Half-bridge power unit, three-phase full-bridge power unit, motor controller and vehicle

Abstract

The invention provides a half-bridge power unit, a three-phase full-bridge power unit, a motor controller and a vehicle. The half-bridge power unit comprises at least one half-bridge power subunit. Each half-bridge power subunit comprises a group of upper-bridge single tubes and lower-bridge single tubes, and the upper-bridge single tubes and the lower-bridge single tubes are connected in series; wherein the upper bridge single tube and the lower bridge single tube are devices with the same structure, and a source power terminal and a drain power terminal of the devices are located on the surface of the same side. When the single tubes of which the power terminals are all intensively distributed on the same side are arranged and connected in series, the length of a busbar required to be used in a series circuit can be effectively shortened, the parasitic inductance introduced by the busbar is correspondingly reduced along with the reduction of the length of the busbar, and the half-bridge power unit is more stable in power control and more stable in electrical performance. Moreover, it is easy to understand that compared with a single tube with power terminals dispersed on the two sides, the size of the half-bridge power unit can be reduced, the integration level is higher, and the installation space can be saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of power electronics, and in particular relates to a half-bridge power unit, a three-phase full-bridge power unit, a motor controller and a vehicle. Background Art

[0002] In power electronics technology, switch tube power semiconductor devices are widely used in connecting to form half-bridge power units and full-bridge power units.

[0003] In order to improve the working performance of the power unit, multiple power chips are often packaged into modules. The advantage of power modules is their high integration, but their disadvantage is that they are not flexible in applicability to different power occasions. The complex manufacturing process of packaging a large number of chips at a time can easily reduce the yield rate, thereby greatly increasing the cost. Therefore, the industry has also proposed a design scheme that uses multiple power devices with single chips packaged in parallel.

[0004] The terminals of power devices can be divided into surface mount terminals, pin terminals and screw terminals. When these power devices with different terminal types are connected in parallel, in addition to their own inherent defects, their common defect is that the parasitic inductance is large, which affects the stability of power output. Summary of the invention

[0005] In view of this, embodiments of the present invention provide a half-bridge power unit, a three-phase full-bridge power unit, a motor controller and a vehicle to solve the problem of large parasitic inductance in existing power units.

[0006] According to a first aspect of an embodiment of the present invention, a half-bridge power unit is provided, wherein the half-bridge power unit comprises at least one half-bridge power sub-unit;

[0007] Each of the half-bridge power subunits includes a group of upper bridge single tubes and lower bridge single tubes, and the upper bridge single tubes and the lower bridge single tubes are connected in series;

[0008] The upper bridge single tube and the lower bridge single tube are devices of the same structure in which the source power terminal and the drain power terminal are located on the same side surface.

[0009] Optionally, the upper bridge single tube includes a first source power terminal and a first drain power terminal, and the first source power terminal and the first drain power terminal are located on the same side surface of the upper bridge single tube;

[0010] The lower bridge single tube comprises a second source power terminal and a second drain power terminal, and the second source power terminal and the second drain power terminal are located on the same side surface of the lower bridge single tube;

[0011] The first source power terminal and the second drain power terminal are electrically connected and extended to form an AC output terminal, the first drain power terminal is extended to form a DC positive terminal, and the second source power terminal is extended to form a DC negative terminal.

[0012] Optionally, the lead-out direction of the DC positive terminal is in the extension direction of the second drain power terminal.

[0013] Optionally, the lead-out direction of the negative DC terminal is in the extension direction of the second drain power terminal.

[0014] Optionally, the lead-out direction of the AC output terminal is in the extension direction of the second drain power terminal.

[0015] Optionally, the DC positive terminal and the DC negative terminal are located on a first side of the half-bridge power subunit.

[0016] Optionally, the AC output terminal is located at a second side of the half-bridge power subunit, wherein the first side is opposite to the second side.

[0017] Optionally, the source power terminals and drain power terminals of the upper bridge single tube and the lower bridge single tube are arranged in opposite directions.

[0018] Optionally, the half-bridge power unit further includes a first busbar;

[0019] One end of the first busbar is electrically connected to the first drain power terminal, and the other end of the first busbar extends out to form the DC positive terminal.

[0020] Optionally, the other end of the first busbar extends to the opposite side of the first drain power terminal, crosses over the upper bridge single tube and extends out to form the DC positive terminal.

[0021] Optionally, the half-bridge power unit further includes a second busbar;

[0022] One end of the second busbar is electrically connected to the second source power terminal, and the other end of the second busbar extends to form the DC negative terminal.

[0023] Optionally, the other end of the second busbar extends to the same side of the second source power terminal, crosses over the upper bridge single tube and extends out to form the DC negative terminal.

[0024] Optionally, the half-bridge power unit further includes a third busbar;

[0025] One end of the third busbar is electrically connected to the first source power terminal and the second drain power terminal at the same time, and the other end of the third busbar extends to form the AC output terminal.

[0026] Optionally, the other end of the third busbar extends to the same side as the first source power terminal, and crosses over the lower bridge single tube and then extends out to form the AC output terminal.

[0027] Optionally, the first busbar, the second busbar and the third busbar are stacked and insulated from each other.

[0028] Optionally, the source power terminal and the drain power terminal of the upper bridge single tube and the lower bridge single tube are arranged in the same direction.

[0029] Optionally, the half-bridge power unit further includes a fourth busbar;

[0030] One end of the fourth busbar is electrically connected to the first drain power terminal, and the other end of the fourth busbar extends to form the DC positive terminal.

[0031] Optionally, the other end of the fourth busbar extends to the opposite side of the first drain power terminal, crosses over the upper bridge single tube and then extends out to form the DC positive terminal.

[0032] Optionally, the other end of the fourth busbar extends in the extension direction of the first drain power terminal to extend out to form the DC positive terminal.

[0033] Optionally, the half-bridge power unit further includes a fifth busbar;

[0034] One end of the fifth busbar is electrically connected to the second source power terminal, and the other end of the fifth busbar extends to form the DC negative terminal.

[0035] Optionally, the other end of the fifth busbar extends to the opposite side of the second source power terminal, sequentially crossing over the lower bridge single tube and the upper bridge single tube to form the DC negative terminal.

[0036] Optionally, the other end of the fifth busbar extends to the same side as the second source power terminal, crosses over the upper bridge single tube and extends out to form the DC negative terminal.

[0037] Optionally, the half-bridge power unit further includes a sixth busbar;

[0038] One end of the sixth busbar is electrically connected to the first source power terminal and the second drain power terminal at the same time, and the other end of the sixth busbar extends to form the AC output terminal.

[0039] Optionally, the other end of the sixth busbar extends to the same side of the first source power terminal, crosses over the lower bridge single tube and is electrically connected to the second drain power terminal, and then extends out to form the AC output terminal.

[0040] Optionally, one end of the sixth busbar is electrically connected to the first source power terminal, and the other end of the sixth busbar extends to the opposite side of the first source power terminal, crosses the upper bridge single tube to be electrically connected to the second drain power terminal, and then crosses the lower bridge single tube and extends out to form the AC output terminal.

[0041] Optionally, the fourth busbar, the fifth busbar and the sixth busbar are stacked and insulated from each other.

[0042] Optionally, the number of the half-bridge power subunits is at least two, at least two of the half-bridge power subunits are connected in parallel, at least two of the upper bridge single tubes are arranged along a first straight line, and at least two of the lower bridge single tubes are arranged along a second straight line, and the first straight line is parallel to the second straight line.

[0043] Optionally, the half-bridge power unit also includes a DC capacitor, which is arranged at one end of the arrangement direction of a group of the upper bridge single tube and the lower bridge single tube in the half-bridge power sub-unit, the positive electrode of the DC capacitor is electrically connected to the DC positive terminal, and the negative electrode of the DC capacitor is electrically connected to the DC negative terminal.

[0044] Optionally, the upper bridge single tube further includes a first driving gate terminal, and the lower bridge single tube further includes a second driving gate terminal;

[0045] The width of the source power terminal and the drain power terminal of any single tube of the upper bridge single tube and the lower bridge single tube is greater than the width of the corresponding driving gate terminal.

[0046] Optionally, the upper bridge single tube further includes a first driving source terminal, and the lower bridge single tube further includes a second driving source terminal;

[0047] The width of the source power terminal and the drain power terminal of any single tube of the upper bridge single tube and the lower bridge single tube is greater than the width of the corresponding driving source terminal.

[0048] Optionally, the source power terminal and the drain power terminal of any single tube of the upper bridge single tube and the lower bridge single tube extend along a first direction, and the driving source terminal and the driving gate terminal extend along a second direction, and the first direction and the second direction are located in two mutually orthogonal planes.

[0049] A second aspect of the embodiments of the present invention provides a three-phase full-bridge power unit, wherein the three-phase full-bridge power unit includes the half-bridge power unit described in the first aspect of the embodiments of the present invention;

[0050] The number of the half-bridge power units is three, and the three half-bridge power units correspond to three different phase lines of the three-phase alternating current respectively.

[0051] Optionally, the three-phase full-bridge power unit further includes a driving board and a heat dissipation substrate;

[0052] The driving board is arranged above the half-bridge power unit and is electrically connected to the driving terminal of each half-bridge power sub-unit;

[0053] The heat dissipation substrate is arranged below the half-bridge power unit and is sintered and fixed to the bottom of the upper bridge single tube and the lower bridge single tube.

[0054] Optionally, bosses are provided in regions on the heat dissipation substrate corresponding to the upper bridge single tube and the lower bridge single tube, and the bottoms of the upper bridge single tube and the lower bridge single tube are sintered and fixed to the bosses at corresponding positions.

[0055] According to a third aspect of the embodiments of the present invention, a motor controller is provided. The motor controller includes the three-phase full-bridge power unit according to the second aspect of the embodiments of the present invention.

[0056] A fourth aspect of the embodiments of the present invention provides a vehicle, wherein the vehicle comprises the motor controller described in the third aspect of the embodiments of the present invention.

[0057] The half-bridge power unit of the embodiment of the present invention includes at least one half-bridge power sub-unit, each half-bridge power sub-unit includes an upper bridge single tube and a lower bridge single tube, and the upper bridge single tube and the lower bridge single tube are connected in series. Among them, the upper bridge single tube and the lower bridge single tube are the same structural devices with the source power terminal and the drain power terminal located on the same side surface. When the single tube arrangement in which the power terminals are concentrated on the same side is used in series, the length of the busbar required to be used in the series circuit can be effectively shortened. As the length of the busbar decreases, the parasitic inductance introduced by the busbar is also reduced accordingly. The power control of this half-bridge power unit is more stable and the electrical performance is more stable. In addition, it is easy to understand that compared with using a single tube with power terminals dispersed on both sides, the volume size of the half-bridge power unit can be intuitively reduced, the integration is higher, and the installation space can be saved.

[0058] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0060] Figure 1 is a schematic diagram of a device layout of a half-bridge power unit provided by an embodiment of the present invention;

[0061] Figure 2 This is a schematic diagram of an axonometric view of a single tube on an upper bridge provided by an embodiment of the present invention;

[0062] Figure 3 This is a second perspective axonometric diagram of an upper bridge single tube provided by an embodiment of the present invention;

[0063] Figure 4 It is a schematic diagram of the terminal structure of an upper bridge single tube and a lower bridge single tube in a half-bridge power unit provided by an embodiment of the present invention;

[0064] Figure 5 Schematic diagram of the circuit principle of a half-bridge power subunit in an embodiment of the present invention;

[0065] Figure 6 It is a schematic diagram of the distribution positions of the DC positive terminal, the DC negative terminal and the AC output terminal in the second half-bridge power unit provided by an embodiment of the present invention;

[0066] Figure 7 is a top view of the arrangement of the upper bridge single tube and the lower bridge single tube when they are arranged relatively in an embodiment of the present invention;

[0067] Figure 8 This is an axonometric schematic diagram of an embodiment of the present invention in which an upper bridge single tube and a lower bridge single tube are arranged relative to each other;

[0068] Fig. 9 is another axonometric schematic diagram of an embodiment of the present invention in which an upper bridge single tube and a lower bridge single tube are arranged relative to each other;

[0069] Fig.10 Embodiment of the present invention Fig. 9 Schematic cross-sectional view of ;

[0070] Fig.11 is a top view of the arrangement of the upper bridge single tube and the lower bridge single tube when they are arranged in the same direction in an embodiment of the present invention;

[0071] Fig.12 This is an axonometric schematic diagram of an embodiment of the present invention in which the upper bridge single tube and the lower bridge single tube are arranged in the same direction;

[0072] Fig.13 Embodiment of the present invention Fig.12 Schematic cross-sectional view of ;

[0073] Fig.14 is another axonometric schematic diagram of an embodiment of the present invention in which the upper bridge single tube and the lower bridge single tube are arranged in the same direction;

[0074] Fig.15Embodiment of the present invention Fig.14 Schematic cross-sectional view of ;

[0075] Fig.16 is a schematic diagram of a first half-bridge power unit composed of a plurality of half-bridge power sub-units according to an embodiment of the present invention;

[0076] Fig.17 is a schematic diagram of a second half-bridge power unit composed of a plurality of half-bridge power sub-units according to an embodiment of the present invention;

[0077] Fig.18 is a circuit schematic diagram of a plurality of half-bridge power sub-units connected in parallel according to an embodiment of the present invention;

[0078] Fig.19 Schematic diagram of a three-phase full-bridge power unit according to an embodiment of the present invention.

[0079] Description of reference numerals:

[0080] Half-bridge power unit-20, driving board-21, heat dissipation substrate-22, half-bridge power sub-unit-201, upper bridge single tube-2011, lower bridge single tube-2012, first busbar-202, second busbar-203, third busbar-204, fourth busbar-205, fifth busbar-206, sixth busbar-207, first source power terminal-S1, first drain power terminal-D1, first drive gate terminal-G1, first drive source terminal-DS1, second source power terminal-S2, second drain power terminal-D2, second drive gate terminal-G2, second drive source terminal-DS2, DC positive terminal-DC+, DC negative terminal-DC-, AC output terminal-AC_out. DETAILED DESCRIPTION

[0081] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0082] Reference Figures 1 to 3 , an embodiment of the present invention provides a half-bridge power unit 20, wherein the half-bridge power unit 20 includes at least one half-bridge power subunit 201;

[0083] Each of the half-bridge power subunits 201 includes a group of upper bridge single tubes 2011 and lower bridge single tubes 2012, wherein the upper bridge single tubes 2011 and the lower bridge single tubes 2012 are connected in series;

[0084] The upper bridge single tube 2011 and the lower bridge single tube 2012 are devices of the same structure with the source power terminal and the drain power terminal located on the same side surface.

[0085] like Figure 1 , which is a schematic diagram of the device layout of the half-bridge power unit 20 of the embodiment of the present invention, including at least one half-bridge power subunit 201. When the number of half-bridge power subunits 201 increases, the half-bridge power unit 20 may include two or more half-bridge power subunits 201. Each half-bridge power subunit 201 includes a group of upper bridge single tubes 2011 and lower bridge single tubes 2012. The upper bridge single tubes 2011 and lower bridge single tubes 2012 used in the embodiment of the present invention are both power single tube devices that encapsulate multiple SiC chips, are internally insulated, and have source power terminals and drain power terminals located on the same side. Moreover, the upper bridge single tubes 2011 and lower bridge single tubes 2012 may be devices of the same specifications and models.

[0086] like Figure 2 and Figure 3 As shown in the figure, taking the upper bridge single tube 2011 as an example, the structural schematic diagram of the upper bridge single tube 2011 from different angles is given. Figure 2 It can be seen that each power terminal of the upper bridge single tube 2011 is located at the left side I position of the single tube. These power terminals can be copper terminals, which can improve the flow capacity and thermal conductivity. In addition, a heat-conducting layer that can quickly dissipate heat is also provided at the bottom of the upper bridge single tube 2011. The heat-conducting layer is insulated from the inside of the single tube by a ceramic layer and has an excellent thermal conductivity. The structure of the lower bridge single tube 2012 is exactly the same as that of the upper bridge single tube 2011, and will not be described here.

[0087] Combination Figure 1 The layout diagram of the half-bridge power unit 20 shown in the figure shows that when the single tubes with power terminals concentrated on the same side are arranged in series, the problem of needing to cross a long distance when the power terminals are distributed on different sides of the single tube can be avoided, so the length of the busbar required in the series circuit can be effectively shortened. As the length of the busbar decreases, the parasitic inductance introduced by the busbar also decreases accordingly. The power control of this half-bridge power unit is more stable and the electrical performance is more stable. In addition, it is easy to understand that compared with using a single tube with power terminals distributed on both sides, the volume size of the half-bridge power unit can be intuitively reduced, the integration is higher, and the installation space can be saved.

[0088] Optionally, refer to Figure 4 and Figure 5 , the upper bridge single tube 2011 includes a first source power terminal S1 and a first drain power terminal D1, and the first source power terminal S1 and the first drain power terminal D1 are located on the same side surface of the upper bridge single tube 2011;

[0089] The lower bridge single tube 2012 includes a second source power terminal S2 and a second drain power terminal D2, and the second source power terminal S2 and the second drain power terminal D2 are located on the same side surface of the lower bridge single tube 2012;

[0090] The first source power terminal S1 and the second drain power terminal D2 are electrically connected and extended to form an AC output terminal AC_out. The first drain power terminal D1 is extended to form a DC positive terminal DC+. The second source power terminal S2 is extended to form a DC negative terminal DC-.

[0091] Specifically, if Figure 4 As shown, the power terminals of the upper bridge single tube 2011 include a first source power terminal S1 and a first drain power terminal D1 located on the same side surface, and the power terminals of the lower bridge single tube 2012 include a second source power terminal S2 and a second drain power terminal D2 located on the same side surface. Figure 5 As shown in the figure, the series connection of the upper bridge single tube 2011 and the lower bridge single tube 2012 can be realized by electrically connecting the first source power terminal S1 and the second drain power terminal D2 together, and the node where the first source power terminal S1 and the second drain power terminal D2 meet extends to form an AC output terminal AC_out, and the AC output terminal AC_out can be used to electrically connect to a load device. Then, the remaining first drain power terminal D1 on the upper bridge single tube 2011 extends to form a DC positive terminal DC+, and the remaining second source power terminal S2 on the lower bridge single tube 2012 extends to form a DC negative terminal DC-, and the DC positive terminal DC+ and the DC negative terminal DC- can be used to electrically connect to a DC capacitor.

[0092] Optionally, refer to Figure 5 and Figure 6 The lead-out direction of the DC positive terminal DC+ is in the extension direction of the second drain power terminal D2.

[0093] Specifically, in Figure 5 Based on the schematic diagram of the device connection circuit principle shown, no matter which orientation the upper bridge single tube 2011 and the lower bridge single tube 2012 are arranged, Figure 6As shown in the figure, the lead-out direction of the DC positive terminal DC+ can be designed to be located in the extension direction of the second drain power terminal D2. When the lead-out direction is the same as the direction of the end of the second drain power terminal D2, it is led out along the +y direction shown in the figure. When the lead-out direction is opposite to the direction of the end of the second drain power terminal D2, it is led out along the -y direction shown in the figure. Along the y direction, the two are parallel to each other and can even overlap. Thereby, it helps to keep the busbar forming the DC positive terminal DC+ straight, which is beneficial to shorten the length of the busbar. It should be noted that in the embodiment of the present invention, in addition to using the extension direction of the second drain power terminal D2 as the reference datum for the lead-out direction of the DC positive terminal DC+, since the power terminals on the same single tube are all located on the same side surface, the extension direction of the second source power terminal S2 can also be used as a reference datum, and the lead-out direction of the DC positive terminal DC+ can also be in the extension direction of the second source power terminal S2, which will not be described in detail here.

[0094] Optionally, refer to Figure 5 The lead-out direction of the DC negative terminal DC- is in the extension direction of the second drain power terminal D2.

[0095] Specifically, in Figure 5 Based on the schematic diagram of the device connection circuit principle shown, no matter which orientation the upper bridge single tube 2011 and the lower bridge single tube 2012 are arranged, Figure 6 As shown in the figure, the lead-out direction of the DC negative terminal DC- can be designed to be located in the extension direction of the second drain power terminal D2. When the lead-out direction is the same as the direction of the end of the second drain power terminal D2, it is led out along the +y direction shown in the figure. When the lead-out direction is opposite to the direction of the end of the second drain power terminal D2, it is led out along the -y direction shown in the figure. Along the y direction, the two are parallel to each other and can even overlap. Thereby, it helps to keep the busbar forming the DC negative terminal DC- straight, which is beneficial to shorten the length of the busbar. It should be noted that in the embodiment of the present invention, in addition to using the extension direction of the second drain power terminal D2 as the reference datum for the lead-out direction of the DC negative terminal DC-, since the power terminals on the same single tube are all located on the same side surface, the extension direction of the second source power terminal S2 can also be used as a reference datum, and the lead-out direction of the DC negative terminal DC- can also be in the extension direction of the second source power terminal S2, which will not be described in detail here.

[0096] Optionally, refer to Figure 5 , the lead-out direction of the AC output terminal AC_out is in the extending direction of the second drain power terminal D2.

[0097] Specifically, in Figure 5 Based on the schematic diagram of the device connection circuit principle shown, no matter which orientation the upper bridge single tube 2011 and the lower bridge single tube 2012 are arranged, Figure 6 As shown in the figure, the lead-out direction of the AC output terminal AC_out can be designed to be located in the extension direction of the second drain power terminal D2. When the lead-out direction is the same as the direction of the end of the second drain power terminal D2, it is led out along the +y direction shown in the figure. When the lead-out direction is opposite to the direction of the end of the second drain power terminal D2, it is led out along the -y direction shown in the figure. Along the y direction, the two are parallel to each other and can even overlap. Thereby, it helps to keep the busbar forming the AC output terminal AC_out straight, which is beneficial to shorten the length of the busbar. It should be noted that in the embodiment of the present invention, in addition to using the extension direction of the second drain power terminal D2 as the reference datum for the lead-out direction of the AC output terminal AC_out, since the power terminals on the same single tube are all located on the same side surface, the extension direction of the second source power terminal S2 can also be used as a reference datum, and the lead-out direction of the AC output terminal AC_out can also be in the extension direction of the second source power terminal S2, which will not be described in detail here.

[0098] Optionally, refer to Figure 6 The DC positive terminal DC+ and the DC negative terminal DC- are located on a first side of the half-bridge power subunit 201 .

[0099] Specifically, if Figure 6 As shown in FIG. 2 , after the upper bridge single tube 2011 and the lower bridge single tube 2012 are electrically connected to lead out the DC positive terminal DC+ and the DC negative terminal DC-, the DC positive terminal DC+ and the DC negative terminal DC- can be designed to be located on the same side of the half-bridge power subunit 201, for example, both located at Figure 6 As shown in the diagram below, the DC terminals with positive and negative poles on the same side can reduce the difficulty in connecting the DC capacitors and make the layout of the DC capacitors more convenient.

[0100] Optionally, refer to Figure 6 , the AC output terminal AC_out is located at a second side of the half-bridge power subunit 201 , wherein the first side is opposite to the second side.

[0101] Specifically, if Figure 6 The DC positive terminal DC+ and the DC negative terminal DC- are both located at Figure 6 The lower side of the half-bridge power subunit 201 is shown, and accordingly, the AC output terminal AC_out lead-out position can be designed to be on the upper side of the half-bridge power subunit 201. In this structure, after the space below the half-bridge power subunit 201 is occupied by the DC capacitor, the space above the half-bridge power subunit 201 can be used to connect and arrange load devices on the opposite side of the DC capacitor, which can make the layout of circuit devices more flexible and simple, and make full use of the space around the half-bridge power subunit 201.

[0102] Optionally, refer to Figure 7 The source power terminals and drain power terminals of the upper bridge single tube 2011 and the lower bridge single tube 2012 are arranged in opposite directions.

[0103] Specifically, in one embodiment, the following can be used: Figure 7 The schematic arrangement makes the source power terminals and drain power terminals of the upper bridge single tube 2011 and the lower bridge single tube 2012 face each other. Figure 7 As shown in the figure, at this time, the upper bridge single tube 2011 and the lower bridge single tube 2012 are in a face-to-face position relationship, the first drain power terminal D1 and the second source power terminal S2 are opposite, and the second drain power terminal D2 and the first source power terminal S1 are opposite.

[0104] Optionally, refer to Figures 8 to 10 , the half-bridge power unit 20 further includes a first busbar 202;

[0105] One end of the first busbar 202 is electrically connected to the first drain power terminal D1 , and the other end of the first busbar 202 extends to form the DC positive terminal DC+.

[0106] Specifically, the half-bridge power unit 20 of the embodiment of the present invention may also include: Figures 8 to 10 The first busbar 202 shown may be a conductive sheet with a protruding connection portion made by stamping and bending a copper sheet. The connection portion at one end of the first busbar 202 is electrically connected to the first drain power terminal D1, and the other end extends from the half-bridge power unit 20 to form a DC positive terminal DC+. The thin sheet-shaped first busbar 202 can reduce the space occupied by the positive connection structure and provide a larger flow area.

[0107] Optionally, refer to Figures 8 to 10 The other end of the first busbar 202 extends to the opposite side of the first drain power terminal D1, crosses the upper bridge single tube 2011 and extends out to form the DC positive terminal DC+.

[0108] Specifically, combined Figures 8 to 10 In one embodiment, when the first busbar 202 is used for connection, after the first end of the first busbar 202 is welded and fixed to the first drain power terminal D1, the second end of the first busbar 202 extends in the opposite direction toward the opposite side of the first drain power terminal D1 along the -y direction shown in the figure until it crosses the upper bridge single tube 2011, and then extends from the edge of the upper bridge single tube 2011 to form a DC positive terminal DC+ exposed outside the half-bridge power unit 20. It can be seen that the span of the first busbar 202 is the size of the upper bridge single tube 2011 in the y direction.

[0109] Optionally, refer to Figures 8 to 10 , the half-bridge power unit also includes a second busbar 203;

[0110] One end of the second busbar 203 is electrically connected to the second source power terminal S2 , and the other end of the second busbar 203 extends to form the DC negative terminal DC−.

[0111] Specifically, the half-bridge power unit 20 of the embodiment of the present invention may also include: Figures 8 to 10 The second busbar 203 shown in the figure can be a conductive sheet with a protruding connection portion made by stamping and bending a copper sheet. The connection portion at one end of the second busbar 203 is electrically connected to the second source power terminal S2, and the other end extends from the half-bridge power unit 20 to be exposed to the outside to form a DC negative terminal DC-. The thin sheet-shaped second busbar 203 can not only reduce the space occupied by the negative electrode connection structure, but also provide a larger current flow area.

[0112] Optionally, refer to Figures 8 to 10 The other end of the second busbar 203 extends to the same side of the second source power terminal S2, crosses over the upper bridge single tube 2011 and extends out to form the DC negative terminal DC-.

[0113] Specifically, combined Figures 8 to 10 As shown in the figure, in one embodiment, when the second busbar 203 is used for connection, after the first end of the second busbar 203 is welded and fixed to the second source power terminal S2, the second end of the second busbar 203 extends along the -y direction shown in the figure, toward the same side direction of the second source power terminal S2, until it crosses the upper bridge single tube 2011, and then extends from the edge of the upper bridge single tube 2011 to form a DC negative terminal DC- exposed outside the half-bridge power unit 20. It can be seen that the span of this second busbar 203 is also the size of the upper bridge single tube 2011 in the y direction.

[0114] Optionally, refer to Figures 8 to 10 , the half-bridge power unit further includes a third busbar 204;

[0115] One end of the third busbar 204 is electrically connected to the first source power terminal S1 and the second drain power terminal D2 at the same time, and the other end of the third busbar 204 extends out to form the AC output terminal AC_out.

[0116] Specifically, the half-bridge power unit 20 of the embodiment of the present invention may also include: Figures 8 to 10The third busbar 204 shown may be a conductive sheet with a protruding connection portion made by stamping and bending a copper sheet. The connection portion at one end of the third busbar 204 is electrically connected to the first source power terminal S1 and the second drain power terminal D2 at the same time, and the other end extends from the half-bridge power unit 20 to be exposed to the outside to form an AC output terminal AC_out. The thin sheet-shaped third busbar 204 can reduce the space occupied by the output connection structure and provide a larger current flow area.

[0117] Optionally, refer to Figures 8 to 10 The other end of the third busbar 204 extends to the same side of the first source power terminal S1 and crosses over the lower bridge single tube 2012 to form the AC output terminal AC_out.

[0118] Specifically, combined Figures 8 to 10 In one embodiment, when the third busbar 204 is used for connection, after the connection portion of the first end of the third busbar 204 is welded and fixed to the first source power terminal S1 and the second drain power terminal D2 at the same time, the second end of the third busbar 204 extends along the +y direction shown in the figure, toward the same side direction of the first source power terminal S1, until it crosses the lower bridge single tube 2012, and then extends from the edge of the lower bridge single tube 2012 to form an AC output terminal AC_out exposed outside the half-bridge power unit 20. It can be seen that the span of this third busbar 204 is the size of the lower bridge single tube 2012 in the y direction.

[0119] Optionally, refer to Figures 8 to 10 The first busbar 202, the second busbar 203 and the third busbar 204 are stacked and insulated from each other.

[0120] Specifically, combined Figures 8 to 10 As shown in the figure, the first busbar 202, the second busbar 203 and the third busbar 204 are stacked together, and an insulating layer is provided between the two adjacent layers of busbars to avoid short circuits between power terminals. It is easy to understand that in the area near the power terminals, each busbar is designed with a gap or slot to avoid structural interference.

[0121] Optionally, refer to Fig.11 The source power terminal and the drain power terminal of the upper bridge single tube 2011 and the lower bridge single tube 2012 are arranged in the same direction.

[0122] Specifically, in one embodiment, the following can be used: Fig.11 The schematic arrangement makes the source power terminal and the drain power terminal of the upper bridge single tube 2011 and the lower bridge single tube 2012 face the same direction. Fig.11As shown in the figure, the source power terminal and the drain power terminal of the upper bridge single tube 2011 and the lower bridge single tube 2012 both point to the +y direction of the figure. At this time, the upper bridge single tube 2011 and the lower bridge single tube 2012 are in a head-to-tail position relationship, the first drain power terminal D1 and the second drain power terminal D2 are distributed along the same straight line, and the first source power terminal S1 and the second source power terminal S2 are distributed along the same straight line.

[0123] Optionally, refer to Figures 12 to 15 , the half-bridge power unit 20 also includes a fourth busbar 205;

[0124] One end of the fourth busbar 205 is electrically connected to the first drain power terminal D1 , and the other end of the fourth busbar 205 extends to form the DC positive terminal DC+.

[0125] Specifically, in the embodiment of the present invention, when the upper bridge single tube 2011 and the lower bridge single tube 2012 are arranged in the same direction, the half-bridge power unit 20 may further include: Figures 12 to 15 The fourth busbar 205 shown may be a conductive sheet with a protruding connection portion made by stamping and bending a copper sheet. The connection portion at one end of the fourth busbar 205 is electrically connected to the first drain power terminal D1, and the other end extends from the half-bridge power unit 20 to be exposed to the outside to form a DC positive terminal DC+. The thin sheet-like fourth busbar 205 can reduce the space occupied by the positive connection structure and provide a larger flow area.

[0126] Optionally, refer to Fig.12 and Fig.13 The other end of the fourth busbar 205 extends to the opposite side of the first drain power terminal D1, crosses the upper bridge single tube 2011 and then extends out to form the DC positive terminal DC+.

[0127] Specifically, combined Figures 12 to 13 In one embodiment, when the fourth busbar 205 is used for connection, after the first end of the fourth busbar 205 is welded and fixed to the first drain power terminal D1, the second end of the fourth busbar 205 extends in the opposite direction toward the opposite side of the first drain power terminal D1 along the -y direction shown in the figure until it crosses the upper bridge single tube 2011, and then extends from the edge of the upper bridge single tube 2011 to form a DC positive terminal DC+ exposed outside the half-bridge power unit 20. It can be seen that the span of the fourth busbar 205 is the size of the upper bridge single tube 2011 in the y direction.

[0128] Optionally, refer to Fig.14 and Fig.15 The other end of the fourth busbar 205 extends in the extension direction of the first drain power terminal D1 to extend to form the DC positive terminal DC+.

[0129] Specifically, combined Figure 14 to Figure 15 In one embodiment, when the fourth busbar 205 is used for connection, since the first drain power terminal D1 is already located at the edge of the half-bridge power subunit 201, at this time, after the first end of the fourth busbar 205 is welded and fixed to the first drain power terminal D1, the first end of the fourth busbar 205 just extends in the extension direction of the first drain power terminal D1, that is, extends along the +y direction shown in the figure, thereby forming a DC positive terminal DC+ exposed outside the half-bridge power unit 20. It can be seen that this fourth busbar 205 does not need to cross any single tube, and the structural size can be more compact.

[0130] Optionally, refer to Figures 12 to 15 , the half-bridge power unit 20 further includes a fifth busbar 206;

[0131] One end of the fifth busbar 206 is electrically connected to the second source power terminal S2 , and the other end of the fifth busbar 206 extends to form the DC negative terminal DC−.

[0132] Specifically, in the embodiment of the present invention, when the upper bridge single tube 2011 and the lower bridge single tube 2012 are arranged in the same direction, the half-bridge power unit 20 may further include: Figures 12 to 15 The fifth busbar 206 shown may be a conductive sheet with a protruding connection portion made by stamping and bending a copper sheet. The connection portion at one end of the fifth busbar 206 is electrically connected to the second source power terminal S2, and the other end extends from the half-bridge power unit 20 to be exposed to the outside to form a DC negative terminal DC-. The thin sheet-shaped fifth busbar 206 can reduce the space occupied by the negative electrode connection structure and provide a larger current flow area.

[0133] Optionally, refer to Fig.12 and Fig.13 The other end of the fifth busbar 206 extends to the opposite side of the second source power terminal S2, and sequentially crosses the lower bridge single tube 2012 and the upper bridge single tube 2011 to form the DC negative terminal DC-.

[0134] Specifically, combined Figures 12 to 13As shown in the figure, in one embodiment, when the fifth busbar 206 is used for connection, after the first end of the fifth busbar 206 is welded and fixed to the second source power terminal S2, the second end of the fifth busbar 206 extends in the opposite direction toward the opposite side of the second source power terminal S2 along the -y direction shown in the figure, sequentially crossing the lower bridge single tube 2012 and the upper bridge single tube 2011, and then extending from the edge of the upper bridge single tube 2011 to form a DC negative terminal DC- exposed outside the half-bridge power unit 20. It can be seen that the span of this fifth busbar 206 is the sum of the dimensions of the upper bridge single tube 2011 and the lower bridge single tube 2012 in the y direction.

[0135] Optionally, refer to Fig.14 and Fig.15 The other end of the fifth busbar 206 extends to the same side of the second source power terminal S2, crosses over the upper bridge single tube 2011 and extends to form the DC negative terminal DC-.

[0136] Specifically, combined Figure 14 to Figure 15 As shown in the figure, in one embodiment, when the fifth busbar 206 is used for connection, after the first end of the fifth busbar 206 is welded and fixed to the second source power terminal S2, the second end of the fifth busbar 206 extends along the +y direction shown in the figure to the same side of the second source power terminal S2 until it crosses the upper bridge single tube 2011, and then emerges from the edge of the upper bridge single tube 2011 to form a DC negative terminal DC- exposed outside the half-bridge power unit 20. It can be seen that the span of this fifth busbar 206 is the size of the upper bridge single tube 2011 in the y direction.

[0137] Optionally, refer to Figures 12 to 15 , the half-bridge power unit further includes a sixth busbar 207;

[0138] One end of the sixth busbar 207 is electrically connected to the first source power terminal S1 and the second drain power terminal D2 at the same time, and the other end of the sixth busbar 207 extends out to form the AC output terminal AC_out.

[0139] Specifically, in the embodiment of the present invention, when the upper bridge single tube 2011 and the lower bridge single tube 2012 are arranged in the same direction, the half-bridge power unit 20 may further include: Figures 12 to 15 The sixth busbar 207 shown may be a conductive sheet with a protruding connection portion made by stamping and bending a copper sheet. The connection portion at one end of the sixth busbar 207 is electrically connected to the first source power terminal S1 and the second drain power terminal D2 at the same time, and the other end extends from the half-bridge power unit 20 to be exposed to the outside to form an AC output terminal AC_out. The thin sheet-like sixth busbar 207 can reduce the space occupied by the output connection structure and provide a larger current flow area.

[0140] Optionally, refer to Fig.12 and Fig.13 The other end of the sixth busbar 207 extends to the same side of the first source power terminal S1, crosses the lower bridge single tube 2012, is electrically connected to the second drain power terminal D2, and then extends out to form the AC output terminal AC_out.

[0141] Specifically, combined Figures 12 to 13 In one embodiment, when the sixth busbar 207 is used for connection, after the first end of the sixth busbar 207 is welded and fixed to the first source power terminal S1, the second end of the sixth busbar 207 extends along the +y direction shown in the figure, toward the same side of the first source power terminal S1, until it crosses the lower bridge single tube 2012, and is electrically connected to the second drain power terminal D2 at the edge of the lower bridge single tube 2012, and then extends to form the AC output terminal AC_out. It can be seen that the span of this sixth busbar 207 is the size of the lower bridge single tube 2012 in the y direction.

[0142] Optionally, refer to Fig.14 and Fig.15 One end of the sixth busbar 207 is electrically connected to the first source power terminal S1, and the other end of the sixth busbar 207 extends to the opposite side of the first source power terminal S1, crosses the upper bridge single tube 2011 and is electrically connected to the second drain power terminal D2, and then crosses the lower bridge single tube 2012 and extends out to form the AC output terminal AC_out.

[0143] Specifically, combined Figures 14 to 15 In one embodiment, when the sixth busbar 207 is used for connection, after the first end of the sixth busbar 207 is welded and fixed to the first source power terminal S1, the second end of the sixth busbar 207 extends in the opposite direction toward the opposite side of the first source power terminal S1 along the -y direction shown in the figure, until it crosses the upper bridge single tube 2011, and then is electrically connected to the second drain power terminal D2 between the upper bridge single tube 2011 and the lower bridge single tube 2012, and then continues to extend across the lower bridge single tube 2012 and extends out to form the AC output terminal AC_out. It can be seen that the span of this sixth busbar 207 is the sum of the dimensions of the upper bridge single tube 2011 and the lower bridge single tube 2012 in the y direction.

[0144] Optionally, refer to Figures 12 to 15 The fourth busbar 205, the fifth busbar 206 and the sixth busbar 207 are stacked and insulated from each other.

[0145] Specifically, combined Figures 12 to 15As shown in the figure, the fourth busbar 205, the fifth busbar 206 and the sixth busbar 207 are stacked together, and an insulating layer is provided between the two adjacent layers of busbars to avoid short circuits between power terminals. It is easy to understand that in the parts near the power terminals, each busbar is designed with a gap or slot to avoid each other to avoid structural interference.

[0146] Optionally, refer to Figures 16 to 18 The number of the half-bridge power subunits 201 is at least two, at least two of the half-bridge power subunits 201 are connected in parallel, at least two of the upper bridge single tubes 2011 are arranged along a first straight line, and at least two of the lower bridge single tubes are arranged along a second straight line, and the first straight line is parallel to the second straight line.

[0147] Specifically, if Fig.16 and Fig.17 As shown in FIG. 1 , whether the upper bridge single tube 2011 and the lower bridge single tube 2012 are arranged relative to each other or in the same direction, when the number of the half-bridge power subunits 201 is two or more, the upper bridge single tube 2011 and the lower bridge single tube 2012 can be arranged in the same direction. Fig.16 or Fig.17 As shown in FIG. 1 , at least two upper bridge single tubes 2011 are arranged along a first straight line L1, at least two lower bridge single tubes 2012 are arranged along a second straight line L2, and the upper bridge single tubes 2011 and the lower bridge single tubes 2012 aligned in the upper and lower positions are arranged according to Figure 5 After the half-bridge power sub-unit 201 is formed in series, the adjacent half-bridge power sub-units 201 are connected in series according to Fig.18 , thereby forming a half-bridge power unit 20 suitable for high power requirements. In this half-bridge power unit 20, more busbars will be used for connection accordingly. Due to the aforementioned arrangement and connection method, the total parasitic inductance introduced by multiple busbars will decrease as the number of parallel single tubes increases, and the busbar current capacity will increase as the number of parallel single tubes increases. Therefore, this half-bridge power unit 20 has a higher current expansion capacity.

[0148] Optionally, the half-bridge power unit 20 also includes a DC capacitor, which is arranged at one end of a group of the upper bridge single tube 2011 and the lower bridge single tube 2012 in the half-bridge power sub-unit 201, the positive electrode of the DC capacitor is electrically connected to the DC positive terminal DC+, and the negative electrode of the DC capacitor is electrically connected to the DC negative terminal DC-.

[0149] Specifically, for the aforementioned Figures 7 to 15 In the three types of half-bridge power units 20 shown, a DC capacitor can also be connected to one end of the arrangement direction of the upper bridge single tube 2011 and the lower bridge single tube 2012 in the corresponding half-bridge power sub-unit 201. Fig.10In this half-bridge power unit 20, the DC capacitor can be connected on the -y direction side. Fig.13 In this half-bridge power unit 20, the DC capacitor can be connected on the -y direction side. Fig.15 In this half-bridge power unit 20, the DC capacitor can be connected on the +y direction side. Combining the top views of the three half-bridge power units 20, it is easy to understand that when the DC capacitor is arranged along the y direction, the distance between each single tube and the DC capacitor is basically the same, and they have the same commutation inductance, so there will be no dynamic uneven current problem.

[0150] Optionally, refer to Figure 4 , the upper bridge single tube 2011 further includes a first driving gate terminal G1, and the lower bridge single tube 2012 further includes a second driving gate terminal G2;

[0151] The width of the source power terminal and the drain power terminal of any single tube of the upper bridge single tube 2011 and the lower bridge single tube 2012 is greater than the width of the corresponding driving gate terminal.

[0152] Specifically, if Figure 4 As shown in the figure, for the upper bridge single tube 2011, it also includes a first driving gate terminal G1, and the widths of the first source power terminal S1 and the first drain power terminal D1 are both greater than the width of the first driving gate terminal G1, and are in the shape of a rectangular sheet, which can provide a more sufficient welding overlap area. This upper bridge single tube 2011 can be suitable for using a laser welding process to melt and weld the power terminal of the single tube and the busbar into one, and the mechanical connection stability and electrical performance are better.

[0153] Similar to the upper bridge single tube 2011, the lower bridge single tube 2012 also includes a second driving gate terminal G2. The widths of the second source power terminal S2 and the second drain power terminal D2 are both greater than the width of the second driving gate terminal G2. They are shaped like rectangular sheets, which can provide a more sufficient welding overlap area. This lower bridge single tube 2012 can be used to use a laser welding process to melt and weld the power terminal of the single tube to the busbar into one, and the mechanical connection stability and electrical performance are better.

[0154] Optionally, refer to Figure 4 , the upper bridge single tube 2011 further includes a first driving source terminal DS1, and the lower bridge single tube 2012 further includes a second driving source terminal DS2;

[0155] The width of the source power terminal and the drain power terminal of any single tube of the upper bridge single tube 2011 and the lower bridge single tube 2012 is greater than the width of the corresponding driving source terminal.

[0156] Specifically, if Figure 4As shown in the figure, in some devices, the upper bridge single tube 2011 used also includes a first driving source terminal DS1, the width of the first source power terminal S1 and the first drain power terminal D1 are both larger than the width of the first driving source terminal DS1, and the shape is a rectangular sheet, which can provide a more sufficient welding overlap area. This upper bridge single tube 2011 can be suitable for using a laser welding process to melt and weld the power terminal of the single tube and the busbar into one, and the mechanical connection stability and electrical performance are better.

[0157] Similar to the upper bridge single tube 2011, the lower bridge single tube 2012 also includes a second driving source terminal DS2. The widths of the second source power terminal S2 and the second drain power terminal D2 are both greater than the width of the second driving source terminal DS2. They are shaped like rectangular sheets, which can provide a more sufficient welding overlap area. This lower bridge single tube 2012 is suitable for using a laser welding process to melt and weld the power terminal of the single tube to the busbar into one, and the mechanical connection stability and electrical performance are better.

[0158] Optionally, refer to Figure 4 The source power terminal and the drain power terminal of any single tube of the upper bridge single tube 2011 and the lower bridge single tube 2012 extend along the first direction, and the driving source terminal and the driving gate terminal extend along the second direction. The first direction and the second direction are located in two mutually orthogonal planes.

[0159] Specifically, if Figure 4 Taking the upper bridge single tube 2011 as an example, in the upper bridge single tube 2011 of the embodiment of the present invention, the first source power terminal S1 and the first drain power terminal D1 extend along the first direction +y, and the first driving source terminal DS1 and the first driving gate terminal G1 extend along the second direction +z, which is more convenient for the stacking of the busbars and can avoid the half-bridge power unit 20 occupying too much area in the horizontal plane. The lower bridge single tube 2012 has the same structure as the upper bridge single tube 2011, and will not be described here.

[0160] Reference Fig.19 , the embodiment of the present invention further provides a three-phase full-bridge power unit, the three-phase full-bridge power unit includes any of the aforementioned half-bridge power units 20;

[0161] The number of the half-bridge power units 20 is three, and the three half-bridge power units 20 correspond to three different phase lines of the three-phase alternating current respectively.

[0162] Specifically, if Fig.19As shown in the figure, in the embodiment of the present invention, the three half-bridge power units 20 mentioned above can be integrated together to form a three-phase full-bridge power unit matching the three-phase alternating current, and the AC output terminal AC_out of each half-bridge power unit 20 corresponds to three different phase lines of the three-phase alternating current, namely, the U phase, the V phase and the W phase, thereby improving the stability of the three-phase alternating current control process.

[0163] Optionally, refer to Fig.19 , the three-phase full-bridge power unit also includes a driving board 21 and a heat dissipation substrate 22;

[0164] The driving board 21 is disposed above the half-bridge power unit 20 and is electrically connected to the driving terminal of each half-bridge power sub-unit 201;

[0165] The heat dissipation substrate 22 is disposed below the half-bridge power unit 20 and is sintered and fixed to the bottom of the upper bridge single tube 2011 and the lower bridge single tube 2012 .

[0166] Specifically, if Fig.19 As shown in the diagram, in the embodiment of the present invention, in the three-phase full-bridge power unit, the driving board 21 can be arranged above the half-bridge power unit 20 and electrically connected to the driving terminal of the half-bridge power sub-unit 201, and the heat dissipation substrate 22 can be arranged below the half-bridge power unit 20 and sintered and fixed to the bottom of the upper bridge single tube 2011 and the lower bridge single tube 2012, thereby helping to improve the heat dissipation performance.

[0167] Optionally, bosses are provided on the heat dissipation substrate 22 in areas corresponding to the upper bridge single tube 2011 and the lower bridge single tube 2012 , and the bottoms of the upper bridge single tube 2011 and the lower bridge single tube 2012 are sintered and fixed to the bosses at corresponding positions.

[0168] Specifically, in an embodiment of the present invention, according to the creepage distance determined by the circuit design calculation results, bosses can be set on the heat dissipation substrate 22 in the areas corresponding to the upper bridge single tube 2011 and the lower bridge single tube 2012, and the height size of the bosses can be used to control the creepage distance between the upper bridge single tube 2011, the lower bridge single tube 2012 and the driving board 21 to meet the design requirements.

[0169] An embodiment of the present invention further provides a motor controller, which includes any one of the aforementioned three-phase full-bridge power units.

[0170] By applying the above three-phase full-bridge power unit to a motor controller, that is, an inverter, the smoothness of the motor operation can be improved.

[0171] The embodiment of the present invention further provides a vehicle, the vehicle comprising the aforementioned motor controller. By using the aforementioned motor controller in the vehicle, it is helpful to improve the driving comfort of the vehicle and improve the driving experience.

[0172] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0173] It is easy for a person skilled in the art to think that any combination of the above embodiments is feasible, so any combination of the above embodiments is an implementation scheme of the present invention. However, due to space limitations, this specification will not describe them in detail here.

[0174] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0175] Similarly, it should be understood that in order to streamline the present invention and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of the present invention, various features of the present invention are sometimes grouped together into a single embodiment, figure, or description thereof. However, this disclosed method should not be interpreted as reflecting the intention that the claimed invention requires more features than those expressly recited in each claim. Rather, as reflected in the claims, inventive aspects lie in less than all of the features of the individual embodiments previously disclosed. Therefore, the claims that follow the detailed description are hereby expressly incorporated into the detailed description, with each claim itself serving as a separate embodiment of the present invention.

[0176] Those skilled in the art will appreciate that the modules in the devices in the embodiments may be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments may be combined into one module or unit or component, and in addition they may be divided into a plurality of submodules or subunits or subcomponents. Except that at least some of such features and / or processes or units are mutually exclusive, all features disclosed in this specification (including the accompanying claims, abstracts and drawings) and all processes or units of any method or device disclosed in this manner may be combined in any combination. Unless otherwise expressly stated, each feature disclosed in this specification (including the accompanying claims, abstracts and drawings) may be replaced by an alternative feature providing the same, equivalent or similar purpose.

[0177] In addition, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present invention and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0178] It should be noted that the above embodiments illustrate the present invention rather than limit it, and that those skilled in the art may devise alternative embodiments without departing from the scope of the appended claims. In the claims, any reference symbol between brackets shall not be construed as a limitation on the claims. The word "comprising" does not exclude the presence of elements or steps not listed in the claims. The word "one" or "an" preceding an element does not exclude the presence of a plurality of such elements. The present invention may be implemented by means of hardware comprising a number of different elements and by means of a suitably programmed computer. In a unit claim enumerating a number of devices, several of these devices may be embodied by the same hardware item. The use of the words first, second, and third, etc., does not indicate any order. These words may be interpreted as names.

Claims

1. A half-bridge power unit, characterized in that: The half-bridge power unit includes at least one half-bridge power sub-unit; Each of the half-bridge power subunits (201) comprises a group of upper bridge single tubes (2011) and lower bridge single tubes (2012), wherein the upper bridge single tubes (2011) and the lower bridge single tubes (2012) are connected in series; The upper bridge single tube (2011) and the lower bridge single tube (2012) are devices of the same structure with the source power terminal and the drain power terminal located on the same side surface.

2. The half-bridge power unit according to claim 1, characterized in that: The upper bridge single tube (2011) comprises a first source power terminal (S1) and a first drain power terminal (D1), wherein the first source power terminal (S1) and the first drain power terminal (D1) are located on the same side surface of the upper bridge single tube (2011); The lower bridge single tube (2012) comprises a second source power terminal (S2) and a second drain power terminal (D2), wherein the second source power terminal (S2) and the second drain power terminal (D2) are located on the same side surface of the lower bridge single tube (2012); The first source power terminal (S1) and the second drain power terminal (D2) are electrically connected and extended to form an AC output terminal (AC_out), the first drain power terminal (D1) is extended to form a DC positive terminal (DC+), and the second source power terminal (S2) is extended to form a DC negative terminal (DC-).

3. The half-bridge power unit according to claim 2, characterized in that: The lead-out direction of the DC positive terminal (DC+) is in the extension direction of the second drain power terminal (D2).

4. The half-bridge power unit according to claim 3, characterized in that: The lead-out direction of the DC negative terminal (DC-) is in the extension direction of the second drain power terminal (D2).

5. The half-bridge power unit according to claim 4, characterized in that: The lead-out direction of the AC output terminal (AC_out) is in the extending direction of the second drain power terminal (D2).

6. The half-bridge power unit according to claim 5, characterized in that: The DC positive terminal (DC+) and the DC negative terminal (DC-) are located on a first side of the half-bridge power subunit.

7. The half-bridge power unit according to claim 6, characterized in that: The AC output terminal (AC_out) is located at a second side of the half-bridge power subunit, wherein the first side is opposite to the second side.

8. The half-bridge power unit according to claim 2, characterized in that: The source power terminals and drain power terminals of the upper bridge single tube (2011) and the lower bridge single tube (2012) are arranged in opposite directions.

9. The half-bridge power unit according to claim 8, characterized in that: The half-bridge power unit also includes a first busbar (202); One end of the first busbar (202) is electrically connected to the first drain power terminal (D1), and the other end of the first busbar (202) extends out to form the DC positive terminal (DC+).

10. The half-bridge power unit according to claim 9, characterized in that: The other end of the first busbar (202) extends to the opposite side of the first drain power terminal (D1), crosses over the upper bridge single tube (2011), and extends out to form the DC positive terminal (DC+).

11. The half-bridge power unit according to claim 9, characterized in that: The half-bridge power unit also includes a second busbar (203); One end of the second busbar (203) is electrically connected to the second source power terminal (S2), and the other end of the second busbar (203) extends to form the DC negative terminal (DC-).

12. The half-bridge power unit according to claim 11, characterized in that: The other end of the second busbar (203) extends to the same side of the second source power terminal (S2) and crosses over the upper bridge single tube (2011) to form the DC negative terminal (DC-).

13. The half-bridge power unit according to claim 11, characterized in that: The half-bridge power unit also includes a third busbar (204); One end of the third busbar (204) is electrically connected to the first source power terminal (S1) and the second drain power terminal (D2) at the same time, and the other end of the third busbar (204) extends out to form the AC output terminal (AC_out).

14. The half-bridge power unit according to claim 13, characterized in that: The other end of the third busbar (204) extends to the same side as the first source power terminal (S1), crosses over the lower bridge single tube (2012), and then extends out to form the AC output terminal (AC_out).

15. The half-bridge power unit according to claim 13, characterized in that: The first busbar, the second busbar and the third busbar are stacked and insulated from each other.

16. The half-bridge power unit according to claim 2, characterized in that: The source power terminals and the drain power terminals of the upper bridge single tube and the lower bridge single tube are arranged in the same direction.

17. The half-bridge power unit according to claim 16, characterized in that: The half-bridge power unit also includes a fourth busbar (205); One end of the fourth busbar (205) is electrically connected to the first drain power terminal (D1), and the other end of the fourth busbar (205) extends to form the DC positive terminal (DC+).

18. The half-bridge power unit according to claim 17, characterized in that: The other end of the fourth busbar (205) extends to the opposite side of the first drain power terminal (D1), crosses over the upper bridge single tube (2011), and then extends out to form the DC positive terminal (DC+).

19. The half-bridge power unit according to claim 17, characterized in that: The other end of the fourth busbar (205) extends in the extension direction of the first drain power terminal (D1) to extend out to form the DC positive terminal (DC+).

20. The half-bridge power unit according to claim 17, characterized in that: The half-bridge power unit also includes a fifth busbar (206); One end of the fifth busbar (206) is electrically connected to the second source power terminal (S2), and the other end of the fifth busbar (206) extends to form the DC negative terminal (DC-).

21. The half-bridge power unit according to claim 20, characterized in that: The other end of the fifth busbar (206) extends to the opposite side of the second source power terminal (S2), sequentially crossing the lower bridge single tube (2012) and the upper bridge single tube (2011) to form the DC negative terminal (DC-).

22. The half-bridge power unit according to claim 20, characterized in that: The other end of the fifth busbar (206) extends to the same side of the second source power terminal (S2), crosses over the upper bridge single tube (2011) and extends out to form the DC negative terminal (DC-).

23. The half-bridge power unit according to claim 20, characterized in that: The half-bridge power unit also includes a sixth busbar (207); One end of the sixth busbar (207) is electrically connected to the first source power terminal (S1) and the second drain power terminal (D2) at the same time, and the other end of the sixth busbar (207) extends to form the AC output terminal (AC_out).

24. The half-bridge power unit according to claim 23, characterized in that: The other end of the sixth busbar (207) extends to the same side of the first source power terminal (S1), crosses the lower bridge single tube (2012), is electrically connected to the second drain power terminal (D2), and then extends out to form the AC output terminal (AC_out).

25. The half-bridge power unit according to claim 23, characterized in that: One end of the sixth busbar (207) is electrically connected to the first source power terminal (S1), and the other end of the sixth busbar (207) extends to the opposite side of the first source power terminal (S1), crosses over the upper bridge single tube (2011) and is electrically connected to the second drain power terminal (D2), and then crosses over the lower bridge single tube (2012) and extends out to form the AC output terminal (AC_out).

26. The half-bridge power unit according to claim 23, characterized in that: The fourth busbar (205), the fifth busbar (206) and the sixth busbar (207) are stacked and insulated from each other.

27. The half-bridge power unit according to any one of claims 2 to 26, characterized in that: The number of the half-bridge power subunits is at least two, at least two of the half-bridge power subunits are connected in parallel, at least two of the upper bridge single tubes are arranged along a first straight line, and at least two of the lower bridge single tubes are arranged along a second straight line, and the first straight line is parallel to the second straight line.

28. The half-bridge power unit according to claim 27, characterized in that: The half-bridge power unit also includes a DC capacitor, which is arranged at one end of a group of the upper bridge single tube and the lower bridge single tube in the half-bridge power sub-unit in the arrangement direction, the positive electrode of the DC capacitor is electrically connected to the DC positive terminal, and the negative electrode of the DC capacitor is electrically connected to the DC negative terminal.

29. The half-bridge power unit according to claim 2, characterized in that: The upper bridge single tube (2011) further comprises a first driving gate terminal (G1), and the lower bridge single tube (2012) further comprises a second driving gate terminal (G2); The width of the source power terminal and the drain power terminal of any single tube of the upper bridge single tube (2011) and the lower bridge single tube (2012) is greater than the width of the corresponding driving gate terminal.

30. The half-bridge power unit according to claim 29, characterized in that: The upper bridge single tube (2011) further includes a first driving source terminal (DS1), and the lower bridge single tube (2012) further includes a second driving source terminal (DS2); The width of the source power terminal and the drain power terminal of any single tube of the upper bridge single tube (2011) and the lower bridge single tube (2012) is greater than the width of the corresponding driving source terminal.

31. The half-bridge power unit according to claim 30, characterized in that: The source power terminal and the drain power terminal of any single tube of the upper bridge single tube and the lower bridge single tube extend along a first direction, and the driving source terminal and the driving gate terminal extend along a second direction. The first direction and the second direction are located in two mutually orthogonal planes.

32. A three-phase full-bridge power unit, characterized in that: The three-phase full-bridge power unit comprises a half-bridge power unit according to any one of claims 1 to 31; The number of the half-bridge power units is three, and the three half-bridge power units correspond to three different phase lines of the three-phase alternating current respectively.

33. The three-phase full-bridge power unit according to claim 32, characterized in that: The three-phase full-bridge power unit also includes a driving board and a heat dissipation substrate; The driving board is arranged above the half-bridge power unit and is electrically connected to the driving terminal of each half-bridge power sub-unit; The heat dissipation substrate is arranged below the half-bridge power unit and is sintered and fixed to the bottom of the upper bridge single tube and the lower bridge single tube.

34. The three-phase full-bridge power unit according to claim 33, characterized in that: Bosses are arranged on the heat dissipation substrate in areas corresponding to the upper bridge single tube and the lower bridge single tube, and the bottoms of the upper bridge single tube and the lower bridge single tube are sintered and fixed to the bosses at corresponding positions.

35. A motor controller, characterized in that: The motor controller comprises a three-phase full-bridge power unit as described in any one of claims 32 to 34.

36. A vehicle, characterized in that: The vehicle includes the motor controller of claim 35.

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