Power Module

Abstract

To provide a power module in which a substrate is unlikely to be damaged by a thermal stress.SOLUTION: A bridge main unit comprises at least one first bridge subunit and at least one second bridge subunit, and is a bridge between a first surface and a second surface. Each of the first bridge subunit and the second bridge subunit comprises a bottom surface, a top surface opposite to the bottom surface, a first conducting area, a second conducting area, and a third conducting area. The bottom surface faces the first surface and the second surface. The first conducting area is on the bottom surface. The second conducting area and the third conducting area are positioned on the top surface.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to power conversion technology, and more particularly to a power module. [Background technology]

[0002] With the rise of environmental awareness, electric vehicles and other devices that use renewable energy as their power source are gradually appearing. Here, the motor of an electric vehicle is equipped with a power module to manage the power supply. The power module has two main boards fixed to the housing.

[0003] Moreover, one of the two main boards is mounted with a part of the upper arm circuit and a part of the lower arm circuit of the switch circuit, and the other main board is provided with another part of the upper arm circuit and another part of the lower arm circuit of the switch circuit. The two main boards are electrically connected via wires (for example, electrically connected by wire bonding) to form a switch circuit. Summary of the Invention [Problem to be solved by the invention]

[0004] However, since the thermal expansion coefficient of the main board is smaller than that of the shell, if only one main board is used to mount the switch circuit, the main board may be damaged by thermal stress.

[0005] In addition, with technological advances, the amount of current used by electric vehicle motors is gradually increasing. Therefore, power modules are increasingly required to withstand large currents. However, currently, the wiring on the second main board is thin and may not be able to withstand large currents.

[0006] If a large-area metal plate is used instead of wires, it can withstand a large current. However, the thermal expansion coefficient of the metal plate is higher than that of the main board, so the main board and the metal plate may be damaged due to thermal stress between them. [Means for solving the problem]

[0007] In view of the above problems, the present invention has the following configuration. One aspect of the present invention is a power module including a first power input terminal, a second power input terminal, a first main board, a second main board, a plurality of first switches, a plurality of second switches, and a main bridge unit, wherein the first power input terminal has a plurality of first connection ports, the second power input terminal has a plurality of second connection ports, the first main board has a first surface, the second main board has a second surface, and the plurality of first switches each have a first control terminal, a first input terminal, and a first output terminal; a plurality of second switches each having a second control terminal, a second input terminal, and a second output terminal; the main bridge unit has at least one first sub-bridge unit and at least one second sub-bridge unit, and bridges the first surface and the second surface; each of the first sub-bridge unit and the second sub-bridge unit has a bottom surface, a top surface opposite to the bottom surface, a first conductive area, a second conductive area, and a third conductive area, the bottom surface facing the first surface and the second surface; a conductive area located on the bottom surface, and the second conductive area and the third conductive area located on the top surface; the first conductive area of ​​at least one of the first sub-bridge units is connected between the first output terminals of the first switches and the second input terminals of the second switches; the first conductive area of ​​at least one of the second sub-bridge units is connected between the first input terminals of the first switches and the first power supply input terminal, or between the second output terminals of the second switches and the second power supply input terminal, transmitting current signals among the first power supply input terminal, the first switches, the second switches, and the second power supply input terminal; and the second conductive areas of at least one of the first sub-bridge units and at least one of the second sub-bridge units are connected to the first control terminals of the first switches and the second control terminals of the second switches, transmitting control signals between the first switches and the second switches;The third conductive areas of at least one of the first sub-bridge units and at least one of the second sub-bridge units are connected to the first output terminals of the first switches and the second output terminals of the second switches, and transmit output signals of the first switches and the second switches.

[0008] In the above aspect, the multiple first connection ports and the multiple second connection ports may be arranged in a staggered pattern in pairs on the first surface of the first main board or the second surface of the second main board along a short side direction parallel to the first main board and the second main board.

[0009] In addition, in the above aspect, at least one of the first sub-bridge units and at least one of the second sub-bridge units may be arranged along a short side direction parallel to the first main board and the second main board.

[0010] In addition, in the above aspect, the first main substrate may further have a first main mounting area located on the first surface, and the second main substrate may further have a second main mounting area located on the second surface, and the first input terminals of the first switches may be connected to the first main mounting area, and the second input terminals of the second switches may be connected to the second main mounting area.

[0011] In addition, in the above aspect, the first main board may further have a first main power area located on the first surface, the first main power area having at least one first sub-power area and connecting a plurality of the first output terminals of a plurality of the first switches, and at least one of the first sub-bridge units may be connected to the second main mounting area on both sides of the first conductive area.

[0012] In the above aspect, at least one of the first sub-power supply areas may be adjacent to the first main mounting area.

[0013] In addition, in the above aspect, the power supply may further include two power output terminals, the first conductive area of ​​at least one of the second sub-bridge units being connected between the first input terminals of the first switches and the first power input terminal, and the two power output terminals being connected to at least one of the first sub-power areas of the first main power area.

[0014] In addition, in the above aspect, the second main board may further have a second main power area located on the second surface, the second main power area having at least one second sub-power area, and connecting the second output terminals of the second switches to the second power input terminal.

[0015] In the above aspect, at least one of the second sub-power supply areas may be adjacent to the second main mounting area.

[0016] In addition, in the above aspect, the first conductive area of ​​at least one of the second sub-bridge units may connect between the first input terminals of the first switches and the first power supply input terminal, the second main power supply area may have at least one third sub-power supply area and be connected to the first connection ports of the first power supply input terminal, and both sides of the first conductive area of ​​at least one of the second sub-bridge units may be connected to the first main mounting area and at least one of the third sub-power supply areas, respectively.

[0017] In addition, in the above aspect, at least one of the third sub-power areas may surround the second main mounting area and at least one of the second sub-power areas to form an open ring shape with a gap, and the main bridge unit may be adjacent to the gap.

[0018] In addition, in the above aspect, at least one of the second sub-power supply areas has a plurality of first connection areas and is connected to a plurality of the second connection ports of the second power supply input terminal, and at least one of the third sub-power supply areas has a plurality of second connection areas and is connected to a plurality of the connection ports of the first power supply input terminal, and the plurality of the first connection areas and the plurality of the second connection areas may be arranged in a staggered pattern in pairs on the second surface of the second main substrate along a short side direction parallel to the first main substrate and the second main substrate.

[0019] In addition, in the above aspect, the first conductive area of ​​at least one of the second sub-bridge units may connect between the second output terminals of the second switches and the second power input terminal, at least one of the second sub-power areas of the second main power area is connected to the second output terminals of the second switches, the first main power area has at least one fourth sub-power area and is connected to the second connection ports of the second power input terminal, and both sides of the first conductive area of ​​at least one of the second sub-bridge units may be connected to at least one of the second sub-power areas and at least one of the fourth sub-power areas, respectively.

[0020] In the above aspect, at least one of the fourth sub-power areas may be adjacent to at least one of the first sub-power areas.

[0021] In addition, in the above aspect, the first main mounting area may have a plurality of third connection areas and be connected to the plurality of first connection ports of the first power input terminal, at least one of the fourth sub-power supply areas may have a plurality of fourth connection areas and be connected to the plurality of second connection ports of the second power supply input terminal, and the plurality of third connection areas and the plurality of fourth connection areas may be arranged in a staggered pattern in pairs on the first surface of the first main substrate along a short side direction parallel to the first main substrate and the second main substrate.

[0022] In addition, in the above aspect, the power supply may further include two power output terminals, and the first conductive area of ​​at least one of the second sub-bridge units may connect between the second output terminals of the second switches and the second power input terminal, and the two power output terminals may be connected to the second main mounting area.

[0023] In addition, in the above aspect, the second main power supply area may have at least one fifth sub-power supply area, two of the power supply output terminals may be connected to at least one of the fifth sub-power supply areas, and at least one of the fifth sub-power supply areas may be connected to the second main mounting area.

[0024] In the above aspect, at least one of the fifth sub-power areas may be adjacent to at least one of the second sub-power areas.

[0025] In addition, in the above aspect, the first main substrate may further have a first main control area located on the first surface, the second main substrate may further have a second main control area located on the second surface, the first control terminals of the first switches may be connected to the first main control area, the second control terminals of the second switches may be connected to the second main control area, and the first main control area and the second main control area may connect the second conductive areas of at least one of the first sub-bridge units and at least one of the second sub-bridge units.

[0026] In addition, in the above aspect, the first main substrate may further have a first main detection area located on the first surface, the second main substrate may further have a second main detection area located on the second surface, the first output terminals of the first switches may be connected to the first main detection area, the second output terminals of the second switches may be connected to the second main detection area, and the first main detection area and the second main detection area may be connected to the third conductive areas of at least one of the first sub-bridge units and at least one of the second sub-bridge units. Effect of the Invention

[0027] As described above, according to the embodiment of the present invention, the power module can withstand a larger current through the main bridge unit and is less susceptible to damage caused by thermal stress. In addition, the embodiment of the present invention can transmit a larger current signal through the main bridge unit, and can also transmit other types of signals (e.g., source signals and gate signals of the first switch and the second switch) between the first main board and the second main board at the same time. [Brief description of the drawings]

[0028] [Figure 1] FIG. 1 is a perspective view of a power module according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram showing a switch circuit of a power module according to an embodiment of the present invention. [Diagram 3] FIG. 1 is a top view of a power module according to a first embodiment of the present invention. [Figure 4] FIG. 4 is a top view of a power module according to a second embodiment of the present invention. [Diagram 5] FIG. 11 is a top view of a power module according to a third embodiment of the present invention. [Figure 6] FIG. 11 is a top view of a power module according to a fourth embodiment of the present invention. [Figure 7] FIG. 2 is a schematic bottom view of a main bridge unit according to the first embodiment of the present invention. [Figure 8] FIG. 11 is a bottom view of the first sub-bridge unit in the second embodiment of the present invention. [Figure 9] FIG. 13 is a bottom view of the first sub-bridge unit in the third embodiment of the present invention. [Figure 10] FIG. 13 is a bottom view of the first sub-bridge unit in the fourth embodiment of the present invention. [Figure 11] FIG. 11 is a bottom view of the second sub-bridge unit in the second embodiment of the present invention. [Figure 12] FIG. 13 is a bottom view of the second sub-bridge unit in the third embodiment of the present invention. [Figure 13] FIG. 13 is a bottom view of the second sub-bridge unit in the fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] For convenience of explanation, only one component is shown in some embodiments, but the present invention is not limited to this, and the number of components may be multiple. Also, for convenience of explanation, although multiple components are shown in some embodiments, the present invention is not limited to this, and the number of components may be one.

[0030] The following description will be given with reference to Fig. 1. Fig. 1 is a perspective view of a power module according to an embodiment of the present invention. The power module 1 includes a first power input terminal 10, a second power input terminal 20, a first main board 30, a second main board 40, a plurality of first switches 50, a plurality of second switches 60, and a main bridge unit 70.

[0031] The first power input terminal 10 has a plurality of first connection ports 11. The second power input terminal 20 has a plurality of second connection ports 21. The first main board 30 has a first switch 50 mounted thereon. The second main board 40 has a second switch 60 mounted thereon.

[0032] The first power supply input terminal 10 and the second power supply input terminal 20 supply a DC power supply to a circuit formed by the first switch 50 and the second switch 60. For example, the first power supply input terminal 10 supplies a positive potential of the DC power supply, and the second power supply input terminal 20 supplies a negative potential of the DC power supply.

[0033] The first main board 30 has a first surface SF1. The second main board 40 has a second surface SF2. The main bridge unit 70 bridges the first surface SF1 and the second surface SF2, transmits current signals between the first power input terminal 10, the first switch 50, the second switch 60, and the second power input terminal 20, transmits control signals to the first switch 50 and the second switch 60, and transmits output signals to the first switch 50 and the second switch 60.

[0034] In this embodiment, the first switch 50 and the second switch 60 can be realized by an electronic switch, and may be, for example, an insulated gate bipolar transistor (IGBT) or a circuit in which an insulated gate bipolar transistor and a diode are connected in parallel.

[0035] In this embodiment, the first main board 30 and the second main board 40 are separated from each other. For example, the first main board 30 and the second main board 40 are arranged in a longitudinal direction parallel to each other, and a gap exists between the end of the first main board 30 on the second main board 40 side and the second main board 40.

[0036] Next, a description will be given with reference to Fig. 2. This is a diagram showing a switch circuit 80 of a power module 1 according to an embodiment of the present invention. A first switch 50 has a first control terminal G1, a first input terminal D1, and a first output terminal S1.

[0037] For example, if the first switch 50 is configured with an N-type insulated gate bipolar transistor, in this case, the first control terminal G1 is the gate of the N-type insulated gate bipolar transistor, the first input terminal D1 is the drain terminal of the N-type insulated gate bipolar transistor, and the first output terminal S1 is the source terminal of the N-type insulated gate bipolar transistor.

[0038] The second switch 60 has a second control terminal G2, a second input terminal D2, and a second output terminal S2. For example, if the second switch 60 is configured with an N-type insulated gate bipolar transistor, the second control terminal G2 is the gate of the N-type insulated gate bipolar transistor, the second input terminal D2 is the drain of the N-type insulated gate bipolar transistor, and the second output terminal S2 is the source of the N-type insulated gate bipolar transistor.

[0039] 2, the switch circuit 80 of the power module 1 has an upper arm circuit 81 and a lower arm circuit 82. The upper arm circuit 81 is configured with first switches 50 connected in parallel. For example, first input terminals D1 of the first switches 50 are connected to each other, and first output terminals S1 of the first switches 50 are connected to each other.

[0040] The lower arm circuit 82 is configured by second switches 60 connected in parallel. For example, the second input terminals D2 of the second switches 60 are connected to each other, and the second output terminals S2 of the second switches 60 are connected to each other. In addition, the upper arm circuit 81 and the lower arm circuit 82 are connected in series.

[0041] For example, the second input terminals D2 of the lower arm circuits 82, which are connected to each other, are connected to the first output terminal S1 of the upper arm circuit 81, which is connected to each other. The first power supply input terminal 10 is connected to the upper arm circuit 81, and the second power supply input terminal 20 is connected to the lower arm circuit 82, and supplies DC power to the switch circuit 80. For example, the first power supply input terminal 10 is connected to the first input terminal D1 of the upper arm circuit 81, which is connected to each other, and the second power supply input terminal 20 is connected to the second output terminal S2 of the lower arm circuit 82, which is connected to each other.

[0042] 1 and 2, in this embodiment, the power module 1 further includes two power supply output terminals 91 and 92. The power supply output terminals 91 and 92 are connected to a connection point at which the upper arm circuit 81 and the lower arm circuit 82 are connected in series. For example, the power supply output terminals 91 and 92 are connected to a first output terminal S1 of the upper arm circuit 81 that are connected to each other, and a second input terminal D2 of the lower arm circuit 82 that are connected to each other.

[0043] In this manner, the power supply output terminals 91, 92 can output the power of the AC power supply to supply power to an electronic device (e.g., a motor). In this embodiment, as shown in Figures 1 and 2, the power module 1 also includes two drive terminals 93, 94 (hereinafter also referred to as a first drive terminal 93 and a second drive terminal 94, respectively), which are used to connect a drive device.

[0044] The first drive terminal 93 outputs a first control signal for driving the first switch 50 of the upper arm circuit 81. The second drive terminal 94 outputs a second control signal for driving the second switch 60 of the lower arm circuit 82. For example, as shown in FIG. 2, the first control terminals G1 of the first switches 50 are connected to each other, and the first control signal is obtained from the first drive terminal 93. The second control terminals G2 of the second switches 60 are connected to each other, and the second control signal is obtained from the second drive terminal 94.

[0045] 1 and 2, the power module 1 also includes two detection terminals 95 and 96 (hereinafter also referred to as a first detection terminal 95 and a second detection terminal 96, respectively). In addition, a measuring device (such as an ammeter) can be connected to the first detection terminal 95 and the second detection terminal 96 in order to know the current values ​​consumed by the upper arm circuit 81 and the lower arm circuit 82.

[0046] 2, for example, the first output terminals S1 of the upper arm circuit 81, which are connected to each other, generate a first output signal and transmit it to a first detection terminal 95. Here, the first output signal refers to a current signal output by the first output terminal S1. Also, the second output terminals S2 of the lower arm circuit 82, which are connected to each other, generate a second output signal and transmit it to a second detection terminal 96. Here, the second output signal refers to a current signal output by the second output terminal S2.

[0047] 1 and 2, the power module 1 also includes a power supply current terminal 97. The measuring device is connected so as to know the value of the current supplied by the switch circuit 80 (i.e., the current value of the current signal from the first power supply input terminal 10). For example, as shown in FIG. 2, the first power supply input terminal 10 outputs a current signal to the power supply current terminal 97.

[0048] Description will be made with reference to Fig. 3 to Fig. 6. Fig. 3 is a top view of a power module 1 according to a first embodiment of the present invention, Fig. 4 is a top view of a power module 1 according to a second embodiment of the present invention, Fig. 5 is a top view of a power module 1 according to a third embodiment of the present invention, and Fig. 6 is a top view of a power module 1 according to a fourth embodiment of the present invention.

[0049] The main bridge unit 70 spans (bridges) the first surface SF1 and the second surface SF2. The main bridge unit 70 has at least one first sub-bridge unit 71 and at least one second sub-bridge unit 7.

[0050] In this embodiment, as shown in Figures 4 to 6, the first subbridge unit 71 and the second subbridge unit 72 are independent of each other, that is, the first subbridge unit 71 and the second subbridge unit 72 are separated from each other and have a distance between them. In another embodiment, as shown in FIG. 3, a first sub-bridge unit 71 and a second sub-bridge unit 72 are connected.

[0051] 3, the main bridge unit 70 distinguishes two second sub-bridge units 72 by two axes L1, L2 parallel to the longitudinal directions of the first main board 30 and the second main board 40. The first sub-bridge unit 71 is located between the two second sub-bridge units 72 to connect them.

[0052] Compared with the first subbridge unit 71 and the second subbridge unit 72 that are connected to each other, the first subbridge unit 71 and the second subbridge unit 72 that are independent (not integrally formed) can reduce the influence of thermal stress. Description will be made with reference to Figs. 3 to 13. Here, Fig. 7 is a schematic bottom view of the main bridge unit in the first embodiment of the present invention. Also, Fig. 8 is a bottom view of the first subbridge unit in the second embodiment of the present invention. Fig. 9 is a bottom view of the first subbridge unit in the third embodiment of the present invention. Fig. 10 is a bottom view of the first subbridge unit in the fourth embodiment of the present invention. Fig. 11 is a bottom view of the second subbridge unit in the second embodiment of the present invention. Fig. 12 is a bottom view of the second subbridge unit in the third embodiment of the present invention. Fig. 13 is a bottom view of the second subbridge unit in the fourth embodiment of the present invention.

[0053] Each of the first sub-bridge unit 71 and the second sub-bridge unit 72 has a bottom surface SF3, a top surface SF4 opposite the bottom surface SF3, a first conductive area CA1, a second conductive area CA2, and a third conductive area CA3.

[0054] The bottom surface SF3 faces the first surface SF1 and the second surface SF2, i.e., the bottom surface SF3 is an inner surface and the top surface SF4 is an outer surface.

[0055] The first conductive area CA1 is located on the bottom surface SF3, the second conductive area CA2 and the third conductive area CA3 are located on the top surface SF4.

[0056] The first conductive area CA1 of the first sub-bridge unit 71 is connected between the first output terminal S1 of the first switch 50 and the second input terminal D2 of the second switch 60, and outputs a current signal from the first output terminal S1 of the first switch 50 to the second input terminal D2 of the second switch 60.

[0057] Specifically, the first output terminal S1 of the first switch 50 and the second input terminal D2 of the second switch 60 are connected to a main installation area and / or a main power supply area of ​​the first surface SF1 and the second surface SF2, which will be described in more detail below.

[0058] In addition, the first conductive area CA1 of the first sub-bridge unit 71 is connected to the main installation area and / or the main power supply area of ​​the first surface SF1 and the second surface SF2, which will be described in detail later. In addition, the current signal from the first output terminal S1 of the first switch 50 is transmitted to the second input terminal D2 of the second switch 60.

[0059] The first conductive area CA1 of the second sub-bridge unit 72 is connected between the first input terminal D1 of the first switch 50 and the first power supply input terminal 10, and transmits a current signal from the first power supply input terminal 10 to the first input terminal D1 of the first switch 50.

[0060] Alternatively, the first conductive area CA1 of the second sub-bridge unit 72 is connected between the second output terminal S2 of the second switch 60 and the second power supply input terminal 20, and transmits a current signal from the second output terminal S2 of the second switch 60 to the second power supply input terminal 20.

[0061] Specifically, as shown in Figures 3 and 4, the first input terminal D1 of the first switch 50 and the first connection port 11 of the first power input terminal 10 are connected to the main installation area or main power area of ​​the first surface SF1 and the second surface SF2, which will be described in more detail below.

[0062] In addition, the first conductive area CA1 of the second sub-bridge unit 72 is connected to the main installation area and / or the main power supply area of ​​the first surface SF1 and the second surface SF2, which will be described in detail later. In addition, the current signal from the first power supply input terminal 10 is transmitted to the first input terminal D1 of the first switch 50.

[0063] As shown in Figures 5 and 6, the second output terminal S2 of the second switch 60 and the second connection port 21 of the second power input terminal 20 are connected to the main installation area and / or the main power area of ​​the first surface SF1 and the second surface SF2, as will be described in detail later.

[0064] And the first conductive area CA1 of the second sub-bridge unit 72 is connected to the main installation area and / or the main power supply area of ​​the first surface SF1 and the second surface SF2, which will be described in detail later. The current signal from the second output terminal S2 of the second switch 60 is transmitted to the second power supply input terminal 20.

[0065] In this manner, the first sub-bridge unit 71 and the second sub-bridge unit 72 can form a current path AA shown in Fig. 2 with the first power supply input terminal 10, the first switch 50, the second switch 60, and the second power supply input terminal 20, and transmit a current signal between the first power supply input terminal 10, the first switch 50, the second switch 60, and the second power supply input terminal 20. Here, the current value of the current signal may exceed 450 amperes.

[0066] The second conductive areas CA2 of the first sub-bridge unit 71 and the second sub-bridge unit 72 are connected to the first control terminal G1 of the first switch 50 and the second control terminal G2 of the second switch 60, and the control signals of the first switch 50 and the second switch 60 are transmitted thereto.

[0067] Specifically, as shown in Figures 3 to 6, the first driving terminal 93 and the second driving terminal 94 are connected to the second conductive area CA2 of the first sub-bridge unit 71 and / or the second sub-bridge unit 72 (details will be described later).

[0068] The first control terminal G1 of the first switch 50 and the second control terminal G2 of the second switch 60 are connected to main control areas of the first surface SF1 and the second surface SF2 (described in more detail below).

[0069] The second conductive areas CA2 of the first sub-bridge unit 71 and the second sub-bridge unit 72 are connected to the main control areas of the first surface SF1 and the second surface SF2 (described in more detail below).

[0070] In this manner, the second conductive area CA2 of the first sub-bridge unit 71 and the second sub-bridge unit 72 transmit the first control signal and the second control signal from the first driving terminal 93 and the second driving terminal 94 to the first control terminal G1 of the first switch 50 and the second control terminal G2 of the second switch 60.

[0071] The third conductive area CA3 of the first sub-bridge unit 71 and the second sub-bridge unit 72 is connected to the first output terminal S1 of the first switch 50 and the second output terminal S2 of the second switch 60, and the output signals of the first switch 50 and the second switch 60 are transmitted.

[0072] Specifically, as shown in Figures 3 to 6, the first detection terminal 95 and the second detection terminal 96 are connected to the third conductive area CA3 of the first sub-bridge unit 71 and / or the second sub-bridge unit 72 (details will be described later).

[0073] A first output terminal S1 of the first switch 50 and a second output terminal S2 of the second switch 60 are connected to the detection main areas of the first surface SF1 and the second surface SF2 (described in detail below).

[0074] The third conductive areas CA3 of the first sub-bridge unit 71 and the second sub-bridge unit 72 are connected to the detection main areas of the first surface SF1 and the second surface SF2 (described in detail below).

[0075] In this manner, the third conductive area CA3 of the first sub-bridge unit 71 and the second sub-bridge unit 72 transmit the first output signal and the second output signal from the first output terminal S1 and the second output terminal S2 to the first detection terminal 95 and the second detection terminal 96.

[0076] The first main substrate 30 and the second main substrate 40 may be formed of a substrate having a smaller thermal expansion coefficient (for example, a ceramic substrate).

[0077] The first sub-bridge unit 71 and the second sub-bridge unit 72 may be composed of a substrate made of a material with a smaller thermal expansion coefficient, where the first sub-bridge unit 71 and the second sub-bridge unit 72 have a small area, and therefore the substrate made of a material with a smaller thermal expansion coefficient is less susceptible to damage due to thermal stress compared to a large-area metal plate.

[0078] The main installation area, the main power supply area, the main control area and the main detection area of ​​the first surface SF1 and the second surface SF2 are formed of a conductive material.

[0079] The first conductive area CA1, the second conductive area CA2, and the third conductive area CA3 are made of a conductive material. Specifically, the conductive material may be a metal layer formed by patterning a metal layer laminated on a substrate by dry etching, wet etching, or the like.

[0080] The material of the metal layer may be a conductive metal such as copper or aluminum, etc. The main installation area, the main power supply area, the main control area and the main detection area on the first surface SF1 are separated from each other and have a distance therebetween.

[0081] The main installation area, the main power supply area, the main control area and the main detection area on the second surface SF2 are separated and have a distance from each other. The second conductive area CA2 and the third conductive area CA3 in the same first sub-bridge unit 71 and the same second sub-bridge unit 72 are separated and have a distance from each other.

[0082] As shown in FIGS. 3 to 6, the first sub-bridge unit 71 and the second sub-bridge unit 72 are arranged along the short side direction parallel to the first main board 30 and the second main board 40.

[0083] In this embodiment, the second conductive areas CA2 transmitting the same control signal in the first sub-bridge unit 71 and the second sub-bridge unit 72 can be connected to each other (eg, connected to each other via a connecting member).

[0084] For example, the second conductive areas CA2 transmitting the first control signal (second control signal) of the first sub-bridge unit 71 and the second sub-bridge unit 72 are connected to each other.

[0085] In this embodiment, the third conductive areas CA3 transmitting the same output signal in the first sub-bridge unit 71 and the second sub-bridge unit 72 are connected to each other (for example, may be connected to each other via a connecting member).

[0086] For example, the third conductive areas CA3 transmitting the first output signal (second output signal) in the first sub-bridge unit 71 and the second sub-bridge unit 72 are connected to each other.

[0087] 3 to 6, the first main substrate 30 further has a first main mounting area MA1 located on the first surface SF1, and the second main substrate 40 has a second main mounting area MA2 located on the second surface SF2.

[0088] A first input terminal D1 of the first switch 50 is connected to the first main mounting area MA1, and a second input terminal D2 of the second switch 60 is connected to the second main mounting area MA2.

[0089] The first switches 50 are two-dimensionally arranged in the first main mounting area MA1, and the second switches 60 are two-dimensionally arranged in the second main mounting area MA2. In this embodiment, the first main mounting area MA1 includes two first sub-mounting areas (unnumbered).

[0090] A portion of the first switch 50 is disposed in one of the two first sub-mounting areas along a longitudinal direction parallel to the first main substrate 30 and the second main substrate 40. The other portion of the first switch 50 is disposed in the other of the two first mounting areas along a longitudinal direction parallel to the first main substrate 30 and the second main substrate 40.

[0091] The second main mounting area MA2 has two second sub-mounting areas. A part of the second switch 60 is disposed in one of the two second mounting areas along a longitudinal direction parallel to the first main board 30 and the second main board 40. The other part of the second switch 60 is disposed in the other of the two second mounting areas along a longitudinal direction parallel to the first main board 30 and the second main board 40.

[0092] 3 to 10, in this embodiment, the first main substrate 30 further includes a first main power area CD0 located on the first surface SF1. The first main power area CD0 includes at least a first sub-power area CD1 connected to the first output terminal S1 of the first switch 50.

[0093] Both sides of the first conductive area CA1 of the first sub-bridge unit 71 are respectively connected to the first sub-power area CD1 and the second main mounting area MA2. In this embodiment, the first sub-power area CD1 is adjacent to the first main mounting area MA1.

[0094] For example, as shown in Figures 3 and 4, in the first and second embodiments, the first sub-power area CD1 has a main wiring area (no symbol) and a main connection area (no symbol), and the main connection area is connected to the main wiring area.

[0095] The main wiring area of ​​the first sub-power area CD1 is connected to the first output terminal S1 of the first switch 50 via a connection member. The main wiring area of ​​the first sub-power area CD1 is located between the two first sub-mounting areas of the first main mounting area MA1.

[0096] As shown in FIG. 5, in the third embodiment, the first sub-power area CD1 surrounds the two first sub-mounting areas of the first main mounting area MA1 in an open ring shape, and connects the first output terminal S1 of the first switch 50 via a connecting member.

[0097] The open ring-shaped gap (cutout) is located away from the main bridge unit 70. As shown in Fig. 6, in the fourth embodiment, the first sub-power area CD1 has two branch areas on both sides of the first main mounting area MA1, which connect the first output terminal S1 of the first switch 50 via a connecting member.

[0098] In this embodiment, when the first conduction area CA1 of the second sub-bridge unit 72 is connected between the first input terminal D1 of the first switch 50 and the first power input terminal 10 (details will be described later), the two power output terminals 91, 92 are connected to the first sub-power area CD1 of the first main power area CD0.

[0099] In the first and second embodiments (i.e., the first conduction area CA1 of the second sub-bridge unit 72 is connected between the first input terminal D1 of the first switch 50 and the first power input terminal 10), the two power output terminals 91, 92 are connected to the main connection area of ​​the first sub-power area CD1 of the first main power area CD0.

[0100] As shown in FIGS. 3 to 6, the second main substrate 40 further has a second main power supply area CE0 located on the second surface SF2.

[0101] The second main power supply area CE0 has at least a second sub-power supply area CE1 connected to the second output terminal S2 of the second switch 60 and the second power supply input terminal 20. In this embodiment, the second sub-power supply area CE1 is adjacent to the second main mounting area MA2.

[0102] 3 and 4, in the first and second embodiments, the second sub-power area CE1 has a main connection area and a main wiring area, and the main connection area is connected to the main wiring area. The main wiring area of ​​the second sub-power area CE1 is connected to the second output terminal S2 of the second switch 60 via a connection member.

[0103] The second connection port 21 of the second power input terminal 20 is connected to the main connection area of ​​the second sub-power area CE1. The main wiring area of ​​the second sub-power area CE1 is located between the two second sub-mounting areas of the second main mounting area MA2.

[0104] As shown in FIG. 5, in the third embodiment, when the second sub-power area CE1 surrounds the second main mounting area MA2 in an open ring shape, and the second output terminal S2 of the second switch 60 is connected via a connecting member, the second sub-power area CE1 is connected to the second connection port 21 of the second power input terminal 20 via the first conduction area CA1 of the second sub-bridge unit 72 and the fourth sub-power area CD2 of the first main power area.

[0105] Here, an open ring-shaped gap abuts the main bridge unit 70 .

[0106] As shown in FIG. 6, in the fourth embodiment, the second sub-power area CE1 has two branch areas located on both sides of the second main mounting area MA2, and the second output terminal S2 of the second switch 60 is connected via a connecting member, and the second sub-power area CE1 is connected to the second connection port of the second power input terminal 20 via the first conduction area CA1 of the second sub-bridge unit 72 and the fourth sub-power area CD2 (details will be described later) of the first main power area CD0.

[0107] As shown in Figures 3, 4, 7 and 11, in the first and second embodiments, the second main power supply area CE0 has at least a third sub-power supply area CE2 connected to the first connection port 11 of the first power supply input terminal 10.

[0108] Both sides of the first conductive area CA1 of the second sub-bridge unit 72 are respectively connected to the first main mounting area MA1 and the third sub-power area CE2.

[0109] The first main mounting area MA1 is connected to a first input terminal D1 of a first switch 50, and the third sub-power area CE2 is connected to a first connection port 11 of a first power input terminal 10.

[0110] Therefore, in the first and second embodiments, the first conduction area CA1 of the second sub-bridge unit 72 is connected between the first input terminal D1 of the first switch 50 and the first power input terminal 10 via the first main mounting area MA1 and the third sub-power area CE2.

[0111] 3 and 4, in the first and second embodiments, the third sub-power area CE2 surrounds the second main mounting area MA2 and the second sub-power area CE1 to form an open ring with a gap, and the main bridge unit 70 is adjacent to the gap of the open ring.

[0112] As shown in Figures 5, 6, 12 and 13, in the third and fourth embodiments, the second sub-power area CE1 of the second main power area CE0 is connected to the second output terminal S2 of the second switch 60.

[0113] Specifically, the second sub-power area CE1 of the second main power area CE0 is connected to the second output terminal S2 of the second switch 60 via a connection member. The first main power area CD0 has at least a fourth sub-power area CD2 connected to the second connection port 21 of the second power input terminal 20.

[0114] Both sides of the first conductive area CA1 of the second sub-bridge unit 72 are respectively connected to the second sub-power area CE1 and the fourth sub-power area CD2.

[0115] The second sub-power area CE 1 is connected to the second output terminal S 2 of the second switch 60 , and the fourth sub-power area CD 2 is connected to the second connection port 21 of the second power input terminal 20 .

[0116] Therefore, in the third and fourth embodiments, the first conduction area CA1 of the second sub-bridge unit 72 is connected between the second output terminal S2 and the second power input terminal 20 of the second switch 60 via the second sub-power area CE1 and the fourth sub-power area CD2.

[0117] In this embodiment, the fourth sub-power area CD2 is adjacent to the first sub-power area CD1. For example, as shown in FIG. 5, in the third embodiment, the fourth sub-power area CD2 is located on one side of the first sub-power area CD1.

[0118] 6, in the fourth embodiment, the fourth sub-power area CD2 surrounds the first sub-power area CD1 and the first main mounting area MA1 in a ring shape. Among them, the open ring-shaped gap is adjacent to the main bridge unit 70.

[0119] As shown in Figures 5 and 6, in the third and fourth embodiments (i.e., the first conductive area CA1 of the second sub-bridge unit 72 is connected between the second output terminal S2 of the second switch 60 and the second power supply input terminal 20), the two power supply output terminals 91, 92 are connected to the second main mounting area MA2.

[0120] The difference from the fourth embodiment is that in the third embodiment (as shown in FIG. 5), the second main power area CE0 has at least a fifth sub-power area CE3, which is adjacent to the second sub-power area CE1 of the second main power area CE0.

[0121] For example, the fifth sub-power area CE3 is located on one side of the second sub-power area CE1 and is away from the main bridge unit 70. The two power output terminals 91, 92 are connected to the fifth sub-power area CE3, and the fifth sub-power area CE3 is connected to the second main mounting area MA2 (specifically, via a connecting member).

[0122] The connection between the fifth sub-power area CE3 and the second main mounting area MA2 may have a first connecting element and a second connecting element. Here, the description is given on the assumption that the connecting member is implemented by a wire.

[0123] To handle larger currents, a certain number of conductors are required for the connections, but it may not be possible to arrange all the conductors on the same plane, as this is limited by the length of the side of the second main mounting area MA2 adjacent to the fifth sub-power area CE3.

[0124] Thus, by arranging a part of the conductor (a first connection element) connecting between the fifth sub-power area CE3 and the second main mounting area MA2 on a first plane, another part of the conductor (a second connection element) is arranged on a second plane overlapping the first plane to connect between the fifth sub-power area CE3 and the second main mounting area MA2, such that the connection member is compatible with a specific number of conductors.

[0125] As shown in Figures 4 and 6, in this embodiment, the first connection port 11 of the first power input terminal 10 and the second connection port 21 of the second power input terminal 20 are arranged in a staggered pattern in pairs on the first surface SF1 of the first main board 30 or the second surface SF2 of the second main board 40 along the short side direction parallel to the first main board 30 and the second main board 40.

[0126] The first connection ports 11 and the second connection ports 21 are separated from each other by a distance. For example, as shown in Fig. 4, the first connection ports 11 and the second connection ports 21 are arranged in pairs in a staggered manner, with the second connection port 21 sandwiched between every two first connection ports 11.

[0127] That is, the first connection ports 11 and the second connection ports 21 are arranged alternately one by one.

[0128] However, the present invention is not limited to this, and for example, as shown in Fig. 6, two first connection ports 11 adjacent to the long side of the first main substrate 30 may be sandwiched between two different second connection ports 21. Then, the remaining first connection ports 11 (i.e., the first connection ports 11 away from the long side of the first main substrate 30) are sandwiched between the same two second connection ports 21. In this way, the parasitic inductance of the power module 1 can be reduced.

[0129] As shown in FIG. 4, in this embodiment, the second sub-power area of ​​the second main power area CE0 has a plurality of first connection areas 110 for connecting to the second connection port 21 of the second power input terminal 20.

[0130] Specifically, each of the first connection areas 110 is connected to a second connection port 21. The third sub-power area CE2 of the second main power area CE0 has a plurality of second connection areas 120 for connection to the first connection port 11 of the first power input terminal 10.

[0131] Specifically, each second connection area 120 is connected to the first connection port 11. Here, the main connection area of ​​the second main power supply area CE0 described above may be formed by the first connection area 110.

[0132] The first connection area 110 and the second connection area 120 are arranged in pairs in a staggered manner on the second surface SF2 of the second main substrate 40 along the short side direction parallel to the first main substrate 30 and the second main substrate 40. The first connection area 110 and the second connection area 120 are separated from each other and have a distance therebetween.

[0133] 4, for example, the second connection area 120 is sandwiched between every two first connection areas 110, and the first connection areas 110 and the second connection areas 120 are arranged in pairs in a staggered manner. That is, the first connection areas 110 and the second connection areas 120 are arranged one by one in a staggered manner. This makes it possible to reduce the parasitic inductance of the power module 1.

[0134] 6, in this embodiment, the main mounting area MA1 has a plurality of third connection areas 130 connected to the first connection port 11 of the first power input terminal 10. Specifically, each of the third connection areas 130 is connected to the first connection port 11.

[0135] The fourth sub-power area CD2 has a plurality of fourth connection areas 140 for connection to the second connection port 21 of the second power input terminal 20. Specifically, each of the fourth connection areas 140 is connected to the second connection port 21.

[0136] The third connection area 130 and the fourth connection area 140 are arranged in pairs in a staggered pattern on the first surface SF1 of the first main substrate 30 along the short side direction parallel to the first main substrate 30 and the second main substrate 40. The third connection area 130 and the fourth connection area 140 are separated from each other by a distance.

[0137] 6, the two fourth connection areas 140 adjacent to the long side of the first main substrate 30 are sandwiched between two different third connection areas 130, and the remaining fourth connection areas 140 (i.e., the fourth connection areas 140 away from the long side of the first main substrate 30) are each sandwiched between two third connection areas 130. This makes it possible to reduce the parasitic inductance of the power module 1.

[0138] 4 and 6, in this embodiment, the first power input terminal 10 and the second power input terminal 20 each have a connection base (not indicated by a reference numeral). The first connection port 11 of the first power input terminal 10 extends from the connection base of the first power input terminal 10.

[0139] The second connection port 21 of the second power input terminal 20 extends from the connection base of the second power input terminal 20. The connection bases of the first power input terminal 10 and the second power input terminal 20 may overlap.

[0140] 3 to 6, in this embodiment, the first main substrate 30 further has a first main control area CF1 located on the first surface SF1, and the second main substrate 40 has a second main control area CF2 located on the second surface SF2.

[0141] The first control terminal G1 of the first switch 50 is connected to the first main control area CF1. The second control terminal G2 of the second switch 60 is connected to the second main control area CF2. The first main control area CF1 and the second main control area CF2 are connected to the second conduction area CA2 of the first sub-bridge unit 71 and the second sub-bridge unit 72.

[0142] For example, as shown in Figures 3 and 4, in the first and second embodiments, the first main control area CF1 has two first sub-control areas located on both sides of the first main mounting area MA1 and adjacent to the long sides of the first main board 30.

[0143] The second main control area CF2 is located on both sides of the third sub-power area CE2 of the second main power supply area CE0, and has two second sub-control areas adjacent to the long side of the second main board 40.

[0144] The second conductive area CA2 of the first sub-bridge unit 71 and the second sub-bridge unit 72 has two second sub-conductive areas and is arranged along a longitudinal direction parallel to the first main board 30 and the second main board 40.

[0145] The first control terminal G1 of the first switch 50 is connected to the two first sub-control areas via a connecting member, the two first sub-control areas are connected to one of the two second sub-conductive areas of the second conductive area CA2 of one of the two second sub-bridge units 72 via a connecting member, and one of the two second sub-conductive areas of the second conductive area CA2 of one of the two second sub-bridge units 72 is connected to the first drive terminal 93 via a connecting member.

[0146] Here, one of the two second sub-conductive areas of the second conductive area CA2 of the two second sub-bridge units 72 are connected to each other.

[0147] For example, one end of the second sub-conductive area of ​​the second conductive area CA2 of one of the two second sub-bridge units 72 and one end of the two second sub-conductive areas of the second conductive area CA2 of the other of the two second sub-bridge units 72 are respectively connected to both ends of one of the two second sub-conductive areas of the second conductive area CA2 of the first sub-bridge unit 71, or one of the two second sub-conductive areas of the second conductive area CA2 of the second sub-bridge unit 72 is connected to one of the two second sub-conductive areas of the second conductive area CA2 of the first sub-bridge unit 71 through a connecting member. This allows the first control terminal G1 of the first switch 50 to obtain a first control signal from the first drive terminal 93.

[0148] Subsequently, the second control terminal G2 of the second switch 60 is connected to the two second sub-control areas through the connecting members. The two second sub-control areas are connected to the other of the two second sub-conductive areas of the second conductive area CA2 of the two second sub-bridge units 72 through the connecting members.

[0149] The other of the two second sub-conductive areas of the second conductive area CA2 of one of the two second sub-bridge units 72 is connected to a second drive terminal 94 via a connecting member.

[0150] Among these, the other of the two second sub-conductive areas of the two second sub-bridge units 72 are connected to each other (for example, one end of the two second sub-conductive areas of the second conductive area CA2 of one of the two second sub-bridge units 72 and an end of the two second sub-conductive areas of the other second conductive area CA2 of the two second sub-bridge units 72 are respectively connected to both ends of the other of the two second sub-conductive areas of the second conductive area of ​​the first sub-bridge unit 71, or the other of the two second sub-conductive areas of the second conductive area CA2 of the two second sub-bridge units 72 are connected to the other of the two second sub-conductive areas and the connecting member via the second conductive area CA2 of the first sub-bridge unit 71).

[0151] In this manner, the second control terminal G2 of the second switch 60 can obtain the second control signal from the second drive terminal 94.

[0152] As shown in FIG. 5, the difference between the first and second embodiments is that in the third embodiment, the first main mounting area MA1 surrounds the first main control area CF1 in a ring shape, and the second main mounting area MA2 surrounds the second main control area CF2.

[0153] The first control terminal G1 of the first switch 50 is connected to the first main control area CF1 via a connecting member, the first main control area CF1 is connected to the second conductive area CA2 of one of the two first sub-bridge units 71 via a connecting member, and the second conductive area CA2 of one of the two first sub-bridge units 71 is connected to the first drive terminal 93 via a connecting member.

[0154] This allows the first control terminal G1 of the first switch 50 to receive the first control signal from the first drive terminal 93.

[0155] The second control terminal G2 of the second switch 60 is connected to the second main control area CF2 via a connecting member, and the second main control area CF2 is connected to the second conductive area CA2 of the other of the two first sub-bridge units 71 via a connecting member.

[0156] The second conductive area CA2 of the other of the two first sub-bridge units 71 is connected to the second conductive area CA2 of the second sub-bridge unit 72 via a connecting member, and the second conductive area CA2 of the second sub-bridge unit 72 is connected to the second drive terminal 94 via a connecting member.

[0157] The second control terminal G2 of the second switch 60 can receive a second control signal from the second drive terminal 94.

[0158] As shown in Figure 6, the difference between the fourth embodiment and the first, second and third embodiments is that the first main mounting area MA1 surrounds the first main control area CF1, and the second main mounting area MA2 surrounds the second main control area CF2.

[0159] The first control terminal G1 of the first switch 50 is connected to the first main control area CF1 via a connection member.

[0160] The first main control area CF1 is connected to the second conductive area CA2 of one of the two first sub-bridge units 71 via a connecting member.

[0161] The second conductive area CA2 of one of the two first sub-bridge units 71 is connected to the second conductive area CA2 of one of the two second sub-bridge units 72 through a connecting member. The second conductive area CA2 of one of the two second sub-bridge units 72 is connected to the first driving terminal 93 through a conductive member. This allows the first control terminal G1 of the first switch 50 to obtain a first control signal from the first driving terminal 93.

[0162] The second control terminal G2 of the second switch 60 is connected to the second main control area CF2 via a connecting member, and the second main control area CF2 is connected to the second conductive area CA2 of the other of the two first sub-bridge units 71 via a connecting member.

[0163] The second conductive area CA2 of the other of the two first sub-bridge units 71 is connected to the second conductive area CA2 of the other of the two second sub-bridge units 72 via a connecting member.

[0164] The second conductive area CA2 of the other of the two second sub-bridge units 72 is connected to the second driving terminal 94 through the connecting member. In this manner, the second control terminal G2 of the second switch 60 can obtain a second control signal from the second driving terminal 94.

[0165] 4 and 5, a plurality of first resistors are provided in the first main control area CF1, and a plurality of second resistors are provided in the second main control area CF2. These first resistors correspond to the first switches 50 one by one, and these second resistors correspond to the second switches 60 one by one. Moreover, these first resistors have the same resistance value, and the second resistors also have the same resistance value.

[0166] As described above, in the switch circuit 80 (shown in FIG. 2), a first resistor is connected in series between the first control terminal G1 and the first drive terminal 93 of each first switch 50. This allows the switching speeds of all the first switches 50 to be consistent. A second resistor is connected in series between the second control terminal G2 and the second drive terminal 94 of each second switch 60, which allows the switching speeds of all the second switches 60 to be consistent.

[0167] 3 to 6, the first main substrate 30 further has a first main detection area CH1 located on the first surface SF1, and the second main substrate 40 has a second main detection area CH2 located on the second surface SF2.

[0168] A first output terminal S1 of the first switch 50 is connected to the first main detection area CH1, and a second output terminal S2 of the second switch 60 is connected to the second main detection area CH2.

[0169] The first main sensing area CH1 and the second main sensing area CH2 are connected to the third conductive area CA3 of the first sub-bridge unit 71 and the second sub-bridge unit 72.

[0170] For example, as shown in Figures 3 and 4, in the first and second embodiments, the first main detection area CH1 has two first sub-detection areas, which are located on both sides of the first main mounting area MA1 and adjacent to the long side edge of the first main substrate 30.

[0171] The second main detection area CH2 has two second sub-detection areas, which are located on either side of the third sub-power area CE2 of the second main power area CE0 and adjacent to the long side edge of the second main substrate 40.

[0172] The third conductive area CA3 of the first sub-bridge unit 71 and the second sub-bridge unit 72 has two third sub-conductive areas and is arranged along a longitudinal direction parallel to the first main substrate 30 and the second main substrate 40.

[0173] The first output terminal S1 of the first switch 50 is connected to the two first sub-sensing areas through a connecting member. The two first sub-sensing areas are connected to one of the two third sub-conducting areas of the third conductive area CA3 of the two second sub-bridge units 72 through a connecting member.

[0174] One of the two third sub-conductive areas of the third conductive area CA3 of one of the two second sub-bridge units 72 is connected to the first detection terminal 95 via a connecting member.

[0175] Here, one of the two third sub-conductive areas of the third conductive area CA3 of the two second sub-bridge units 72 is connected to each other. For example, one end of the two third sub-conductive areas of the third conductive area CA3 of one of the two second sub-bridge units 72 and one end of the two third sub-conductive areas of the other third conductive area CA3 of the two second sub-bridge units 72 are respectively connected to both ends of one of the two third sub-conductive areas of the third conductive area CA3 of the first sub-bridge unit 71. Or, one of the two third sub-conductive areas of the third conductive area CA3 of the two second sub-bridge units 72 is connected to one of the two third sub-conductive areas of the third conductive area CA3 of the first sub-bridge unit 71 via a connecting member.

[0176] This allows the first output signal from the first output terminal S 1 of the first switch 50 to be output to the first detection terminal 95 .

[0177] Subsequently, the second output terminal S2 of the second switch 60 is connected to two second sub-detection areas via connecting members.

[0178] The two second sub-sensing areas are connected to the other of the two third sub-conducting areas of the third conductive area CA3 of the two second sub-bridge units 72 through connecting members.

[0179] The other of the two third conductive areas of the third conductive area CA3 of one of the two second sub-bridge units 72 is connected to the second detection terminal 96 via a connecting member. The other of the two third sub-conductive areas of the third conductive area CA3 of the two second sub-bridge units 72 are connected to each other.

[0180] For example, the other end of the two third sub-conducting areas of any of the third conductive areas CA3 in the two second sub-bridge units 72 and the other end of the two third sub-conducting areas of the other third conductive area CA3 in the two second sub-bridge units 72 are respectively connected to both ends of the other of the two third sub-conducting areas of the third conductive area CA3 of the first sub-bridge unit 71. Or, the other of the two third sub-conducting areas of the third conductive area CA3 of the two second sub-bridge units 72 are connected to the other of the two third sub-conducting areas of the third conductive area CA3 of the first sub-bridge unit 71 via a connecting member.

[0181] This allows the second output signal from the second output terminal S 2 of the second switch 60 to be output to the second detection terminal 96 .

[0182] As shown in Figure 5, the difference between the first and second embodiments in the third embodiment is that the first main mounting area MA1 surrounds the first main detection area CH1 in a ring shape, and the second main mounting area MA2 surrounds the second main detection area CH2.

[0183] The first output terminal S1 of the first switch 50 is connected to the first main detection area CH1 through a connecting member. The first main detection area CH1 is connected to the third conductive area CA3 of one of the two first sub-bridge units 71 through a connecting member. The third conductive area CA3 of one of the two first sub-bridge units 71 is connected to the first detection terminal 95 through a conductive member. This allows the first output signal of the first output terminal S1 of the first switch 50 to be output to the first detection terminal 95.

[0184] The second output terminal S2 of the second switch 60 is connected to the second main detection area CH2 via a connecting member, and the second main detection area CH2 is connected to the third conductive area CA3 of the other of the two first sub-bridge units 71 via a connecting member.

[0185] The third conductive area CA3 of the other of the two first sub-bridge units 71 is connected to the third conductive area CA3 of the second sub-bridge unit 72 via a connecting member, and the third conductive area CA3 of the second sub-bridge unit 72 is connected to the second detection terminal 96 via a connecting member. This allows the second output signal of the second output terminal S2 of the second switch 60 to be output to the second detection terminal 96.

[0186] As shown in FIG. 6, the difference between the fourth embodiment and the first, second and third embodiments is that a first main mounting area MA1 surrounds a first main detection area CH1, and a second main mounting area MA2 surrounds the first main detection area CH1.

[0187] The first output terminal S1 of the first switch 50 is connected to the first main sensing area CH1 via a connecting member. The first main sensing area CH1 is connected to the third conductive area CA3 of one of the two first sub-bridge units 71 via a connecting member.

[0188] The third conductive area CA3 of one of the two first sub-bridge units 71 is connected to the third conductive area CA3 of one of the two second sub-bridge units 72 via a connecting member.

[0189] The third conductive area CA3 of one of the two second sub-bridge units 72 is connected to the first detection terminal 95 via the connection member. This allows the first output signal of the first output terminal S1 of the first switch 50 to be output to the first detection terminal 95.

[0190] The second output terminal S2 of the second switch 60 is connected to the second main detection area CH2 via a connecting member, and the second main detection area CH2 is connected to the third conductive area CA3 of the other of the two first sub-bridge units 71 via a connecting member.

[0191] The third conductive area CA3 of the other of the two first sub-bridge units 71 is connected to the third conductive area CA3 of the other of the two second sub-bridge units 72 via a connecting member, and the third conductive area CA3 of the other of the two second sub-bridge units 72 is connected to the second detection terminal 96 via a connecting member. This allows the second output signal of the second output terminal S2 of the second switch 60 to be output to the second detection terminal 96.

[0192] 3 to 5, in this embodiment, the power module 1 has a thermistor 99 for connection by a measurement device (e.g., a resistance measuring device). In this way, the measurement device obtains the temperature of the power module 1 from the change in resistance of the thermistor 99.

[0193] In this embodiment, the connecting member is made of a conductive material. Here, the conductive material may be a metal conductor or a metal wire strip, etc. In addition, the material of the metal conductor and the metal wire strip may be a conductive metal such as copper or aluminum.

[0194] As described above, according to this embodiment, the power module can withstand a larger current signal through the main bridge unit and is less susceptible to damage due to thermal stress.

[0195] In this embodiment, in addition to being able to transmit current signals of larger currents through the main bridge unit, other types of signals (e.g., source signals and gate signals of the first switch and the second switch) can be transmitted simultaneously between the first main board and the second main board. [Explanation of symbols]

[0196] 1 Power Module 10 First power input terminal 11 First connection port 20 Second power input terminal 21 Second connection port 30 First main board SF1 First Surface 40 Second main board SF2 Second Surface 50 First Switch G1 First control terminal D1 First input terminal S1 First output terminal 60 Second Switch G2 Second control terminal D2 Second input terminal S2 Second output terminal 70 Main Bridge Unit 71 First Sub-Bridge Unit 72 Second Sub-Bridge Unit CA1 (first conductive area) CA2 (second conductive area) CA3 (third conductive area) SF3 bottom surface SF4 top surface 80 Switch Circuit 81 Upper arm circuit 82 Lower arm circuit AA current path 91, 92 Power output terminals 93 First drive terminal 94 Second drive terminal 95 First detection terminal 96 Second detection terminal 97 Power supply current terminal MA1 1st main mounting area MA2 Second main mounting area CD0 1st main power area CD1 1st sub-power area CD2 4th sub-power area CE0 Second main power area CE1 Second sub-power area CE2 3rd sub-power area CE3 5th sub-power area CF1 First main control area CF2 Second main control area CH1 1st main detection area CH2 Second main detection area L1, L2 axis 99 Thermistor 110 First Connection Area 120 Second Connection Area 130 Third Connection Area 140 4th Connection Area

Claims

1. A power module including a first power input terminal, a second power input terminal, a first main board, a second main board, a plurality of first switches, a plurality of second switches, and a main bridge unit, the first power input terminal has a plurality of first connection ports; the second power input terminal has a plurality of second connection ports; the first main substrate having a first surface; the second main substrate has a second surface; a plurality of the first switches each having a first control terminal, a first input terminal, and a first output terminal; a plurality of said second switches each having a second control terminal, a second input terminal, and a second output terminal; The main bridge unit has at least one first sub-bridge unit and at least one second sub-bridge unit, and bridges the first surface and the second surface; each of the first sub-bridge unit and the second sub-bridge unit has a bottom surface, a top surface opposite the bottom surface, a first conductive area, a second conductive area, and a third conductive area; the bottom surface faces the first surface and the second surface, the first conductive area is located on the bottom surface, and the second conductive area and the third conductive area are located on the top surface; The first conductive area of ​​at least one of the first sub-bridge units is connected between a plurality of the first output terminals of a plurality of the first switches and a plurality of the second input terminals of a plurality of the second switches; The first conductive area of ​​at least one of the second sub-bridge units is connected between the first input terminals of the first switches and the first power supply input terminal, or between the second output terminals of the second switches and the second power supply input terminal, and transmits a current signal between the first power supply input terminal, the first switches, the second switches, and the second power supply input terminal; The second conductive areas of at least one of the first sub-bridge units and the second sub-bridge units are connected to the first control terminals of the first switches and the second control terminals of the second switches, and transmit control signals of the first switches and the second switches; a plurality of third conductive areas of at least one of the first sub-bridge units and at least one of the second sub-bridge units are connected to a plurality of first output terminals of a plurality of the first switches and a plurality of second output terminals of a plurality of the second switches, and transmit output signals of the plurality of the first switches and the plurality of the second switches.

2. 2. The power module according to claim 1, wherein the first connection ports and the second connection ports are arranged in a staggered pattern in pairs on the first surface of the first main substrate or the second surface of the second main substrate along a short side direction parallel to the first main substrate and the second main substrate.

3. 2. The power module according to claim 1, wherein at least one of the first sub-bridge units and at least one of the second sub-bridge units are arranged along a short side direction parallel to the first main board and the second main board.

4. the first main substrate further includes a first main mounting area located on the first surface; the second main substrate further includes a second main mounting area located on the second surface; 2. The power module according to claim 1, wherein a plurality of the first input terminals of a plurality of the first switches are connected to the first main mounting area, and a plurality of the second input terminals of a plurality of the second switches are connected to the second main mounting area.

5. The first main board further includes a first main power area located on the first surface, the first main power area including at least one first sub-power area, and connecting a plurality of the first output terminals of a plurality of the first switches; The power module according to claim 4, characterized in that at least one of the first sub-bridge units is connected to at least one of the first sub-power supply areas and the second main mounting area on both sides of the first conduction area.

6. 6. The power module of claim 5, wherein at least one of the first sub-power areas is adjacent to the first main mounting area.

7. Further comprising two power output terminals; 6. The power module according to claim 5, wherein the first conductive area of ​​at least one of the second sub-bridge units is connected between the first input terminals of the first switches and the first power input terminal, and the two power output terminals are connected to at least one of the first sub-power areas of the first main power area.

8. the second main board further comprises a second main power area located on the second surface; 6. The power module according to claim 5, wherein the second main power area has at least one second sub-power area, and connects the second output terminals of the second switches to the second power input terminal.

9. 9. The power module of claim 8, wherein at least one of the second sub-power areas is adjacent to the second main mounting area.

10. the first conductive area of ​​at least one of the second sub-bridge units connects between the first input terminals of the first switches and the first power supply input terminal; the second main power supply area has at least one third sub-power supply area, which is connected to a plurality of the first connection ports of the first power supply input terminal; 9. The power module according to claim 8, wherein both sides of the first conductive area of ​​at least one of the second sub-bridge units are respectively connected to the first main mounting area and to at least one of the third sub-power areas.

11. 11. The power module of claim 10, wherein at least one of the third sub-power areas surrounds the second main mounting area and the at least one of the second sub-power areas to form an open ring shape with a gap, and the main bridge unit is adjacent to the gap.

12. At least one of the second sub-power areas has a plurality of first connection areas and is connected to a plurality of the second connection ports of the second power input terminal; At least one of the third sub-power areas has a plurality of second connection areas and is connected to a plurality of the connection ports of the first power input terminal; 11. The power module according to claim 10, wherein the first connection areas and the second connection areas are arranged in pairs in a staggered pattern on the second surface of the second main substrate along a short side direction parallel to the first main substrate and the second main substrate.

13. The first conductive area of ​​at least one of the second sub-bridge units connects between the second output terminals of the second switches and the second power supply input terminal; At least one of the second sub-power areas of the second main power area is connected to a plurality of the second output terminals of a plurality of the second switches; 9. The power module according to claim 8, wherein the first main power supply area has at least one fourth sub-power supply area and is connected to a plurality of the second connection ports of the second power supply input terminal, and both sides of the first conductive area of ​​at least one second sub-bridge unit are respectively connected to at least one of the second sub-power supply area and at least one of the fourth sub-power supply area.

14. 14. The power module of claim 13, wherein at least one of the fourth power sub-areas is adjacent to at least one of the first power sub-areas.

15. the first main mounting area has a plurality of third connection areas and is connected to a plurality of first connection ports of the first power input terminal; at least one fourth sub-power area has a plurality of fourth connection areas and is connected to a plurality of second connection ports of the second power input terminal; 14. The power module according to claim 13, wherein the third connection areas and the fourth connection areas are arranged in pairs in a staggered pattern on the first surface of the first main substrate along a short side direction parallel to the first main substrate and the second main substrate.

16. Further comprising two power output terminals; 9. The power module according to claim 8, wherein the first conductive area of ​​at least one of the second sub-bridge units connects between the second output terminals of the second switches and the second power supply input terminal, and two of the power supply output terminals are connected to the second main mounting area.

17. 17. The power module according to claim 16, wherein the second main power supply area has at least one fifth sub-power supply area, two of the power output terminals are connected to at least one of the fifth sub-power supply areas, and at least one of the fifth sub-power supply areas is connected to the second main mounting area.

18. 18. The power module of claim 17, wherein at least one of the fifth power sub-areas is adjacent to at least one of the second power sub-areas.

19. the first main board further comprises a first main control area located on the first surface; the second main board further comprises a second main control area located on the second surface; a plurality of the first control terminals of a plurality of the first switches are connected to the first main control area; a plurality of second control terminals of a plurality of second switches are connected to the second main control area; 2. The power module of claim 1, wherein the first main control area and the second main control area connect a plurality of the second conductive areas of at least one of the first sub-bridge units and at least one of the second sub-bridge units.

20. the first main substrate further comprises a first main detection area located on the first surface; the second main substrate further comprises a second main detection area located on the second surface; a plurality of first output terminals of a plurality of first switches are connected to the first main detection area; a plurality of second output terminals of a plurality of second switches are connected to the second main detection area; 2. The power module of claim 1, wherein the first main sensing area and the second main sensing area are connected to a plurality of the third conductive areas of at least one of the first sub-bridge units and at least one of the second sub-bridge units.

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