 have a third overlapping region A3 in the first direction X. In this way, the outgoing line end of the third terminal T3 is the fourth-segment terminal T04, and the fourth-segment terminal T04 is perpendicular to the surface 3. With the surface 3 as a reference, the third terminal T3 has a vertical outgoing line structure, and its connection surface faces Figure 21 the right side in Figure 21 In the shown way, the design of the positive and negative terminals in the capacitor component 2 can be the same as that in Figure 17 the shown way. This way can also increase the terminal width and the overlapping region area of the positive and negative terminals, and reduce the ESL.

[0241] The fourth-segment terminal T04 serves as a connection window for connecting to a connection counterpart (adapter terminal T5). Its length can be no more than 10 mm, and this length can be adjusted according to requirements. Optionally, the fourth-segment terminal T04 can be set to have the same or approximately the same width as the first-segment terminal T01.

[0242] Figure 21 In the manner shown, the connection areas in each overlapping region are represented by shaded ellipses. Both the third terminal T3 and the fourth terminal T4 have a vertical lead-out structure, and the graphic structures of the third terminal T3 and the fourth terminal T4 are symmetrical, facilitating the structural design of the terminals in the power module 1. At the same time, the adapter terminal T5 can be connected to the fourth-segment terminal T04 and the first terminal T1 in the same orientation, facilitating the connection and assembly of the adapter terminal T5.

[0243] In the embodiments of the present application, it can be as Figure 21 shown that there is an insulating member 5 between the first terminal T1 and the second terminal T2; there is an insulating member 5 between the third terminal T3 and the fourth terminal T4. Based on the insulating member 5, insulation isolation can be achieved between the positive and negative terminals of the capacitor assembly 2 at a smaller terminal pitch, and insulation isolation can be achieved between the positive and negative terminals of the power module 1 at a smaller terminal pitch. While ensuring insulation isolation between the positive and negative terminals, a smaller terminal pitch can be achieved in the parallel and opposite parts of the positive and negative terminals, which can reduce the ESL.

[0244] Optionally, the insulating member 5 can be an insulating layer or an insulating plastic shell covering the surface of the terminal. The embodiments of the present application do not limit the implementation manner of the insulating member 5.

[0245] Refer to Figure 22 , Figure 22 which is a side view of the terminal connection structure of the power module and the capacitor assembly in another power component provided by the embodiments of the present application. Different from the Figure 21 shown manner, in the Figure 22 shown manner, the fourth-segment terminal T04 is parallel to the second direction Y and extends towards the capacitor assembly 2; the adapter terminal T5 and the fourth-segment terminal T04 have a third overlapping region A3 in the first direction X. Figure 22 The connection areas in each overlapping region are represented by shaded ellipses. In this manner, the fourth-segment terminal T04 is bent towards the capacitor assembly 2, which can reduce the height of the third overlapping region A3 relative to the surface 3, thereby reducing the thickness of the power component in the second direction Y. Figure 22 In the Figure 17 shown manner, the design of the positive and negative terminals in the capacitor assembly 2 can be the same as that in the

[0246] In Figure 22 the shown manner, both the third terminal T3 and the fourth terminal T4 are vertically bent structures, and both the fourth segment terminal T04 and the third segment terminal T03 are bent towards the capacitor component 2, are perpendicular to the surface 3, are vertically lead-out structures, and the connection windows of both face Figure 22 the right side in

[0247] The third terminal T3 includes a vertical first segment terminal T01 and a fourth segment terminal T04. The lengths and widths of the first segment terminal T01 and the fourth segment terminal T04 can be set according to requirements. The fourth segment terminal T04 is a connection window for connecting to the transfer terminal T5. The length of the fourth segment terminal T04 can not exceed 10 mm. A through-hole structure can be designed in the third terminal T3 according to the product assembly requirements.

[0248] The fourth terminal T4 includes a vertical second segment terminal T02 and a third segment terminal T03. The lengths and widths of the second segment terminal T02 and the third segment terminal T03 can be set according to requirements. The third segment terminal T03 is a connection window for directly connecting to the second terminal T2. The length of the third segment terminal T03 can not exceed 10 mm. A through-hole structure can be designed in the fourth terminal T4 according to the product assembly requirements.

[0249] As Figure 22 shown, in the second direction Y, the distance between the third overlapping region A3 and the capacitor component 2 is greater than the distance between the first overlapping region A1 and the capacitor component 2; and the distance between the second overlapping region A2 and the capacitor component 2 is less than the distance between the first overlapping region A1 and the capacitor component 2. That is to say, the height of the third overlapping region A3 is greater than the height of the first overlapping region A1, and the height of the first overlapping region A1 is greater than the height of the second overlapping region A2. In this way, a connection window exposing the first overlapping region A1 can be formed between the third overlapping region A3 and the second overlapping region A2, which is convenient for connecting the third segment terminal T03 and the second terminal T2 in the first overlapping region A1 based on this connection window.

[0250] Optionally, as Figure 22 shown, in the first direction X, there is no relative part between the first overlapping region A1 and the third overlapping region A3, and there is no relative part with the second overlapping region A2, so as to avoid that the connection regions in the two overlapping regions have overlapping parts in the first direction X, resulting in a large spacing required for the terminals in the first direction X to ensure insulation isolation of the connection regions.

[0251] In the embodiment of the present application, based on the transfer terminal T5, the connection between the first terminal T1 and the third terminal T3 is realized. Without increasing the product cost and process complexity, the technical effect of reducing ESL can also be achieved.

[0252] Refer toFigure 23 , Figure 23 This is a side view of the terminal connection structure of the power module and the capacitor module in another power component provided by the embodiment of the present application. On the basis of the above embodiment, the fourth terminal T4 further includes a third segment terminal T03 connected to the second segment terminal T02; the third terminal T3 further includes a fourth segment terminal T04 connected to the first segment terminal T01; both the third segment terminal T03 and the fourth segment terminal T04 extend away from the capacitor module 2; the fourth segment terminal T04 and the first terminal T1 are connected at one end away from the capacitor module 2 to form a first connection area B1; the third segment terminal T03 and the second terminal T2 are connected at one end away from the capacitor module 2 to form a second connection area B2; in the second direction Y, the distance between the second connection area B2 and the capacitor module 2 is less than the distance between the first connection area B1 and the capacitor module 2. This method can also increase the terminal width and the overlapping area of the positive and negative terminals, and can reduce the ESL.

[0253] In Figure 23 the shown manner, the end of the first terminal T1 far from the capacitor module 2 can be directly connected to the end of the third terminal T3 far from the power module 1, and the end of the second terminal T2 far from the capacitor module 2 can be directly connected to the end of the fourth terminal T4 far from the power module 1. The connection of the corresponding terminals of the power module 1 and the capacitor module 2 can be realized without the transfer terminal T5.

[0254] As Figure 23 shown, the fourth segment terminal T04 and the first terminal T1 have a relative part C in the first direction X; the third segment terminal T03 and the second terminal T2 have a first overlapping area A1 in the first direction X; the first overlapping area A1 includes one end of the second connection area B2 located in the accommodation space formed by the relative part C. This method can reuse the accommodation space formed by the relative part C to accommodate at least part of the first overlapping area A1, can reduce the space occupied by the first overlapping area A1 in the second direction Y, and can reduce the size of the product.

[0255] Optionally, as Figure 23 shown, in the relative part C, both the fourth segment terminal T04 and the first terminal T1 protrude toward the side away from the first overlapping area A1 to form an accommodation space. Based on the outward protruding design, the fourth segment terminal T04 and the first terminal T1 can form an accommodation space with a large enough size to place at least the end of the first overlapping area A1 in the accommodation space. In other methods, a square or triangular accommodation space can also be formed above the first overlapping area A1 by the first terminal T1 and the third terminal T3 with a broken line structure, not limited to Figure 23 the shown manner.

[0256] It can be known from the above description that when used for a three-phase motor, if the power component includes a power generation control module 102, the three-phase sub-power modules in the power generation control module 102 can share the same positive terminal and the same negative terminal, that is, the three-phase sub-power modules share the same third terminal T3 and the same fourth terminal T4, which can reduce two positive terminals and two negative terminals relative to the solution in which the three-phase sub-power modules in the same power generation control module 102 have a set of positive and negative terminals respectively. If the power component includes a drive control module 101, the structure of the drive control module 101 is not limited to the above embodiment, and the three sub-power modules in the drive control module 101 can also be a full-bridge circuit, sharing the same positive terminal and the same negative terminal, and the three-phase sub-power modules in the drive control module 101 share the same third terminal T3 and the same fourth terminal T4. Based on the terminal sharing design, the material cost can be reduced. The drive control module 101 can also adopt other multi-phase full-bridge circuits.

[0257] The embodiment of the present application does not limit the circuit structure in the power module 1. Moreover, the technical solution of the present application can also realize a large-area stacking design between the first terminal T1 and the second terminal T2, and between the third terminal T3 and the fourth terminal T4. The entire current loop can adopt a wide-width terminal design, which can functionally solve the problem of excessive ESL, reduce the bus surge voltage, and optimize the switching loss of the module. In addition, based on the graphic structure design of the third terminal T3 and the fourth terminal T4 in the power module 1 provided in the embodiment of the present application, the structure of the first terminal T1 and the second terminal T2 led by the capacitor component 2 can be relatively simple, reducing the material cost of the capacitor component 2.

[0258] In some implementations of the technical solution of the present application, the connection between the first terminal T1 and the third terminal T3 can also be achieved based on the adapter terminal T5, and the terminal structure of the power module 1 and the capacitor assembly 2 can be optimized by setting the shape of the adapter terminal T5.

[0259] In this application, the terminals can be connected by laser welding, and the contact resistance between the terminals is small, which reduces the risk of thermal failure. In addition, the welding method increases the connection strength of the connection position, and its vibration durability reliability is higher than that of the screw connection method, and the assembly efficiency is higher.

[0260] Based on the power components provided in the above embodiments, another embodiment of the present application further provides a preparation method for preparing the power components provided in any one of the above embodiments. The preparation method can be as follows: Figure 24 shown.

[0261] refer to Figure 24 , Figure 24 A schematic diagram of a process for preparing a power module provided in an embodiment of the present application, combined withFigure 24 As shown in the structural diagram of the power component in the above embodiment, the preparation method includes:

[0262] Step S11: Stack the power module 1 and the capacitor component 2; the capacitor component 2 is connected with a first terminal T1 and a second terminal T2 that are insulated from each other; the first terminal T1 and the second terminal T2 are arranged opposite to each other; the power module 1 includes a plurality of sub-power modules 7; the sub-power module 7 is connected with a third terminal T3 and a fourth terminal T4 that are insulated from each other, and the third terminal T3 and the fourth terminal T4 are arranged opposite to each other; at least two sub-power modules 7 are connected to the same third terminal T3 and the same fourth terminal T4.

[0263] Step S12: Connect the first terminal T1 and the third terminal T3, and connect the second terminal T2 and the fourth terminal T4.

[0264] The preparation method provided by the embodiment of the present application can be used to prepare the power component in the above embodiment, so that a relatively large stacked area is formed between the positive and negative terminals of the capacitor component 2 and between the positive and negative terminals of the power module 1. In the second direction Y, the positive terminal and the negative terminal can achieve 100% or approximately 100% overlap, that is, the vertical projection of the positive terminal on the surface 3 can coincide or approximately coincide with the vertical projection of the negative terminal on the surface 3, thereby reducing the ESL of the entire current loop. At the same time, the terminals can be fixedly connected by welding, and the assembly process is simpler and more convenient.

[0265] In one embodiment, the method of connecting the first terminal T1 and the third terminal T3 and connecting the second terminal T2 and the fourth terminal T4 includes: after connecting the end of the second terminal T2 far from the capacitor component 2 and the end of the fourth terminal T4 far from the power module 1, connect the end of the first terminal T1 far from the capacitor component 2 and the end of the third terminal T3 far from the power module 1. The second terminal T2 and the fourth terminal T4 can be directly connected. The first terminal T1 and the third terminal T3 can be connected through a transfer terminal T5, or the two can be directly connected.

[0266] If the first terminal T1 and the third terminal T3 are directly connected, taking the power component with the Figure 23 shown structure as an example, the principle of connecting the terminals of the capacitor component 2 and the power module 1 can be as shown in Figure 25 and Figure 26 shown.

[0267] Referring to Figure 25 and Figure 26 , Figure 25 and Figure 26 are schematic diagrams of the principle of a terminal connection method according to an embodiment of the present application. The method includes:

[0268] First, as shown in Figure 25 , the capacitor assembly 2 and the power module 1 are stacked and assembled. Before connecting the terminals of the capacitor assembly 2 and the power module 1, as shown in Figure 25 , the second terminal T2 located inside the capacitor assembly 2 is perpendicular to the surface 3. The first terminal T1 outside the capacitor assembly 2 includes a fifth segment terminal T05 and a sixth segment terminal T06. The fifth segment terminal T05 is vertically connected to the surface 3. The sixth segment terminal T06 is connected to one end of the fifth segment terminal T05 facing away from the capacitor assembly 2. The sixth segment terminal T06 is bent outward and has an angle a with the first direction X, and a is less than 90°. Optionally, the value of a can be 70° - 80°. Before connecting the terminals of the capacitor assembly 2 and the power module 1, as shown in Figure 25 , the fourth segment terminal T04 is bent inward and has an angle b with the first segment terminal T01, and b is less than 90°. Optionally, the value of b can be 70° - 80°.

[0269] Then, as shown in Figure 26 , the end of the second terminal T2 away from the capacitor assembly 2 and the end of the fourth terminal T4 away from the power module 1 are connected. Due to the angles a and b, an outward-expanded flared structure can be formed between the fourth segment terminal T04 and the sixth segment terminal T06. This outward-expanded flared structure can serve as a welding window between the third segment terminal T03 and the second terminal T2, facilitating the welding of the third segment terminal T03 and the second terminal T2. Based on the welding window formed by a and b, the second terminal T2 and the fourth terminal T4 are welded and fixed.

[0270] Finally, increase a and b, and make the end of the fourth segment terminal T04 away from the first segment terminal T01 and the end of the sixth segment terminal T06 away from the fifth segment terminal T05 contact each other relatively and be welded and fixed to form a power component with the structure shown in Figure 23 . In this step, after the fourth segment terminal T04 and the sixth segment terminal T06 are relatively fixed at the ends through a tooling, the ends of the two can be connected. Optionally, an adaptation and correction tooling can be used to increase a and b, and make the end of the fourth segment terminal T04 away from the first segment terminal T01 and the end of the sixth segment terminal T06 away from the fifth segment terminal T05 contact each other relatively for welding and fixing.

[0271] For the convenience of illustration, Figure 25 and Figure 26 do not show the insulating part 5. The implementation manner of the insulating part 5 can refer to the previous description, and this implementation manner will not be elaborated here.

[0272] For Figure 25 and Figure 26In the shown manner, in practical applications, if affected by factors such as assembly and sealing, for the scenario where it is not applicable to directly design the sixth-section terminal T06 into an outward-expanded structure, the capacitor component 2 with the structure shown in Figure 27 or Figure 28 can be used to connect the terminals between the capacitor component 2 and the power module 1.

[0273] Refer to Figure 27 , Figure 27 which is a schematic diagram of the terminal structure of a capacitor component before connecting and assembling with a power module. In this method, the first terminal T1 includes a separated fifth-section terminal T05 and a sixth-section terminal T06. After the main body of the capacitor component 2 completes necessary processes such as assembly / potting, then as shown in Figure 27 , the fifth-section terminal T05 and the sixth-section terminal T06 are connected and fixed on the surface 3. Subsequently, as shown in Figure 25 and Figure 26 , corresponding connections are made with the terminals of the power module 1, and a power component with the structure shown in Figure 23 can be formed.

[0274] Refer to Figure 28 , Figure 28 which is a schematic diagram of the terminal structure of another capacitor component before connecting and assembling with a power module. In this method, the first terminal T1 is still an integral structure. Before connecting with the power module 1, as shown by the vertical dotted line in Figure 28 , the first terminal T1 is an integral structure perpendicular to the surface 3. After the main body of the capacitor component 2 completes necessary processes such as assembly / potting, then as shown in Figure 28 , the first terminal T1 is bent into two parts through a calibration tooling 10, and these two parts are respectively the fifth-section terminal T05 and the sixth-section terminal T06. The specific shape and calibration stroke of the calibration tooling 10 can be debugged and designed according to requirements, and the embodiments of the present application do not limit this.

[0275] If the first terminal T1 and the third terminal T3 are connected through a transfer terminal T5, in the previous text, the method of connecting the first terminal T1 and the third terminal T3 and connecting the second terminal T2 and the fourth terminal T4 includes: after connecting the second terminal T2 and the fourth terminal T4, the first terminal T1 and the third terminal T3 are connected using the transfer terminal T5.

[0276] If the first terminal T1 and the third terminal T3 can be connected through a transfer terminal T5 to prepare Figure 21Taking the power component with the structure shown as an example, when connecting between the capacitor component 2 and the terminals of the power module 1, after stacking and assembling the capacitor component 2 and the power module 1, first, the third section terminal T03 and the second terminal T2 are connected in the first overlapping area A1 by laser welding. Then, the adapter terminal T5 is assembled, and by laser welding, the adapter terminal T5 is connected to the first terminal T1 in the second overlapping area A2 and to the fourth section terminal T04 in the third overlapping area A3, so that a power component with the structure as shown in Figure 21 can be formed. Among them, the inner surface of the adapter terminal T5 is covered with an insulating part 5 to facilitate insulation isolation between the second terminal T2 and the fourth terminal T4. When manufacturing Figure 22 the power component with the structure shown, the manufacturing process is the same as that in Figure 21 the corresponding method, and this will not be elaborated in the embodiments of the present application.

[0277] Based on the power component provided in the above embodiments, another embodiment of the present application further provides a power module. The structure of the power module can be as shown in Figure 12 and includes: a plurality of sub-power modules 7, the sub-power modules 7 are connected with relatively insulated third terminals T3 and fourth terminals T4; the third terminals T3 and the fourth terminals T4 are arranged oppositely; at least two sub-power modules 7 are connected to the same third terminal T3 and the same fourth terminal T4.

[0278] In the power module, stacking the third terminal T3 and the fourth terminal T4 oppositely can increase the stacked relative area between the third terminal T3 and the fourth terminal T4. Arranging a plurality of sub-power modules 7 to share the third terminal T3 and the fourth terminal T4 can further increase the stacked relative area of the terminals and reduce the series inductance.

[0279] Based on the above embodiments, the same end 4 of the power module is connected with the third terminal T3 and the fourth terminal T4; the third terminal T3 includes a first section terminal T01 connected to the end 4, and the fourth terminal T4 includes a second section terminal T02 connected to the end 4; the first section terminal T01 and the second section terminal T02 are parallel to the first direction X and are arranged oppositely in the second direction Y; wherein, the second direction Y is perpendicular to the plane where the power module is located, and the first direction is perpendicular to the second direction X. In this way, the power module can at least make the third terminal T3 and the fourth terminal T4 form a relatively large stacked relative area between the first section terminal T01 and the second section terminal T02 to reduce the series inductance between the two.

[0280] Based on the above embodiments, the fourth terminal T4 further includes a third section terminal T03 connected to the second section terminal T02; the third terminal T3 further includes a fourth section terminal T04 connected to the first section terminal T01; both the third section terminal T03 and the fourth section terminal T04 extend along the second direction Y; as shown inFigure 17 , Figure 22 and Figure 23 In any of the ways shown, the third-stage terminal T03 and the fourth-stage terminal T04 are bent toward the same side and are oppositely arranged in the first direction X; or, as shown in Figure 21 shown, the third-stage terminal T03 and the fourth-stage terminal T04 are bent in opposite directions.

[0281] Based on the above embodiments, as shown in Figure 15 shown, at least two sub-power modules 7 share the same substrate 6. This method can be used for the power generation control module 102. Under the condition of meeting the basic current control requirements, the product size in the third direction Z can be reduced by sharing the substrate 6 among multiple sub-power modules 7, so as to reduce the product volume.

[0282] Based on the above embodiments, at least two sub-power modules 7 each have a separate substrate 6, so that each sub-power module can achieve precise current control. This method can be used for the drive control module 101 to facilitate precise control of the drive motor.

[0283] Based on the above embodiments, at least two sub-power modules 7 share the same substrate 6; at least two sub-power modules 7 each have a separate substrate 6. In this method, a part of the sub-power modules 7 in the power module are used for the drive control module 101, and the other part of the sub-power modules 7 are used for the power generation control module 102, which can form a dual-electronic control structure integrating the drive control module 101 and the power generation control module 102, improve the integration degree of the power module, and reduce the product volume.

[0284] Based on the power component provided by the above embodiments, another embodiment of the present application further provides a motor controller, including the power component provided by the above embodiments.

[0285] Based on the motor controller provided by the above embodiments, another embodiment of the present application further provides an electronic control assembly, including the above motor controller.

[0286] Based on the electronic control assembly provided by the above embodiments, another embodiment of the present application further provides a vehicle, and the vehicle includes the electronic control assembly provided by any of the above embodiments.

[0287] In the embodiments of the present application, the vehicle includes an extended-range vehicle, which has independent motor drive requirements and also has independent power generation requirements. To meet these two requirements, in the industry, motor drive (DC to AC) and motor power generation (AC to DC) are often integrated on an electronic control assembly with a dual electronic control structure. In this application scenario, due to the relatively large package volume of the conventional full-bridge module, restricted by the overly large size of the single unit, the size benefit of simply mechanically integrating the drive control module and the power generation control module is low. After integration, the size is very large, and there are also problems such as excessive warping deformation, poor chip soldering processability, and low application reliability, resulting in the two control modules having to be separately and independently packaged. However, the technical solution of the present application can achieve the integrated packaging of the two control modules and solve the above problems.

[0288] In addition, in the conventional technology, there is a large ESL between the positive and negative terminals of the capacitor component and the power module. The technical solution of the present application can increase the overlapping area between the positive and negative terminals, which can greatly reduce the ESL, and thus solve problems such as large switching losses and low efficiency caused by excessive ESL.

[0289] In the embodiments of the present application, the vehicle includes a new energy vehicle, and the new energy vehicle includes an electronic control assembly, so that the vehicle can be driven using electrical energy. The power components in the electronic control assembly can include a drive control module and a power generation control module at the same time. The new energy vehicle uses the electric drive assembly to drive the vehicle using electrical energy. Taking the extended-range new energy vehicle as an example, its topological structure is as Figure 29 shown.

[0290] Reference Figure 29 , Figure 29 is a topological structure diagram of an extended-range new energy vehicle provided by the embodiments of the present application. Figure 29 In it, the solid line represents a mechanical connection, and the dashed line represents an electrical connection.

[0291] As Figure 29 shown, one of the core components of the extended-range new energy vehicle is the range extender 18, which includes: a power generation motor 16 and its connected power generation power component 15; the power generation motor 16 is also connected to the engine 17. The power generation power component 15 is respectively connected to the power battery 14 and the inverter 13. The inverter 13 is connected to the drive motor 12, and the drive motor 12 is connected to the electric drive unit 11. The electric drive unit 11 includes a reducer and a differential.

[0292] Taking the extended-range new energy vehicle as an example, its core component is the range extender 18, and its main function is to start the range extender 18 when the power of the power battery 14 drops to a certain level, and the engine 17 drives the power generation motor 16 to generate electricity. A part of the generated electrical energy can be used to supply the drive motor 12, and the other part can be used to charge the power battery 14.

[0293] Range-extended new energy vehicles have many advantages, including:

[0294] During daily urban commuting, range-extended electric vehicles can run purely on electricity, with zero emissions, reducing tailpipe pollution and meeting environmental protection requirements. At the same time, electric drive is more energy-efficient than fuel drive, reducing energy consumption and usage costs.

[0295] The range-extended electric vehicle is equipped with an engine 17 as a range extender. When the battery power is insufficient, the engine 17 can start to generate electricity to provide continuous power for the vehicle, avoiding the additional problem of range anxiety caused by the limited driving range of pure electric vehicles and making long-distance travel more convenient.

[0296] In addition, range-extended new energy vehicles also have the following advantages in terms of driving experience:

[0297] Pure electric drive: The essence of the range-extended topology is a pure electric drive system. The driving power of the vehicle is completely provided by the drive motor 12. The engine 17 does not directly participate in driving the vehicle but plays the role of generating electricity. It starts when the battery power is insufficient, converts fuel into electricity, powers the drive motor 12 or charges the battery. This pure electric drive method makes the power source of the vehicle single and pure, the same as that of pure electric vehicles, fundamentally ensuring the comfort of the driving experience.

[0298] Quick power response: The characteristics of the drive motor 12 determine that it can output the maximum torque instantaneously. In a vehicle with a range-extended topology, when the driver steps on the accelerator pedal, the drive motor 12 can immediately respond and quickly output strong power to achieve a quick start and acceleration. This instant power response is far superior to traditional fuel vehicles, allowing the driver to feel a more direct and rapid sense of acceleration. Whether it is frequent starts and stops on urban roads or overtaking maneuvers on highways, it can easily handle them, bringing a smooth driving experience.

[0299] No power interruption phenomenon: During the driving process of a range-extended vehicle, since it is always driven by the drive motor, there is no problem of power interruption during gear shifting in traditional fuel vehicles. Whether it is in a low-speed driving state or a high-speed driving state, the power output remains continuous and stable. Even when the battery power is insufficient and the engine starts to generate electricity, the system can ensure through precise control strategies that the power output of the drive motor is not affected and there will be no jerks or power interruptions, thus providing the driver with a consistent stable driving experience and enhancing the comfort and safety of driving.

[0300] The power components of a range-extended new energy vehicle include a power generation motor 16, a drive motor 12, a drive control module, a power generation control module and other components. In the power components of a conventional range-extended new energy vehicle, the drive control module and the power generation control module are two independent components, each having independent power modules (for example, converting between AC and DC through diode semiconductors, IGBT semiconductors, SiC semiconductors, etc.), current sensors, temperature sensors, motor rotor position sensors and other sensors. Their weight, volume and cost are relatively high, and there is an urgent need for optimization.

[0301] In the vehicle provided by the embodiment of the present application, the two control modules can be integrally integrated into the same power component, which can reduce the overall weight and volume of the product, reduce the ESL in the current loop, and improve the performance of the power component.

[0302] Reference Figure 30 , Figure 30 is an equivalent circuit diagram of a power component provided by an embodiment of the present application. The power component includes a drive control module 101 for connecting to the drive motor 12 and a power generation control module 102 for connecting to the power generation motor 16. The drive control module 101 includes a plurality of first sub-power modules 701, and the power generation control module 102 includes a plurality of second sub-power modules 702.

[0303] Both the first sub-power module 701 and the second sub-power module 702 include a half-bridge circuit. The half-bridge circuit includes an upper bridge arm circuit 901 and a lower bridge arm circuit 902. Both the upper bridge arm circuit 901 and the lower bridge arm circuit 902 include a plurality of power chips, and the power chips at least include a first power chip 905 and a second power chip 906. Both the upper bridge arm circuit 901 and the lower bridge arm circuit 902 include the first power chip 905 and the second power chip 906 connected in parallel. The first power chip 905 can be an IGBT (Insulated Gate Bipolar Transistor), and optionally can be a SiC chip. The second power chip 906 can be an FRD (Fast Recovery Diode). The collector of the IGBT is connected to the positive pole of the FRD, and the emitter of the IGBT is connected to the negative pole of the FRD.

[0304] For the first sub-power module 701, both ends of the upper bridge arm circuit 901 are respectively connected to the positive bus 903 and an AC terminal of the drive motor 12, and both ends of the lower bridge arm circuit 902 are respectively connected to the negative bus 904 and an AC terminal of the drive motor 12. In the same first sub-power module 701, the upper bridge arm circuit 901 and the lower bridge arm circuit 902 are connected to the same AC terminal of the drive motor 12. Different first sub-power modules 701 are connected to different AC terminals of the drive motor 12.

[0305] For the second sub-power module 702, two ends of the upper-bridge-arm circuit 901 are respectively connected to the positive bus 903 and an AC terminal of the power generation motor 16, and two ends of the lower-bridge-arm circuit 902 are respectively connected to the negative bus 904 and an AC terminal of the power generation motor 16. In the same second sub-power module 702, the upper-bridge-arm circuit 901 and the lower-bridge-arm circuit 902 are connected to the same AC terminal of the power generation motor 16. Different first sub-power modules 701 are connected to different AC terminals of the power generation motor 16.

[0306] It should be noted that in the embodiments of the present application, the vehicle type is not limited to the range-extended new energy vehicle, and can also be used for other types of vehicles. The embodiments of the present application do not make any limitations in this regard.

[0307] In the description of the embodiments of the present application, the embodiments are described in a progressive, or parallel, or a combination of progressive and parallel manners. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. The embodiments provided by the embodiments of the present application can be combined with each other without conflict.

[0308] It should be noted that in the description of the present application, it should be understood that the descriptions of the drawings and the embodiments are illustrative rather than restrictive. The same reference numerals throughout the embodiments of the specification identify the same structures. Additionally, for the sake of understanding and easy description, some layers, films, panels, regions, etc. may be exaggerated in thickness in the drawings. At the same time, it can be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, the element can be directly on the other element or there may be intermediate elements. Additionally, "on" means positioning the element on or below another element, but does not inherently mean positioning on the upper side of another element according to the direction of gravity.

[0309] The orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present application. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be intermediate components present.

[0310] It should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the article or device comprising the above element.

[0311] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A power component, characterized in that: include: A stacked power module and capacitor assembly; The capacitor assembly is connected with a first terminal and a second terminal insulated from each other; the first terminal and the second terminal are arranged opposite to each other; The power module comprises a plurality of sub-power modules; the sub-power modules are connected with a third terminal and a fourth terminal which are insulated from each other, and the third terminal and the fourth terminal are arranged opposite to each other; at least two of the sub-power modules are connected with the same third terminal and the same fourth terminal; The first terminal is connected to the third terminal, and the second terminal is connected to the fourth terminal.

2. The power component according to claim 1, characterized in that: The first terminal and the second terminal are connected to the surface of the capacitor component facing the power module; the first terminal and the second terminal are arranged opposite to each other in a first direction; The third terminal and the fourth terminal are connected to the same end of the power module; the end faces the first terminal and the second terminal; the third terminal includes a first section terminal connected to the end, and the fourth terminal includes a second section terminal connected to the end; the first section terminal and the second section terminal are parallel to the first direction and are arranged opposite to each other in the second direction; The second direction is parallel to the stacking direction of the power module and the capacitor assembly, and the first direction is perpendicular to the second direction; the first terminal is connected to the third terminal, and the second terminal is connected to the fourth terminal.

3. The power assembly according to claim 2, characterized in that: The vertical projections of the first terminal and the second terminal on a first plane at least partially overlap; the first plane is perpendicular to the first direction; and / or, vertical projections of the third terminal and the fourth terminal on the second plane at least partially overlap; The second plane is perpendicular to the second direction.

4. The power component according to claim 3, characterized in that: The edges of the first terminal and the second terminal on both sides of the second direction meet the flush condition; And / or, edges of the third terminal and the fourth terminal located on both sides of the first direction meet an alignment condition.

5. The power assembly according to claim 4, characterized in that: The offset distance between the edges of the first terminal and the second terminal relative to each other does not exceed 0.2 mm; The misalignment distance between the edges of the third terminal and the fourth terminal relative to each other does not exceed 0.2 mm.

6. The power assembly according to claim 2, characterized in that: The fourth terminal is located between the third terminal and the capacitor component; The second terminal is located between the first terminal and the end portion.

7. The power assembly according to claim 6, characterized in that: The fourth terminal further includes a third section terminal connected to the second section terminal; the third section terminal is parallel to the second direction and extends toward the capacitor component; The third section terminal and the second terminal have a first overlapping area in the first direction, and the third section terminal and the second terminal are connected in the first overlapping area.

8. The power assembly according to claim 7, characterized in that: The third terminal and the first terminal are connected via a transfer terminal.

9. The power assembly according to claim 8, characterized in that: In the first direction, there is a gap between the third terminal and the first terminal exposing the first overlapping area, and the transfer terminal covers the gap.

10. The power assembly according to claim 8, characterized in that: The transfer terminal and the first terminal have a second overlapping area in the first direction, and the transfer terminal is connected to the first terminal in the second overlapping area; The transfer terminal and the third terminal have a third overlapping area, and the transfer terminal and the third terminal are connected in the third overlapping area.

11. The power assembly according to claim 10, characterized in that: The first overlapping area and the second overlapping area do not overlap in the first direction.

12. The power assembly according to claim 11, characterized in that: In the second direction, a distance between the first overlapping region and the capacitor component is greater than a distance between the second overlapping region and the capacitor component.

13. The power assembly according to claim 10, characterized in that: The transfer terminal and the first segment terminal have the third overlapping area in the second direction.

14. The power assembly according to claim 10, characterized in that: The third terminal further includes a fourth section terminal connected to the first section terminal; the fourth section terminal is parallel to the second direction and extends away from the capacitor component; The transfer terminal and the fourth-section terminal have the third overlapping area in the first direction.

15. The power assembly according to claim 10, characterized in that: The third terminal further includes a fourth section terminal connected to the first section terminal; the fourth section terminal is parallel to the second direction and extends toward the capacitor component; The transfer terminal and the fourth-section terminal have the third overlapping area in the first direction.

16. The power assembly according to claim 15, characterized in that: In the second direction, the distance between the third overlapping area and the capacitor component is greater than the distance between the first overlapping area and the capacitor component; and the distance between the second overlapping area and the capacitor component is less than the distance between the first overlapping area and the capacitor component.

17. The power assembly according to claim 6, characterized in that: The fourth terminal further includes a third section terminal connected to the second section terminal; the third terminal further includes a fourth section terminal connected to the first section terminal; the third section terminal and the fourth section terminal both extend away from the capacitor assembly; The fourth section terminal and the first terminal are connected at an end away from the capacitor component to form a first connection area; the third section terminal and the second terminal are connected at an end away from the capacitor component to form a second connection area; in the second direction, the distance between the second connection area and the capacitor component is smaller than the distance between the first connection area and the capacitor component.

18. The power assembly according to claim 17, characterized in that: The fourth section terminal and the first terminal have opposite parts in the first direction; The third section terminal and the second terminal have a first overlapping area in the first direction; the first overlapping area includes an end of the second connection area located in the accommodating space formed by the relative parts.

19. The power assembly according to claim 18, characterized in that: In the opposing portion, the fourth section terminal and the first terminal both protrude toward a side away from the first overlapping region to form the accommodation space.

20. The power component according to any one of claims 7 to 19, characterized in that: In the first direction, the third terminal exposes at least a portion of the third section terminal.

21. The power component according to any one of claims 1 to 20, characterized in that: An insulating member is provided between the first terminal and the second terminal; And / or, an insulating member is provided between the third terminal and the fourth terminal.

22. The power component according to any one of claims 1 to 20, characterized in that: The first terminal and the third terminal are fixedly connected by welding, and the second terminal and the fourth terminal are fixedly connected by welding.

23. The power component according to any one of claims 1 to 20, characterized in that: At least one of the first terminal, the second terminal, the third terminal and the fourth terminal has a thickness of 1 mm to 2 mm.

24. The power component according to any one of claims 1 to 20, characterized in that: The distance between the first terminal and the second terminal is 1.5 mm to 2 mm; And / or, the distance between the third terminal and the fourth terminal is 1.5 mm to 2 mm.

25. The power component according to any one of claims 2 to 20, characterized in that: The first section terminal comprises an integrated first part and a second part, the first part is connected to the end portion, and the second part is located on a side of the first part away from the end portion; wherein the width of the first portion is smaller than the width of the second portion; Alternatively, the width of the first portion is equal to the width of the second portion.

26. The power component according to any one of claims 2 to 20, characterized in that: The first terminal and the second terminal both include an integral third part and a fourth part; in the same terminal, the fourth part is connected to the surface, and the third part is located on a side of the fourth part away from the surface; Wherein, the width of the third portion is smaller than the width of the fourth portion; Alternatively, the width of the third portion is equal to the width of the fourth portion.

27. The power component according to any one of claims 2 to 20, characterized in that: The first section terminal comprises an integrated first part and a second part, the first part is connected to the end portion, and the second part is located on a side of the first part away from the end portion; The first terminal and the second terminal both include an integral third part and a fourth part; in the same terminal, the fourth part is connected to the surface, and the third part is located on a side of the fourth part away from the surface; The width of the first portion is smaller than the width of the second portion, the width of the second portion is equal to the width of the third portion, and the width of the third portion is smaller than the width of the fourth portion.

28. The power component according to any one of claims 1 to 20, characterized in that: The power assembly includes at least one of a drive control module and a power generation control module; the drive control module is used to connect to a drive motor; the power generation control module is used to connect to a power generation motor; Wherein, the driving control module and the power generation control module both include the power module and the capacitor assembly which are stacked.

29. The power assembly according to claim 28, characterized in that: The power assembly includes both the drive control module and the power generation control module; Wherein, the driving control module and the power generation control module share the same capacitor component.

30. The power assembly according to claim 29, characterized in that The first terminal and the third terminal are connected based on a transfer terminal; The power generation control module and the drive control module share the same transfer terminal.

31. The power assembly according to claim 28, characterized in that The sub-power module in the driving control module is a first sub-power module, the driving control module includes a plurality of the first sub-power modules, and each of the first sub-power modules has an independent liner; The sub-power module in the power generation control module is a second sub-power module. The power generation control module includes a plurality of the second sub-power modules, and the second sub-power modules share the same liner.

32. The power assembly according to claim 31, characterized in that The driving control module includes three of the first sub-power modules; and the power generation control module includes three of the second sub-power modules.

33. The power assembly according to claim 28, characterized in that The sub-power module in the driving control module is a first sub-power module, the driving control module includes a plurality of the first sub-power modules, and the first sub-power modules are connected to the same third terminal and the same fourth terminal; The sub-power module in the power generation control module is a second sub-power module, and the power generation control module includes a plurality of the second sub-power modules, and the second sub-power modules are connected to the same third terminal and the same fourth terminal; If the power assembly includes both the driving control module and the power generation control module, the first sub-power module and the second sub-power module are respectively connected to different third terminals and different fourth terminals.

34. A method for preparing a power component according to any one of claims 1 to 33, characterized in that: include: The power module and the capacitor assembly are stacked; the capacitor assembly is connected with a first terminal and a second terminal insulated from each other; the first terminal and the second terminal are arranged oppositely; the power module includes a plurality of sub-power modules; the sub-power modules are connected with a third terminal and a fourth terminal insulated from each other, the third terminal and the fourth terminal are arranged oppositely; at least two of the sub-power modules are connected with the same third terminal and the same fourth terminal; The first terminal and the third terminal are connected, and the second terminal and the fourth terminal are connected.

35. The preparation method according to claim 34, characterized in that: Connecting the first terminal and the third terminal, and connecting the second terminal and the fourth terminal, comprises: After connecting one end of the second terminal away from the capacitor assembly and one end of the fourth terminal away from the power module, connect one end of the first terminal away from the capacitor assembly and one end of the third terminal away from the power module; Alternatively, after the second terminal and the fourth terminal are connected in the first overlapping area, a transfer terminal is used to connect the first terminal and the third terminal.

36. The preparation method according to claim 35, characterized in that: The first terminal and the second terminal are connected to the surface of the capacitor assembly facing the power module; the first terminal and the second terminal are arranged opposite to each other in the first direction; the third terminal and the fourth terminal are connected to the same end of the power module; the end faces the first terminal and the second terminal; the third terminal includes a first section terminal connected to the end, and the fourth terminal includes a second section terminal connected to the end; The first section terminal and the second section terminal are parallel to the first direction and are arranged opposite to each other in the second direction; the second direction is parallel to the stacking direction of the power module and the capacitor assembly, and the first direction is perpendicular to the second direction; the first terminal is connected to the third terminal, and the second terminal is connected to the fourth terminal; The fourth terminal further includes a third section terminal connected to the second section terminal; the third terminal further includes a fourth section terminal connected to the first section terminal; the third section terminal and the fourth section terminal both extend away from the capacitor assembly; the first terminal includes a fifth section terminal and a sixth section terminal, the fifth section terminal is vertically connected to the surface; the sixth section terminal is connected to one end of the fifth section terminal away from the capacitor assembly; The method of connecting the capacitor assembly and the terminal of the power module includes: The sixth section of the terminal is bent toward the outside and has an angle a with the first direction; the fourth terminal is bent toward the inside and has an angle b with the first section of the terminal; a and b are both less than 90°; based on the welding window formed by a and b, the second terminal and the fourth terminal are welded and fixedly connected; After increasing a and b, one end of the fourth section terminal away from the first section terminal and one end of the sixth section terminal away from the fifth section terminal are brought into relative contact and fixed by welding.

37. The preparation method according to claim 36, characterized in that: Before welding the second terminal and the fourth terminal, the angles of a and b are between 70° and 80°.

38. A power module, characterized in that: include: A plurality of sub-power modules, each of which is connected to a relatively insulated third terminal and a fourth terminal; The third terminal and the fourth terminal are arranged opposite to each other; At least two of the sub-power modules are connected to the same third terminal and the same fourth terminal.

39. The power module according to claim 38, characterized in that: The third terminal and the fourth terminal are connected to the same end of the power module; The third terminal includes a first section terminal connected to the end portion, and the fourth terminal includes a second section terminal connected to the end portion; the first section terminal and the second section terminal are parallel to the first direction and are arranged opposite to each other in the second direction; The second direction is perpendicular to the plane where the power module is located, and the first direction is perpendicular to the second direction.

40. The power module according to claim 39, characterized in that: The fourth terminal further includes a third section terminal connected to the second section terminal; the third terminal further includes a fourth section terminal connected to the first section terminal; the third section terminal and the fourth section terminal both extend along the second direction; The third section terminal and the fourth section terminal are bent toward the same side and are arranged opposite to each other in the first direction; or, the third section terminal and the fourth section terminal are bent toward opposite directions.

41. The power module according to any one of claims 38 to 40, characterized in that: At least two of the sub-power modules share the same liner.

42. The power module according to any one of claims 38 to 40, characterized in that: At least two of the sub-power modules each have a separate liner.

43. The power module according to any one of claims 38 to 40, characterized in that: At least two of the sub-power modules share the same liner; At least two of the sub-power modules each have a separate liner.

44. A motor controller, characterized by comprising: a power component as described in any one of claims 1-33.

45. An electronic control assembly, characterized in that: Comprising a motor controller as claimed in claim 44.

46. ​​A vehicle, characterized in that: include: The electronic control assembly as claimed in claim 45.

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