WO2019041292A1 - 一种平行电极组合、功率模块及功率模组 - Google Patents

一种平行电极组合、功率模块及功率模组 Download PDF

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Publication number
WO2019041292A1
WO2019041292A1 PCT/CN2017/100105 CN2017100105W WO2019041292A1 WO 2019041292 A1 WO2019041292 A1 WO 2019041292A1 CN 2017100105 W CN2017100105 W CN 2017100105W WO 2019041292 A1 WO2019041292 A1 WO 2019041292A1
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Prior art keywords
electrode
power module
capacitor
flows
half bridge
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PCT/CN2017/100105
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English (en)
French (fr)
Inventor
徐文辉
王玉林
滕鹤松
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扬州国扬电子有限公司
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Application filed by 扬州国扬电子有限公司 filed Critical 扬州国扬电子有限公司
Priority to EP17923400.0A priority Critical patent/EP3637463A4/en
Priority to US16/631,839 priority patent/US11127659B2/en
Publication of WO2019041292A1 publication Critical patent/WO2019041292A1/zh

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Definitions

  • the invention relates to a parallel electrode assembly, a power module and a power module.
  • the stray inductance of existing power electronic power modules and power modules tends to be relatively large.
  • the reason for this is that the stray inductance of the electrodes accounts for a large part, which causes large overshoot voltage and increased loss, and also Limits the application in high switching frequency applications.
  • the parallel electrode assembly of the present invention includes a first power module electrode and a second power module electrode, and the soldering portion of the first power module electrode and the soldering portion of the second power module electrode are respectively connected to the internal of the power module
  • the power copper layer has a connection portion of the first power module electrode and a connection portion of the second power module electrode in parallel.
  • first power module electrode connection portion and the second power module electrode connection portion are respectively provided with connection holes. This can be fixed by the fixing device through the connecting hole.
  • first power module electrode connection portion and the second power module electrode connection portion have different lengths.
  • connection hole of the first power module electrode connection portion has a connection hole for engaging a nut or a bolt head
  • connection hole of the second power module electrode connection portion has a nut for engaging or The connecting hole of the bolt head. This allows the nut or bolt head to be embedded inside the connecting hole, and the bolt will not loosen even if the surrounding insulating material softens. If the nut or bolt head is fastened over the connecting hole, the bolt is easily loosened once the surrounding insulating material softens.
  • the power module using the parallel electrode combination of the present invention comprises an upper half bridge substrate and a lower half bridge substrate, wherein the upper half bridge substrate is provided with an upper half bridge IGBT chip and an upper half bridge diode chip, and the lower half bridge substrate is provided
  • the lower half bridge IGBT chip and the lower half bridge diode chip, the first power module electrode and the second power module electrode respectively serve as positive and negative electrodes, and further include an output electrode;
  • the working current path of the upper half bridge IGBT chip after being turned on is: working current Flowing from the first power module electrode connection portion, flowing into the upper half bridge substrate through the bonding wire, flowing through the upper half bridge IGBT chip and flowing out to the output electrode through the bonding wire;
  • the freewheeling current path after the upper half bridge IGBT chip is turned off The current of the freewheeling current flows from the electrode connection portion of the second power module, flows into the lower half bridge substrate through the bonding wire, flows through the lower half bridge diode chip, and then flows out to the output electrode through the
  • the output current path of the lower half bridge IGBT chip is: the freewheeling current flows from the first power module electrode connection portion, flows into the upper half bridge substrate through the bonding wire, passes through the upper half bridge diode chip, passes through The binding line flows out to Output electrode.
  • This single-sided heat dissipation module can effectively reduce stray inductance.
  • the power module adopting the parallel electrode combination of the present invention comprises a bottom substrate and a top substrate, an upper half bridge chip and an intermediate substrate are disposed on the bottom substrate, and a lower half bridge chip, a first power module electrode and a first substrate are disposed on the intermediate substrate
  • the two power module electrodes respectively serve as positive and negative electrodes, and further comprise an output electrode; in operation, the working current flows from the first power module electrode connection portion into the bottom substrate, flows through the upper half bridge chip, flows to the top substrate, and then connects through the output electrode.
  • the freewheeling current flows from the second power module electrode connection portion, flows through the top substrate to the lower half bridge chip, then flows into the intermediate substrate, flows to the top substrate, and flows out through the output electrode connection portion.
  • the double-sided heat-dissipating power module can effectively reduce the stray inductance, and the intermediate substrate is disposed on the bottom substrate to reduce the stray inductance.
  • a surface of the bottom substrate is provided with a positive electrode copper layer
  • a lower surface of the top substrate is provided with a separated negative electrode copper layer and an output electrode copper layer
  • a first connecting block is disposed between the upper half bridge chip and the output electrode copper layer.
  • a second connecting block is disposed between the lower half bridge chip and the negative electrode copper layer, and a connecting post is further disposed between the intermediate substrate and the output electrode copper layer; during operation, the working current flows from the first power module electrode connecting portion, and passes through The positive electrode copper layer flows into the upper half bridge chip, flows through the first connection block to the output electrode copper layer, and finally flows out from the output electrode connection portion; when freewheeling, the freewheeling current flows from the second power module electrode connection portion through the negative
  • the electrode copper layer flows into the second connecting block, flows to the lower half bridge chip, then flows to the intermediate substrate, and then flows into the output electrode copper layer through the connecting post, and finally flows out from the output electrode connecting portion.
  • a power module using the parallel electrode combination of the present invention comprises a capacitor having a combination of a capacitor electrode and a power module having a combination of power module electrodes, the capacitor electrode combination comprising a first capacitor electrode and a second capacitor electrode facing in parallel, A capacitor electrode and a second capacitor electrode are respectively connected to the positive and negative electrodes of the capacitor core group, and the power module electrode combination is the parallel electrode combination, and the first power module electrode connection portion and the second power module electrode connection portion can be inserted into the first capacitor electrode In the gap between the second capacitor electrode.
  • first capacitor electrode portion is convex
  • second capacitor electrode is also partially convex.
  • the protrusion of the first capacitor electrode and the protrusion of the second capacitor electrode form a receiving cavity, and the connection portion of the power module electrode combination can Insert into the receiving chamber.
  • first capacitor electrode and the second capacitor electrode are both located in the middle of the side of the capacitor. This makes the positive and negative current path lengths equal, which can further reduce the stray inductance.
  • first capacitor electrode and the second capacitor electrode are both plate-shaped. This effectively increases the facing area between the first capacitor electrode and the second capacitor electrode, further reducing the stray inductance.
  • a power module using the parallel electrode combination of the present invention comprises a capacitor having a combination of a capacitor electrode and a power module having a combination of power module electrodes, the capacitor electrode combination comprising a first capacitor electrode and a second capacitor electrode, the first capacitor electrode
  • the soldering portion of the soldering portion and the second capacitor electrode are respectively connected to the positive and negative electrodes of the capacitor core group, the soldering portion of the first capacitor electrode leads to the connection portion of the first capacitor electrode, and the soldering portion of the second capacitor electrode leads to the connection of the second capacitor electrode a connecting portion of the first capacitor electrode and the connecting portion of the second capacitor electrode are parallel to each other, and a connecting hole is disposed on the first capacitor electrode connecting portion and the second capacitor electrode connecting portion, and the power module electrode combination is the parallel
  • the electrode combination, the connection portion of the power module electrode combination is adapted to the connection portion of the capacitor electrode combination.
  • the welded portion of the first capacitor electrode and the welded portion of the second capacitor electrode are disposed in parallel with each other. This can further reduce stray inductance.
  • the welded portion of the first capacitor electrode and the welded portion of the second capacitor electrode are both plate-shaped. This effectively increases the facing area between the first capacitor electrode soldering portion and the second capacitor electrode soldering portion, further reducing stray inductance.
  • soldering portion of the first capacitor electrode and the solder portion of the second capacitor electrode are located in the middle of the capacitor side. This makes the positive and negative current path lengths equal, which can further reduce the stray inductance.
  • the present invention discloses a parallel electrode assembly in which a connection portion of a first power module electrode and a connection portion of a second power module electrode are aligned in parallel, and such a structure has never appeared in the prior art, compared to the prior art.
  • Technology can greatly reduce stray inductance, which is undoubtedly a huge advancement in the field.
  • the invention also discloses a power module and a power module using the parallel electrode combination, which can greatly reduce stray inductance.
  • FIG. 1 is a structural diagram of a power module according to Embodiment 1 of the present invention.
  • FIG. 2 is a partial enlarged view of a power module according to Embodiment 1 of the present invention.
  • FIG. 3 is a structural diagram of a capacitor electrode connection portion according to Embodiment 1 of the present invention.
  • FIG. 4 is a structural diagram of a power module according to Embodiment 1 of the present invention.
  • FIG. 5 is a structural diagram of an electrode connection portion of a first power module according to Embodiment 1 of the present invention.
  • FIG. 6 is a schematic diagram of a power module using a single-sided heat dissipation structure according to Embodiment 1 of the present invention.
  • Figure 6 (a) is a schematic view of the splitting of the upper and lower half bridges
  • Figure 6 (b) is the upper half bridge current path diagram
  • Figure 6 (c) is a lower half bridge current path diagram
  • FIG. 7 is a schematic diagram of a power module according to Embodiment 1 of the present invention adopting a double-sided heat dissipation structure
  • FIG. 9 is a structural diagram of a power module according to Embodiment 2 of the present invention.
  • FIG. 10 is a partial enlarged view of a power module according to Embodiment 2 of the present invention.
  • FIG. 11 is a schematic diagram of a power module using a single-sided heat dissipation structure according to Embodiment 2 of the present invention.
  • Figure 11 (a) is a schematic view of the splitting of the upper and lower half bridges
  • Figure 11 (b) is the upper half bridge current path diagram
  • Figure 11 (c) is a lower half bridge current path diagram
  • FIG. 12 is a schematic diagram of a dual-sided heat dissipation structure of a power module according to Embodiment 2 of the present invention.
  • FIG. 13 is a structural diagram of a power module according to Embodiment 3 of the present invention.
  • FIG. 14 is a partial enlarged view of a power module according to Embodiment 3 of the present invention.
  • FIG. 15 is a separation diagram of a power module according to Embodiment 3 of the present invention.
  • FIG. 16 is a schematic diagram of a power module using a single-sided heat dissipation structure according to Embodiment 3 of the present invention.
  • Figure 16 (a) is a schematic view of the splitting of the upper and lower half bridges
  • Figure 16 (b) is a diagram of the upper half bridge current path
  • Figure 16 (c) is a lower half bridge current path diagram
  • FIG. 17 is a schematic diagram of a power module according to Embodiment 3 of the present invention adopting a double-sided heat dissipation structure
  • FIG. 18 is a structural diagram of a power module according to Embodiment 4 of the present invention.
  • FIG. 19 is a partial enlarged view of a power module according to Embodiment 4 of the present invention.
  • FIG. 21 is a schematic diagram of a power module using a single-sided heat dissipation structure according to Embodiment 4 of the present invention.
  • Figure 21 (a) is a schematic view of the splitting of the upper and lower half bridges
  • Figure 21 (b) is a diagram of the upper half bridge current path
  • Figure 21 (c) is a lower half bridge current path diagram
  • FIG. 22 is a schematic diagram of a power module according to Embodiment 4 of the present invention adopting a double-sided heat dissipation structure.
  • Embodiment 1 discloses a power module having a parallel mounted electrode combination, as shown in FIGS. 1-5, including a capacitor having a combination of capacitor electrodes and a power module having a combination of power module electrodes.
  • the capacitor electrode assembly includes a first capacitor electrode and a second capacitor electrode.
  • the solder portion 112 of the first capacitor electrode is connected to the cathode of the capacitor core group 111.
  • the solder portion 113 of the second capacitor electrode is connected to the anode of the capacitor core group 111.
  • the soldering portion 112 and the second capacitor electrode soldering portion 113 are both plate-shaped and located in the middle of the side of the capacitor.
  • the soldering portion 112 of the first capacitor electrode leads to the connecting portion 114 of the first capacitor electrode, and the soldering portion 113 of the second capacitor electrode leads to the second portion.
  • the connecting portion 115 of the capacitor electrode, the connecting portion 114 of the first capacitor electrode and the connecting portion 115 of the second capacitor electrode are parallel to each other and the connecting portion 114 of the first capacitor electrode is longer than the connecting portion 115 of the second capacitor electrode, the first capacitor
  • the electrode connecting portion 114 is provided with two first connecting holes 1141 and two second connecting holes 1142.
  • the two first connecting holes 1141 are arranged side by side at the first capacitive electrode connecting portion 114 and connected to the first capacitive electrode soldering portion 112.
  • the power module electrode combination includes a first power module electrode and a second power module electrode, and the soldering portion of the first power module electrode and the soldering portion of the second power module electrode are respectively connected to the power copper layer inside the power module, and the first power module electrode
  • the soldering portion 118 leads out the first power module electrode connecting portion 116
  • the second power module electrode soldering portion leads out the second power module electrode connecting portion 117.
  • the connecting portion 116 of the first power module electrode is parallel to the connecting portion 117 of the second power module electrode.
  • the connecting portion 116 of the first power module electrode is longer than the connecting portion 117 of the second power module electrode.
  • the first power module electrode connecting portion 116 is provided with two fourth connecting holes 1161 and two fifth connecting holes 1162.
  • the two fourth connecting holes 1161 are arranged side by side at one end of the first power module electrode connecting portion 116 and the first power module electrode welding portion 118.
  • the two fifth connecting holes 1162 are arranged side by side at the first power module electrode connecting portion 116.
  • the other end of the second power module electrode connecting portion 117 is provided with two sixth connecting holes 1171.
  • the first connection hole 1141 and the fourth connection hole 1161 are larger than the other connection holes.
  • the capacitor and the power module are usually fixed by bolts and nuts, and a three-layer structure is formed when fixed.
  • the first capacitor electrode connecting portion 114 and the first power module electrode connecting portion 116 are located at two.
  • the second capacitor electrode connecting portion 115 and the second power module electrode connecting portion 117 are both located in the middle.
  • the two methods are as follows: 1) inserting a nut into the first connecting hole 1141, and the body of the bolt matched with the nut passes through the fifth connecting hole 1162 and the third connecting hole 1151.
  • the nut is fixed tightly; the nut is embedded in the fourth connecting hole 1161, and the body of the bolt matched with the nut penetrates through the second connecting hole 1142 and the sixth connecting hole 1171 so as to be fixed to the nut. 2) inserting the bolt head into the first connecting hole 1141, the body of the bolt penetrating through the fifth connecting hole 1162 and the third connecting hole 1151, and the nut is fixed to the bolt at the fifth connecting hole 1162; In the four connecting holes 1161, the body of the bolt penetrates the second connecting hole 1142 and the sixth connecting hole 1171, and the nut is fixed to the bolt at the second connecting hole 1142.
  • the power module can adopt a single-sided heat dissipation structure or a double-sided heat dissipation structure.
  • the following describes the scheme of using a single-sided heat dissipation structure and a double-sided heat dissipation structure.
  • the power module can adopt a single-sided heat dissipation structure, including an upper half bridge substrate 121 and a lower half bridge substrate 122, and the upper half of the upper bridge substrate 121 is provided with a top half.
  • the upper half-bridge substrate 121 has a three-layer structure, the middle layer is an upper half-bridge substrate insulating layer, and the upper and lower layers are upper half-bridge substrate metal layers.
  • the lower half-bridge substrate 122 may have a two-layer structure, the upper layer is the lower half-bridge substrate metal layer, and the lower layer is the lower half-bridge substrate insulating layer 124.
  • the lower half-bridge substrate 122 may also have a three-layer structure, the middle layer is the lower half-bridge substrate insulating layer 124, and the upper and lower layers are the lower half-bridge substrate metal layers.
  • the power module is split into Figures 6(b) and 6(c).
  • 6(b) shows the operating current path after the upper half-bridge IGBT chip 1231 is turned on, and the operating current flows from the first power module electrode connecting portion 116, flows into the upper-half bridge substrate 121 through the bonding wire, and flows through The half bridge IGBT chip 1231 then flows out to the output electrode 137 through the bonding wire.
  • 6(c) shows the freewheeling current path after the upper half-bridge IGBT chip 1231 is turned off, and the freewheeling current flows from the second power module electrode connection portion 117, flows into the lower half-bridge substrate 122 through the bonding wire, and flows through The lower half bridge diode chip 1234 then flows out to the output electrode 137 through the bonding wire.
  • the operating current path after the lower half-bridge IGBT chip 1232 is turned on is that the operating current flows from the second power module electrode connection portion 117, flows into the lower half-bridge substrate 122 through the bonding wire, passes through the lower half-bridge IGBT chip 1232, and passes through The binding line flows out to the output electrode 137;
  • the freewheeling current path after the lower half bridge IGBT chip 1232 is turned off is: the freewheeling current flows from the first power module electrode connecting portion 116, and flows into the upper half bridge substrate 121 through the bonding wire. After flowing through the upper half bridge diode chip 1233, it flows out to the output electrode 137 through the bonding wire.
  • the power module can adopt a double-sided heat dissipation structure, including a bottom substrate 131, an intermediate substrate 132, and a top substrate 133.
  • the copper layer on the upper surface of the bottom substrate 131 is a positive electrode copper layer 1311
  • the lower surface of the top substrate 133 has a bottom surface.
  • An upper half bridge chip 1381 is disposed on the positive electrode copper layer 1311
  • a first connection block 134 is disposed between the upper half bridge chip 1381 and the output electrode copper layer 1332
  • an intermediate substrate 132 is further disposed on the positive electrode copper layer 1311.
  • a lower half bridge chip 1382 is disposed on the 132, a second connection block 135 is disposed between the lower half bridge chip 1382 and the negative electrode copper layer 1331, and a connection post 136 is further disposed between the intermediate substrate 132 and the output electrode copper layer 1332.
  • the first power module electrode serves as a positive electrode
  • the second power module electrode serves as a negative electrode
  • the first power module electrode connection portion 116 is connected to the positive electrode copper layer 1311
  • the second power module electrode connection portion 117 is connected to the negative electrode copper layer 1331
  • the output electrode connection portion 1371 is connected to the output electrode copper layer 1332.
  • Figure 7 also shows the current path diagram during operation and freewheeling.
  • the operating current flows from the first power module electrode connection portion 116, flows into the upper half bridge chip 1381 through the positive electrode copper layer 1311, flows through the first connection block 134 to the output electrode copper layer 1332, and finally from the output electrode connection portion. 1371 outflow.
  • a freewheeling current flows from the second power module electrode connection portion 117, flows into the second connection block 135 through the negative electrode copper layer 1331, flows to the lower half bridge chip 1382, then flows to the intermediate substrate 132, and then passes through the connection.
  • the column 136 flows into the output electrode copper layer 1332, and finally flows out of the output electrode connection portion 1371.
  • the power module of the prior art is shown in Figure 8.
  • the two power module electrode connections are arranged side by side without any overlap between them.
  • the power module adopting the double-sided heat dissipation structure is compared with the power module of the prior art, and the simulation results are shown in Table 1.
  • the stray inductance of the prior art power module is 12.99 nH
  • the stray inductance of the double-sided heat dissipation power module is only 3.28 nH
  • the embodiment 1 greatly reduces the stray inductance, which is also adopted.
  • Stray inductance is a critical parameter for the power module.
  • the size of the stray inductance directly affects the performance of the power module. In general, it is difficult to reduce the stray inductance of a few nH, like this embodiment. It is a very rare breakthrough to reduce the stray inductance of nearly 10nH! It is very important for the development of the power module industry!
  • Embodiment 2 discloses a power module having a parallel flat-pin electrode combination, as shown in FIG. 9, including a capacitor having a combination of capacitor electrodes and a power module having a combination of power module electrodes.
  • the capacitor electrode assembly includes a first capacitor electrode 212 and a second capacitor electrode 213 that are parallel to each other.
  • the first capacitor electrode 212 and the second capacitor electrode 213 are both plate-shaped and located in the middle of the capacitor side, and the first capacitor electrode 212 and the second capacitor The electrodes 213 are respectively connected to the positive and negative poles of the capacitor core group 211. As shown in FIG.
  • the power module electrode assembly includes a first power module electrode and a second power module electrode, and the first power module electrode soldering portion and the second power module electrode soldering portion are respectively connected to the power copper layer inside the power module, and the first power module electrode connecting portion 214 Parallel to the second power module electrode connection portion 215, the first power module electrode connection portion 214 and the second power module electrode connection portion 215 can be inserted into the accommodating cavity.
  • the power module can adopt a single-sided heat dissipation structure or a double-sided heat dissipation structure.
  • the following describes the scheme of using a single-sided heat dissipation structure and a double-sided heat dissipation structure.
  • the power module can adopt a single-sided heat dissipation structure, including The upper half bridge substrate 221 and the lower half bridge substrate 222, the upper half bridge substrate 221 is provided with an upper half bridge IGBT chip 2231 and an upper half bridge diode chip 2233, and the lower half bridge substrate 222 is provided with a lower half bridge IGBT chip 2232 and lower
  • the half bridge diode chip 2234 has a first power module electrode as a positive electrode, a second power module electrode as a negative electrode, and an output electrode 237.
  • the upper half-bridge substrate 221 has a three-layer structure, the middle layer is an upper half-bridge substrate insulating layer, and the upper and lower layers are upper half-bridge substrate metal layers.
  • the lower half-bridge substrate 222 may have a two-layer structure, the upper layer is the lower half-bridge substrate metal layer, and the lower layer is the lower half-bridge substrate insulating layer 224.
  • the lower half-bridge substrate 222 may also be a three-layer structure.
  • the middle layer is the lower half-bridge substrate insulating layer 224, and the upper and lower layers are the lower half-bridge substrate metal layers.
  • the power module is split into Figures 11(b) and 11(c).
  • 11(b) shows the operating current path after the upper half-bridge IGBT chip 2231 is turned on, the operating current flows from the first power module electrode connection portion 214, flows into the upper-half bridge substrate 221 through the bonding wire, and flows through The half-bridge IGBT chip 2231 then flows out to the output electrode 237 through the bonding wire.
  • 11(c) shows the freewheeling current path after the upper half-bridge IGBT chip 2231 is turned off, and the freewheeling current flows from the second power module electrode connection portion 215, flows into the lower half-bridge substrate 222 through the bonding wire, and flows through The lower half bridge diode chip 2234 then flows out to the output electrode 237 through the bonding wire.
  • the operating current path after the lower half-bridge IGBT chip 2232 is turned on is: the operating current flows from the second power module electrode connection portion 215, flows into the lower half-bridge substrate 222 through the bonding wire, passes through the lower half-bridge IGBT chip 2232, passes through The binding line flows out to the output electrode 237;
  • the freewheeling current path after the lower half bridge IGBT chip 2232 is turned off is: the freewheeling current flows from the first power module electrode connection portion 214, and flows into the upper half bridge substrate 221 through the bonding wire. After flowing through the upper half bridge diode chip 2233, it flows out to the output electrode 237 through the bonding wire.
  • the power module can adopt a double-sided heat dissipation structure, including a bottom substrate 231, an intermediate substrate 232, and a top substrate 233.
  • the copper layer on the upper surface of the bottom substrate 231 is a positive electrode copper layer 2311
  • the lower surface of the top substrate 233 has a bottom surface.
  • An upper half bridge chip 2381 is disposed on the positive electrode copper layer 2311
  • a first connection block 234 is disposed between the upper half bridge chip 2381 and the output electrode copper layer 2332
  • an intermediate substrate 232 is further disposed on the positive electrode copper layer 2311.
  • a lower half bridge chip 2382 is disposed on the 232, a second connection block 235 is disposed between the lower half bridge chip 2382 and the negative electrode copper layer 2331, and a connection post 236 is further disposed between the intermediate substrate 232 and the output electrode copper layer 2332.
  • the first power module electrode serves as a positive electrode
  • the second power module electrode serves as a negative electrode
  • the first power module electrode connection portion 216 is connected to the positive electrode copper layer 2311
  • the second power module electrode connection portion 217 is connected to the negative electrode copper layer 2331
  • the output electrode connection portion 2371 is connected to the output electrode copper layer 2332.
  • Figure 12 also shows current path diagrams during operation and freewheeling.
  • the operating current flows from the first power module electrode connection portion 216, flows into the upper half bridge chip 2381 through the positive electrode copper layer 2311, flows to the output electrode copper layer 2332 through the first connection block 234, and finally passes through the output electrode connection portion. 2371 outflow.
  • the freewheeling current flows from the second power module electrode connection portion 217, flows into the second connection block 235 through the negative electrode copper layer 2331, flows to the lower half bridge chip 2382, then flows to the intermediate substrate 232, and then passes through the connection.
  • the column 236 flows into the output electrode copper layer 2332, and finally flows out of the output electrode connection portion 2371.
  • the power module of the prior art is shown in Figure 8.
  • the two power module electrode connections are arranged side by side without any overlap between them.
  • This embodiment will use a power module with a double-sided heat dissipation structure and the work of the prior art.
  • the rate module is simulated and compared, and the simulation results are shown in Table 2.
  • the stray inductance of the prior art power module is 12.99 nH
  • the stray inductance of the double-sided heat dissipation power module is only 3.43 nH, that is, the embodiment 2 greatly reduces the stray inductance, which is also adopted.
  • Stray inductance is a critical parameter for the power module.
  • the size of the stray inductance directly affects the performance of the power module. In general, it is difficult to reduce the stray inductance of a few nH, like this embodiment. It is a very rare breakthrough to reduce the stray inductance of nearly 10nH! It is very important for the development of the power module industry!
  • Embodiment 3 discloses a power module having a parallel coaxial mounting electrode combination, as shown in FIG. 13, including a capacitor having a combination of capacitor electrodes and a power module having a combination of power module electrodes.
  • the capacitor electrode combination includes a first capacitor electrode and a second capacitor electrode.
  • the soldering portion 312 of the first capacitor electrode and the soldering portion 313 of the second capacitor electrode are respectively connected to the positive and negative electrodes of the capacitor core group 311, and the soldering portion 312 of the first capacitor electrode leads to the connecting portion 314 of the first capacitor electrode, and the second capacitor electrode
  • the soldering portion 313 leads the connection portion 315 of the second capacitor electrode.
  • the first capacitor electrode soldering portion 312 and the second capacitor electrode soldering portion 313 are both plate-shaped and located between the sides of the capacitor.
  • the first capacitor electrode connecting portion 314 and the second capacitor electrode connecting portion 315 are parallel to each other.
  • the first capacitor electrode connecting portion 314 is provided with a first connecting hole 3141 and a second connecting hole 3142, and a second capacitor.
  • the electrode connecting portion 315 is provided with a third connecting hole and a fourth connecting hole.
  • the power module electrode combination includes a first power module electrode and a second power module electrode.
  • the soldering portion of the first power module electrode and the soldering portion of the second power module electrode are respectively connected to the power copper layer inside the power module, the first power module electrode soldering portion leads out the first power module electrode connecting portion 316, and the second power module electrode is soldered
  • the second power module electrode connection portion 317 is led out, and the first power module electrode connection portion 316 is parallel to the second power module electrode connection portion 317.
  • the first power module electrode connection portion 316 is provided with a first
  • the fifth connection hole 3161 and the sixth connection hole 3162 are provided with a seventh connection hole and an eighth connection hole on the second power module electrode connection portion 317.
  • connection hole 3141, the fifth connection hole 3161, the seventh connection hole, and the third connection hole are all coaxially disposed, and the second connection hole 3142, the sixth connection hole 3162, the eighth connection hole, and the fourth connection hole are both Coaxial settings.
  • the power module can adopt a single-sided heat dissipation structure or a double-sided heat dissipation structure.
  • the following describes the scheme of using a single-sided heat dissipation structure and a double-sided heat dissipation structure.
  • the power module may have a single-sided heat dissipation structure including an upper half bridge substrate 321 and a lower half bridge substrate 322, and the upper half of the upper half of the bridge substrate 321 is provided with a top half.
  • the bridge IGBT chip 3231 and the upper half bridge diode chip 3233, the lower half bridge substrate 322 is provided with a lower half bridge IGBT chip 3232 and a lower half bridge diode chip 3234, the first power module electrode serves as a positive electrode, and the second power module electrode serves as The negative electrode, in addition to the output electrode 337.
  • the upper half bridge substrate 321 has a three-layer structure, the middle layer is an upper half bridge substrate insulating layer, and the upper and lower layers are upper half bridge substrate metal layers.
  • the lower half-bridge substrate 322 may have a two-layer structure, the upper layer is the lower half-bridge substrate metal layer, and the lower layer is the lower half-bridge substrate insulating layer 324.
  • the lower half-bridge substrate 322 may also have a three-layer structure, the middle layer is the lower half-bridge substrate insulating layer 324, and the upper and lower layers are the lower half-bridge substrate metal layers.
  • the power module is split into Figures 16(b) and 16(c).
  • 16(b) shows the operating current path after the upper half-bridge IGBT chip 3231 is turned on, and the operating current flows from the first power module electrode connecting portion 314, flows into the upper-half bridge substrate 321 through the bonding wire, and flows through The half-bridge IGBT chip 3231 then flows out to the output electrode 337 through the bonding line.
  • 16(c) shows the freewheeling current path after the upper half-bridge IGBT chip 3231 is turned off, and the freewheeling current flows from the second power module electrode connection portion 315, flows into the lower half-bridge substrate 322 through the bonding wire, and flows through The lower half bridge diode chip 3234 then flows out to the output electrode 337 through the bonding wire.
  • the operating current path after the lower half-bridge IGBT chip 3232 is turned on is: the operating current flows from the second power module electrode connection portion 315, flows into the lower half-bridge substrate 322 through the bonding wire, passes through the lower half-bridge IGBT chip 3232, and passes through The binding line flows out to the output electrode 337;
  • the freewheeling current path after the lower half bridge IGBT chip 3232 is turned off is: the freewheeling current flows from the first power module electrode connection portion 314, and flows into the upper half bridge substrate 321 through the binding line. After flowing through the upper half bridge diode chip 3233, it flows out to the output electrode 337 through the bonding wire.
  • the power module can adopt a double-sided heat dissipation structure, including a bottom substrate 331, an intermediate substrate 332, and a top substrate 333.
  • the copper layer on the upper surface of the bottom substrate 331 is a positive electrode copper layer 3311
  • the lower surface of the top substrate 333 has a bottom surface.
  • An upper half bridge chip 3381 is disposed on the positive electrode copper layer 3311
  • a first connection block 334 is disposed between the upper half bridge chip 3381 and the output electrode copper layer 3332
  • an intermediate substrate 332 is further disposed on the positive electrode copper layer 3311.
  • a lower half bridge chip 3382 is disposed on the 332, a second connection block 335 is disposed between the lower half bridge chip 3382 and the negative electrode copper layer 3331, and a connection post 336 is further disposed between the intermediate substrate 332 and the output electrode copper layer 3332.
  • the first power module electrode serves as a positive electrode
  • the second power module electrode serves as a negative electrode
  • the first power module electrode connection portion 316 is connected to the positive electrode copper layer 3311
  • the second power module electrode connection portion 317 is connected to the negative electrode copper layer 3331
  • the output electrode connection portion 3371 is connected to the output electrode copper layer 3332.
  • Figure 17 also shows a current path diagram during operation and freewheeling.
  • the operating current flows from the first power module electrode connection portion 316, flows into the upper half bridge chip 3381 through the positive electrode copper layer 3311, flows through the first connection block 334 to the output electrode copper layer 3332, and finally from the output electrode connection portion. 3371 outflow.
  • the freewheeling current flows from the second power module electrode connection portion 317, flows into the second connection block 335 through the negative electrode copper layer 3331, flows to the lower half bridge chip 3382, then flows to the intermediate substrate 332, and then passes through the connection.
  • the column 336 flows into the output electrode copper layer 3332 and finally flows out from the output electrode connection portion 3371.
  • the power module of the prior art is shown in Figure 8.
  • the two power module electrode connections are arranged side by side without any overlap between them.
  • the power module adopting the double-sided heat dissipation structure is compared with the power module of the prior art, and the simulation results are shown in Table 3.
  • the stray inductance of the prior art power module is 12.99nH
  • the stray inductance of the double-sided heat dissipation power module is only 3.27nH, that is, the embodiment 3 greatly reduces the stray inductance, which is also adopted.
  • Stray inductance is a critical parameter for the power module.
  • the size of the stray inductance directly affects the performance of the power module. In general, it is difficult to reduce the stray inductance of a few nH, like this embodiment. It is a very rare breakthrough to reduce the stray inductance of nearly 10nH! It is very important for the development of the power module industry!
  • Embodiment 4 discloses a power module having a cross-arranged electrode combination, as shown in FIG. 18, including a capacitor having a combination of capacitor electrodes and a power module having a combination of power module electrodes.
  • the capacitive electrode combination includes a first capacitive electrode and a second capacitive electrode that are aligned in parallel.
  • the first capacitor electrode and the second capacitor electrode are both plate-shaped and located in the middle of the capacitor side, and the first capacitor electrode and the second capacitor electrode are respectively connected to the positive and negative electrodes of the capacitor core group 411. As shown in FIGS.
  • the first capacitor electrode soldering portion 412 leads to a plurality of first capacitor electrode connecting portions 414, the first capacitor electrode connecting portion 414 is provided with a first connecting hole 4141, and the second capacitor electrode soldering portion 413 is led out.
  • the second capacitor electrode connecting portion 415 and the second capacitor electrode connecting portion 415 are provided with a second connecting hole 4151.
  • the first capacitor electrode connecting portion 414 is parallel to and intersects with the second capacitor electrode connecting portion 415.
  • the power module electrode combination includes a first power module electrode and a second power module electrode. As shown in FIG.
  • the first power module electrode soldering portion leads out a plurality of first power module electrode connecting portions 416, the first power module electrode connecting portion 416 is provided with a third connecting hole 4161, and the second power module electrode soldering portion is led out.
  • a plurality of second power module electrode connection portions 417 are provided, and a fourth connection hole 4171 is disposed on the second power module electrode connection portion 417.
  • the first power module electrode connection portion 416 is parallel and cross-aligned with the second power module electrode connection portion 417.
  • the first connecting hole 4141 is disposed coaxially with the third connecting hole 4161
  • the second connecting hole 4151 is coaxially disposed with the fourth connecting hole 4171.
  • the power module can adopt a single-sided heat dissipation structure or a double-sided heat dissipation structure.
  • the following describes the scheme of using a single-sided heat dissipation structure and a double-sided heat dissipation structure.
  • the power module may have a single-sided heat dissipation structure including an upper half bridge substrate 421 and a lower half bridge substrate 422, and the upper half of the upper half of the bridge substrate 421 is provided with a top half.
  • the bridge IGBT chip 4231 and the upper half bridge diode chip 4233, the lower half bridge substrate 422 is provided with a lower half bridge IGBT chip 4232 and a lower half bridge diode chip 4234, the first power module electrode serves as a positive electrode, and the second power module electrode serves as a negative The electrode, in addition to the output electrode 437.
  • the upper half-bridge substrate 421 has a three-layer structure, the middle layer is the upper half-bridge substrate insulating layer, and the upper and lower layers are the upper half-bridge substrate metal layers.
  • the lower half-bridge substrate 422 may have a two-layer structure, the upper layer is the lower half-bridge substrate metal layer, and the lower layer is the lower half-bridge substrate insulating layer 424.
  • the lower half-bridge substrate 422 may also have a three-layer structure, the middle layer being the lower half-bridge substrate insulating layer 424, and the upper and lower layers being the lower half-bridge substrate metal layer.
  • the power module is split into Figures 21(b) and 21(c).
  • 21(b) shows the operating current after the upper half-bridge IGBT chip 4231 is turned on. The path, the operating current flows from the first power module electrode connection portion 414, flows into the upper half bridge substrate 421 through the bonding wire, flows through the upper half bridge IGBT chip 4231, and then flows out to the output electrode 437 through the bonding wire.
  • 21(c) shows the freewheeling current path after the upper half-bridge IGBT chip 4231 is turned off, and the freewheeling current flows from the second power module electrode connection portion 415, flows into the lower half-bridge substrate 42 through the bonding wire, and flows through The lower half bridge diode chip 4234 then flows out to the output electrode 437 through the bonding wire.
  • the operating current path after the lower half-bridge IGBT chip 4232 is turned on is: the operating current flows from the second power module electrode connection portion 415, flows into the lower half-bridge substrate 422 through the bonding wire, passes through the lower half-bridge IGBT chip 4232, and passes through The binding line flows out to the output electrode 437;
  • the freewheeling current path after the lower half bridge IGBT chip 4232 is turned off is: the freewheeling current flows from the first power module electrode connecting portion 414, and flows into the upper half bridge substrate 421 through the bonding wire. After flowing through the upper half bridge diode chip 4233, it flows out to the output electrode 437 through the bonding wire.
  • the power module can adopt a double-sided heat dissipation structure, including a bottom substrate 431, an intermediate substrate 432, and a top substrate 433.
  • the copper layer on the upper surface of the bottom substrate 431 is a positive electrode copper layer 4311
  • the lower surface of the top substrate 433 has a bottom surface.
  • An upper half bridge chip 4381 is disposed on the positive electrode copper layer 4311
  • a first connection block 434 is disposed between the upper half bridge chip 4381 and the output electrode copper layer 4332
  • an intermediate substrate 432 is further disposed on the positive electrode copper layer 4311.
  • a lower half bridge chip 4382 is disposed on the 432, a second connection block 435 is disposed between the lower half bridge chip 4382 and the negative electrode copper layer 4331, and a connection post 436 is further disposed between the intermediate substrate 432 and the output electrode copper layer 4332.
  • the first power module electrode serves as a positive electrode
  • the second power module electrode serves as a negative electrode
  • the first power module electrode connection portion 416 is connected to the positive electrode copper layer 4311
  • the second power module electrode connection portion 417 is connected to the negative electrode copper layer 4331
  • the output electrode connection portion 4371 is connected to the output electrode copper layer 4332.
  • Figure 22 also shows a current path diagram during operation and freewheeling.
  • the operating current flows from the first power module electrode connection portion 416, flows into the upper half bridge chip 4381 through the positive electrode copper layer 4311, flows through the first connection block 434 to the output electrode copper layer 4332, and finally from the output electrode connection portion. 4371 outflow.
  • the freewheeling current flows from the second power module electrode connection portion 417, flows into the second connection block 435 through the negative electrode copper layer 4331, flows to the lower half bridge chip 4382, then flows to the intermediate substrate 432, and then passes through the connection.
  • the post 436 flows into the output electrode copper layer 4332 and finally flows out of the output electrode connecting portion 4371.
  • the power module of the prior art is shown in Figure 8.
  • the two power module electrode connections are arranged side by side without any overlap between them.
  • the power module adopting the double-sided heat dissipation structure is simulated and compared with the power module of the prior art, and the simulation results are shown in Table 4.
  • the stray inductance of the prior art power module is 12.99nH
  • the stray inductance of the double-sided heat dissipation power module is only 3.62nH, that is, the embodiment 4 greatly reduces the stray inductance, which is also adopted.
  • Stray inductance is a critical parameter for power modules, stray electricity
  • the size of the sense directly affects the performance of the power module. In general, it is very difficult to reduce the stray inductance of a few nH. It is a very rare breakthrough to reduce the stray inductance of nearly 10nH as in this embodiment! It is very important for the development of the power module industry!

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Abstract

一种平行电极组合，包括第一功率模块电极和第二功率模块电极，第一功率模块电极的焊接部(118)和第二功率模块电极的焊接部分别用于连接功率模块内部的电源铜层，第一功率模块电极的连接部(116)与第二功率模块电极的连接部(117)平行正对。该方案还公开了采用该平行电极组合的功率模块和功率模组。该方案中，第一功率模块电极的连接部与第二功率模块电极的连接部平行正对，这种结构相比现有技术能够大大降低杂散电感。

Description

一种平行电极组合、功率模块及功率模组 技术领域
本发明涉及一种平行电极组合、功率模块及功率模组。
背景技术
全球能源危机与气候变暖的威胁让人们在追求经济发展的同时越来越重视节能减排、低碳发展。随着绿色环保在国际上的确立与推进，功率半导体的发展、应用前景更加广阔。
现有电力电子功率模块和功率模组的杂散电感往往比较大，究其原因，其电极带来的杂散电感占了较大部分，这会造成过冲电压较大、损耗增加，而且也限制了在高开关频率场合的应用。
发明内容
发明目的：本发明的目的是提供一种能够大大降低杂散电感的平行电极组合、功率模块及功率模组。
技术方案：本发明所述的平行电极组合，包括第一功率模块电极和第二功率模块电极，第一功率模块电极的焊接部和第二功率模块电极的焊接部分别用于连接功率模块内部的电源铜层，第一功率模块电极的连接部与第二功率模块电极的连接部平行正对。
进一步，所述第一功率模块电极连接部和第二功率模块电极连接部上均设有连接孔。这样能够通过固定装置穿过连接孔来固定。
进一步，所述第一功率模块电极连接部与第二功率模块电极连接部长度不同。
进一步，所述第一功率模块电极连接部的连接孔中具有用于卡合螺帽或者螺栓头部的连接孔，或者第二功率模块电极连接部的连接孔中具有用于卡合螺帽或者螺栓头部的连接孔。这样可将螺帽或者螺栓头部嵌在连接孔内部，即使周围的绝缘材料软化，螺栓也不会松开。而如果螺帽或者螺栓头部扣在连接孔上方，一旦周围的绝缘材料软化，螺栓就容易松开。
采用本发明所述的平行电极组合的功率模块，包括上半桥基板和下半桥基板，上半桥基板上设有上半桥IGBT芯片和上半桥二极管芯片，下半桥基板上设有下半桥IGBT芯片和下半桥二极管芯片，第一功率模块电极和第二功率模块电极分别作为正负极，此外还包括输出电极；上半桥IGBT芯片开通后的工作电流路径为：工作电流从第一功率模块电极连接部流入，通过绑定线流入上半桥基板，流经上半桥IGBT芯片后通过绑定线流出至输出电极；上半桥IGBT芯片关断后的续流电流路径为：续流电流从第二功率模块电极连接部流入，通过绑定线流入下半桥基板，流经下半桥二极管芯片后通过绑定线流出至输出电极；下半桥IGBT芯片开通后的工作电流路径为：工作电流从第二功率模块电极连接部流入，通过绑定线流入下半桥基板，流经下半桥IGBT芯片后通过绑定线流出至输出电极；下半桥IGBT芯片关断后的续流电流路径为：续流电流从第一功率模块电极连接部流入，通过绑定线流入上半桥基板，流经上半桥二极管芯片后通过绑定线流出至 输出电极。这种单面散热的功率模块能够有效降低杂散电感。
采用本发明所述的平行电极组合的功率模块，包括底部基板和顶部基板，底部基板上设有上半桥芯片和中间基板，中间基板上设有下半桥芯片，第一功率模块电极和第二功率模块电极分别作为正负电极，此外还包括输出电极；工作时，工作电流从第一功率模块电极连接部流入底部基板，流经上半桥芯片后流至顶部基板，再通过输出电极连接部流出；续流时，续流电流从第二功率模块电极连接部流入，通过顶部基板流至下半桥芯片，接着流入中间基板，再流至顶部基板，通过输出电极连接部流出。这种双面散热的功率模块能够有效降低杂散电感，并且中间基板设在底部基板上更有利于降低杂散电感。
进一步，所述底部基板上表面设有正电极铜层，顶部基板下表面设有分离的负电极铜层和输出电极铜层，上半桥芯片与输出电极铜层之间设有第一连接块，下半桥芯片与负电极铜层之间设有第二连接块，中间基板与输出电极铜层之间还设有连接柱；工作时，工作电流从第一功率模块电极连接部流入，通过正电极铜层流入上半桥芯片，再通过第一连接块流至输出电极铜层，最后由输出电极连接部流出；续流时，续流电流从第二功率模块电极连接部流入，通过负电极铜层流入第二连接块，再流至下半桥芯片，接着流至中间基板，再通过连接柱流入输出电极铜层，最后由输出电极连接部流出。
采用本发明所述的平行电极组合的功率模组，包括具有电容电极组合的电容和具有功率模块电极组合的功率模块，电容电极组合包括平行正对的第一电容电极和第二电容电极，第一电容电极和第二电容电极分别连接电容芯组的正负极，功率模块电极组合为所述平行电极组合，第一功率模块电极连接部和第二功率模块电极连接部能够插入第一电容电极与第二电容电极之间的缝隙中。
进一步，所述第一电容电极部分凸起，第二电容电极也部分凸起，第一电容电极的凸起与第二电容电极的凸起共同形成容纳腔，且功率模块电极组合的连接部能够插入容纳腔中。
进一步，所述第一电容电极和第二电容电极均位于电容侧面中间。这样使得正负极电流路径长度相等，能够进一步降低杂散电感。
进一步，所述第一电容电极和第二电容电极均为板状。这样有效增大了第一电容电极与第二电容电极之间的正对面积，进一步降低了杂散电感。
采用本发明所述的平行电极组合的功率模组，包括具有电容电极组合的电容和具有功率模块电极组合的功率模块，电容电极组合包括第一电容电极和第二电容电极，第一电容电极的焊接部和第二电容电极的焊接部分别连接电容芯组的正负极，第一电容电极的焊接部引出第一电容电极的连接部，第二电容电极的焊接部引出第二电容电极的连接部，第一电容电极的连接部与第二电容电极的连接部平行正对，且第一电容电极连接部和第二电容电极连接部上均设有连接孔，功率模块电极组合为所述平行电极组合，功率模块电极组合的连接部与电容电极组合的连接部相适配。
进一步，所述第一电容电极的焊接部与第二电容电极的焊接部平行正对设置。 这样能够进一步减小杂散电感。
进一步，所述第一电容电极的焊接部与第二电容电极的焊接部均为板状。这样有效增大了第一电容电极焊接部与第二电容电极焊接部之间的正对面积，进一步降低了杂散电感。
进一步，所述第一电容电极的焊接部与第二电容电极的焊接部位于电容侧面中间。这样使得正负极电流路径长度相等，能够进一步降低杂散电感。
有益效果：本发明公开了一种平行电极组合，第一功率模块电极的连接部与第二功率模块电极的连接部平行正对，这种结构在现有技术中从未出现，相比现有技术能够大大降低杂散电感，这在本领域无疑是一个巨大的进步。本发明还公开了采用该平行电极组合的功率模块和功率模组，能够大大降低杂散电感。
附图说明
图1为本发明实施例1的功率模组的结构图；
图2为本发明实施例1的功率模组的局部放大图；
图3为本发明实施例1的电容电极连接部的结构图；
图4为本发明实施例1的功率模块的结构图；
图5为本发明实施例1的第一功率模块电极连接部的结构图；
图6为本发明实施例1的功率模块采用单面散热结构的示意图；
图6(a)为上下半桥割裂示意图；
图6(b)为上半桥电流路径图；
图6(c)为下半桥电流路径图；
图7为本发明实施例1的功率模块采用双面散热结构的示意图；
图8为现有技术的功率模块的结构图；
图9为本发明实施例2的功率模组的结构图；
图10为本发明实施例2的功率模组的局部放大图；
图11为本发明实施例2的功率模块采用单面散热结构的示意图；
图11(a)为上下半桥割裂示意图；
图11(b)为上半桥电流路径图；
图11(c)为下半桥电流路径图；
图12为本发明实施例2的功率模块采用双面散热结构的示意图；
图13为本发明实施例3的功率模组的结构图；
图14为本发明实施例3的功率模组的局部放大图；
图15为本发明实施例3的功率模组的分离图；
图16为本发明实施例3的功率模块采用单面散热结构的示意图；
图16(a)为上下半桥割裂示意图；
图16(b)为上半桥电流路径图；
图16(c)为下半桥电流路径图；
图17为本发明实施例3的功率模块采用双面散热结构的示意图；
图18为本发明实施例4的功率模组的结构图；
图19为本发明实施例4的功率模组的局部放大图；
图20为本发明实施例4的功率模组的分离图；
图21为本发明实施例4的功率模块采用单面散热结构的示意图；
图21(a)为上下半桥割裂示意图；
图21(b)为上半桥电流路径图；
图21(c)为下半桥电流路径图；
图22为本发明实施例4的功率模块采用双面散热结构的示意图。
具体实施方式
下面结合实施例和附图，对本发明的技术方案做进一步的介绍。
实施例1：
实施例1公开了一种具有平行安装电极组合的功率模组，如图1-5所示，包括具有电容电极组合的电容和具有功率模块电极组合的功率模块。电容电极组合包括第一电容电极和第二电容电极，第一电容电极的焊接部112连接电容芯组111的负极，第二电容电极的焊接部113连接电容芯组111的正极，第一电容电极焊接部112和第二电容电极焊接部113均为板状且位于电容侧面中间，第一电容电极的焊接部112引出第一电容电极的连接部114，第二电容电极的焊接部113引出第二电容电极的连接部115，第一电容电极的连接部114与第二电容电极的连接部115平行正对且第一电容电极的连接部114比第二电容电极的连接部115长，第一电容电极连接部114上设有两个第一接孔1141和两个第二连接孔1142，两个第一连接孔1141并排设于第一电容电极连接部114与第一电容电极焊接部112相连的一端，两个第二连接孔1142并排设于第一电容电极连接部114的另一端，第二电容电极连接部115上设有两个第三连接孔1151。功率模块电极组合包括第一功率模块电极和第二功率模块电极，第一功率模块电极的焊接部118和第二功率模块电极的焊接部分别连接功率模块内部的电源铜层，第一功率模块电极焊接部118引出第一功率模块电极连接部116，第二功率模块电极焊接部引出第二功率模块电极连接部117，第一功率模块电极的连接部116与第二功率模块电极的连接部117平行正对且第一功率模块电极的连接部116比第二功率模块电极的连接部117长，第一功率模块电极连接部116上设有两个第四接孔1161和两个第五连接孔1162，两个第四连接孔1161并排设于第一功率模块电极连接部116与第一功率模块电极焊接部118相连的一端，两个第五连接孔1162并排设于第一功率模块电极连接部116的另一端，第二功率模块电极连接部117上设有两个第六连接孔1171。其中，第一连接孔1141和第四连接孔1161比其他连接孔都大。
使用过程中，通常用螺栓和螺帽对电容和功率模块进行固定，固定的时候形成三层结构，如图2所示，第一电容电极连接部114、第一功率模块电极连接部116位于两端，第二电容电极连接部115和第二功率模块电极连接部117均位于中间。固定的时候可以有多种方式，其中两种方式是：1)将螺帽嵌入第一连接孔1141中，与该螺帽配套的螺栓的本体贯穿第五连接孔1162和第三连接孔1151， 从而与螺帽固定紧；将螺帽嵌入第四连接孔1161中，与该螺帽配套的螺栓的本体贯穿第二连接孔1142和第六连接孔1171，从而与螺帽固定紧。2)将螺栓头部嵌入第一连接孔1141中，螺栓的本体贯穿第五连接孔1162和第三连接孔1151，螺帽在第五连接孔1162处与螺栓固定紧；将螺栓头部嵌入第四连接孔1161中，螺栓的本体贯穿第二连接孔1142和第六连接孔1171，螺帽在第二连接孔1142处与螺栓固定紧。
功率模块内部可采用单面散热结构或者双面散热结构，下面分别介绍一下采用单面散热结构和双面散热结构的方案。
1、采用单面散热结构
如图6(a)、(b)和(c)所示，功率模块内部可采用单面散热结构，包括上半桥基板121和下半桥基板122，上半桥基板121上设有上半桥IGBT芯片1231和上半桥二极管芯片1233，下半桥基板122上设有下半桥IGBT芯片1232和下半桥二极管芯片1234，第一功率模块电极作为正电极，第二功率模块电极作为负电极，此外还有输出电极137。上半桥基板121是三层结构，中间层是上半桥基板绝缘层，上下两层是上半桥基板金属层。下半桥基板122可以是两层结构，上面一层是下半桥基板金属层，下面一层是下半桥基板绝缘层124。下半桥基板122还可以是三层结构，中间一层是下半桥基板绝缘层124，上下两层是下半桥基板金属层。为了更好地示出上下半桥的电流路径，将功率模块拆分成图6(b)和图6(c)。其中，图6(b)示出了上半桥IGBT芯片1231开通后的工作电流路径，工作电流从第一功率模块电极连接部116流入，通过绑定线流入上半桥基板121，流经上半桥IGBT芯片1231后通过绑定线流出至输出电极137。图6(c)示出了上半桥IGBT芯片1231关断后的续流电流路径，续流电流从第二功率模块电极连接部117流入，通过绑定线流入下半桥基板122，流经下半桥二极管芯片1234后通过绑定线流出至输出电极137。此外，下半桥IGBT芯片1232开通后的工作电流路径为：工作电流从第二功率模块电极连接部117流入，通过绑定线流入下半桥基板122，流经下半桥IGBT芯片1232后通过绑定线流出至输出电极137；下半桥IGBT芯片1232关断后的续流电流路径为：续流电流从第一功率模块电极连接部116流入，通过绑定线流入上半桥基板121，流经上半桥二极管芯片1233后通过绑定线流出至输出电极137。
2、采用双面散热结构
如图7所示，功率模块内部可采用双面散热结构，包括底部基板131、中间基板132和顶部基板133，底部基板131上表面的铜层为正电极铜层1311，顶部基板133下表面有两个分离的铜层，分别为负电极铜层1331和输出电极铜层1332。正电极铜层1311上设有上半桥芯片1381，上半桥芯片1381与输出电极铜层1332之间设有第一连接块134，正电极铜层1311上还设有中间基板132，中间基板132上设有下半桥芯片1382，下半桥芯片1382与负电极铜层1331之间设有第二连接块135，且中间基板132与输出电极铜层1332之间还设有连接柱136。第一功率模块电极作为正电极，第二功率模块电极作为负电极，此外还 有输出电极137。第一功率模块电极连接部116连接正电极铜层1311，第二功率模块电极连接部117连接负电极铜层1331，输出电极连接部1371连接输出电极铜层1332。图7还示出了工作时和续流时的电流路径图。工作时，工作电流从第一功率模块电极连接部116流入，通过正电极铜层1311流入上半桥芯片1381，再通过第一连接块134流至输出电极铜层1332，最后由输出电极连接部1371流出。续流时，续流电流从第二功率模块电极连接部117流入，通过负电极铜层1331流入第二连接块135，再流至下半桥芯片1382，接着流至中间基板132，然后通过连接柱136流入输出电极铜层1332，最后由输出电极连接部1371流出。
现有技术的功率模块如图8所示，两个功率模块电极连接部是并排设置的，之间没有任何的重叠。本实施例将采用双面散热结构的功率模块与现有技术的功率模块进行了仿真对比，仿真结果如表1所示。
表1实施例1采用双面散热结构的功率模块与现有技术的仿真对比
Figure PCTCN2017100105-appb-000001
由表1可知，现有技术功率模块的杂散电感为12.99nH，而双面散热功率模块的杂散电感仅为3.28nH，也即实施例1大大降低了杂散电感，这也是采用这种平行安装电极带来的好效果。杂散电感对功率模块而言是至关重要的参数，杂散电感的大小直接影响到功率模块的性能，一般而言，能够降低几nH的杂散电感已经很难得了，像本实施例这样能降低将近10nH杂散电感是非常难得的突破！对功率模块产业的发展有着非常重要的意义！
实施例2：
实施例2公开了一种具有平行平插电极组合的功率模组，如图9所示，包括具有电容电极组合的电容和具有功率模块电极组合的功率模块。电容电极组合包括平行正对的第一电容电极212和第二电容电极213，第一电容电极212和第二电容电极213均为板状且位于电容侧面中间，第一电容电极212和第二电容电极213分别连接电容芯组211的正负极，如图10所示，第一电容电极212部分凸起，第二电容电极213也部分凸起，第一电容电极212的凸起与第二电容电极213的凸起共同形成容纳腔。功率模块电极组合包括第一功率模块电极和第二功率模块电极，第一功率模块电极焊接部和第二功率模块电极焊接部分别连接功率模块内部的电源铜层，第一功率模块电极连接部214和第二功率模块电极连接部215平行正对，第一功率模块电极连接部214和第二功率模块电极连接部215能够插入容纳腔中。
功率模块内部可采用单面散热结构或者双面散热结构，下面分别介绍一下采用单面散热结构和双面散热结构的方案。
1、采用单面散热结构
如图11(a)、(b)和(c)所示，功率模块内部可采用单面散热结构，包括 上半桥基板221和下半桥基板222，上半桥基板221上设有上半桥IGBT芯片2231和上半桥二极管芯片2233，下半桥基板222上设有下半桥IGBT芯片2232和下半桥二极管芯片2234，第一功率模块电极作为正电极，第二功率模块电极作为负电极，此外还有输出电极237。上半桥基板221是三层结构，中间层是上半桥基板绝缘层，上下两层是上半桥基板金属层。下半桥基板222可以是两层结构，上面一层是下半桥基板金属层，下面一层是下半桥基板绝缘层224。下半桥基板222还可以是三层结构中间一层是下半桥基板绝缘层224，上下两层是下半桥基板金属层。为了更好地示出上下半桥的电流路径，将功率模块拆分成图11(b)和图11(c)。其中，图11(b)示出了上半桥IGBT芯片2231开通后的工作电流路径，工作电流从第一功率模块电极连接部214流入，通过绑定线流入上半桥基板221，流经上半桥IGBT芯片2231后通过绑定线流出至输出电极237。图11(c)示出了上半桥IGBT芯片2231关断后的续流电流路径，续流电流从第二功率模块电极连接部215流入，通过绑定线流入下半桥基板222，流经下半桥二极管芯片2234后通过绑定线流出至输出电极237。此外，下半桥IGBT芯片2232开通后的工作电流路径为：工作电流从第二功率模块电极连接部215流入，通过绑定线流入下半桥基板222，流经下半桥IGBT芯片2232后通过绑定线流出至输出电极237；下半桥IGBT芯片2232关断后的续流电流路径为：续流电流从第一功率模块电极连接部214流入，通过绑定线流入上半桥基板221，流经上半桥二极管芯片2233后通过绑定线流出至输出电极237。
2、采用双面散热结构
如图12所示，功率模块内部可采用双面散热结构，包括底部基板231、中间基板232和顶部基板233，底部基板231上表面的铜层为正电极铜层2311，顶部基板233下表面有两个分离的铜层，分别为负电极铜层2331和输出电极铜层2332。正电极铜层2311上设有上半桥芯片2381，上半桥芯片2381与输出电极铜层2332之间设有第一连接块234，正电极铜层2311上还设有中间基板232，中间基板232上设有下半桥芯片2382，下半桥芯片2382与负电极铜层2331之间设有第二连接块235，且中间基板232与输出电极铜层2332之间还设有连接柱236。第一功率模块电极作为正电极，第二功率模块电极作为负电极，此外还有输出电极237。第一功率模块电极连接部216连接正电极铜层2311，第二功率模块电极连接部217连接负电极铜层2331，输出电极连接部2371连接输出电极铜层2332。图12还示出了工作时和续流时的电流路径图。工作时，工作电流从第一功率模块电极连接部216流入，通过正电极铜层2311流入上半桥芯片2381，再通过第一连接块234流至输出电极铜层2332，最后由输出电极连接部2371流出。续流时，续流电流从第二功率模块电极连接部217流入，通过负电极铜层2331流入第二连接块235，再流至下半桥芯片2382，接着流至中间基板232，然后通过连接柱236流入输出电极铜层2332，最后由输出电极连接部2371流出。
现有技术的功率模块如图8所示，两个功率模块电极连接部是并排设置的，之间没有任何的重叠。本实施例将采用双面散热结构的功率模块与现有技术的功 率模块进行了仿真对比，仿真结果如表2所示。
表2实施例2采用双面散热结构的功率模块与现有技术的仿真对比
Figure PCTCN2017100105-appb-000002
由表2可知，现有技术功率模块的杂散电感为12.99nH，而双面散热功率模块的杂散电感仅为3.43nH，也即实施例2大大降低了杂散电感，这也是采用这种平行安装电极带来的好效果。杂散电感对功率模块而言是至关重要的参数，杂散电感的大小直接影响到功率模块的性能，一般而言，能够降低几nH的杂散电感已经很难得了，像本实施例这样能降低将近10nH杂散电感是非常难得的突破！对功率模块产业的发展有着非常重要的意义！
实施例3：
实施例3公开了一种具有平行同轴安装电极组合的功率模组，如图13所示，包括具有电容电极组合的电容和具有功率模块电极组合的功率模块。电容电极组合包括第一电容电极和第二电容电极。第一电容电极的焊接部312和第二电容电极的焊接部313分别连接电容芯组311的正负极，第一电容电极的焊接部312引出第一电容电极的连接部314，第二电容电极的焊接部313引出第二电容电极的连接部315。第一电容电极焊接部312和第二电容电极焊接部313均为板状且位于电容侧面中间。第一电容电极连接部314和第二电容电极连接部315平行正对，如图14所示，第一电容电极连接部314上设有第一连接孔3141和第二连接孔3142，第二电容电极连接部315上设有第三连接孔和第四连接孔。功率模块电极组合包括第一功率模块电极和第二功率模块电极。第一功率模块电极的焊接部和第二功率模块电极的焊接部分别连接功率模块内部的电源铜层，第一功率模块电极焊接部引出第一功率模块电极连接部316，第二功率模块电极焊接部引出第二功率模块电极连接部317，第一功率模块电极连接部316与第二功率模块电极连接部317平行正对，如图15所示，第一功率模块电极连接部316上设有第五连接孔3161和第六连接孔3162，第二功率模块电极连接部317上设有第七连接孔和第八连接孔。并且，第一连接孔3141、第五连接孔3161、第七连接孔和第三连接孔均同轴设置，第二连接孔3142、第六连接孔3162、第八连接孔和第四连接孔均同轴设置。
功率模块内部可采用单面散热结构或者双面散热结构，下面分别介绍一下采用单面散热结构和双面散热结构的方案。
1、采用单面散热结构
如图16(a)、(b)和(c)所示，功率模块内部可采用单面散热结构，包括上半桥基板321和下半桥基板322，上半桥基板321上设有上半桥IGBT芯片3231和上半桥二极管芯片3233，下半桥基板322上设有下半桥IGBT芯片3232和下半桥二极管芯片3234，第一功率模块电极作为正电极，第二功率模块电极作为 负电极，此外还有输出电极337。上半桥基板321是三层结构，中间层是上半桥基板绝缘层，上下两层是上半桥基板金属层。下半桥基板322可以是两层结构，上面一层是下半桥基板金属层，下面一层是下半桥基板绝缘层324。下半桥基板322还可以是三层结构，中间一层是下半桥基板绝缘层324，上下两层是下半桥基板金属层。为了更好地示出上下半桥的电流路径，将功率模块拆分成图16(b)和图16(c)。其中，图16(b)示出了上半桥IGBT芯片3231开通后的工作电流路径，工作电流从第一功率模块电极连接部314流入，通过绑定线流入上半桥基板321，流经上半桥IGBT芯片3231后通过绑定线流出至输出电极337。图16(c)示出了上半桥IGBT芯片3231关断后的续流电流路径，续流电流从第二功率模块电极连接部315流入，通过绑定线流入下半桥基板322，流经下半桥二极管芯片3234后通过绑定线流出至输出电极337。此外，下半桥IGBT芯片3232开通后的工作电流路径为：工作电流从第二功率模块电极连接部315流入，通过绑定线流入下半桥基板322，流经下半桥IGBT芯片3232后通过绑定线流出至输出电极337；下半桥IGBT芯片3232关断后的续流电流路径为：续流电流从第一功率模块电极连接部314流入，通过绑定线流入上半桥基板321，流经上半桥二极管芯片3233后通过绑定线流出至输出电极337。
2、采用双面散热结构
如图17所示，功率模块内部可采用双面散热结构，包括底部基板331、中间基板332和顶部基板333，底部基板331上表面的铜层为正电极铜层3311，顶部基板333下表面有两个分离的铜层，分别为负电极铜层3331和输出电极铜层3332。正电极铜层3311上设有上半桥芯片3381，上半桥芯片3381与输出电极铜层3332之间设有第一连接块334，正电极铜层3311上还设有中间基板332，中间基板332上设有下半桥芯片3382，下半桥芯片3382与负电极铜层3331之间设有第二连接块335，且中间基板332与输出电极铜层3332之间还设有连接柱336。第一功率模块电极作为正电极，第二功率模块电极作为负电极，此外还有输出电极337。第一功率模块电极连接部316连接正电极铜层3311，第二功率模块电极连接部317连接负电极铜层3331，输出电极连接部3371连接输出电极铜层3332。图17还示出了工作时和续流时的电流路径图。工作时，工作电流从第一功率模块电极连接部316流入，通过正电极铜层3311流入上半桥芯片3381，再通过第一连接块334流至输出电极铜层3332，最后由输出电极连接部3371流出。续流时，续流电流从第二功率模块电极连接部317流入，通过负电极铜层3331流入第二连接块335，再流至下半桥芯片3382，接着流至中间基板332，然后通过连接柱336流入输出电极铜层3332，最后由输出电极连接部3371流出。
现有技术的功率模块如图8所示，两个功率模块电极连接部是并排设置的，之间没有任何的重叠。本实施例将采用双面散热结构的功率模块与现有技术的功率模块进行了仿真对比，仿真结果如表3所示。
表3实施例3采用双面散热结构的功率模块与现有技术的仿真对比
Figure PCTCN2017100105-appb-000003
Figure PCTCN2017100105-appb-000004
由表3可知，现有技术功率模块的杂散电感为12.99nH，而双面散热功率模块的杂散电感仅为3.27nH，也即实施例3大大降低了杂散电感，这也是采用这种平行安装电极带来的好效果。杂散电感对功率模块而言是至关重要的参数，杂散电感的大小直接影响到功率模块的性能，一般而言，能够降低几nH的杂散电感已经很难得了，像本实施例这样能降低将近10nH杂散电感是非常难得的突破！对功率模块产业的发展有着非常重要的意义！
实施例4：
实施例4公开了一种具有交叉排列电极组合的功率模组，如图18所示，包括具有电容电极组合的电容和具有功率模块电极组合的功率模块。电容电极组合包括平行正对的第一电容电极和第二电容电极。第一电容电极和第二电容电极均为板状且位于电容侧面中间，第一电容电极和第二电容电极分别连接电容芯组411的正负极。如图18和19所示，第一电容电极焊接部412引出多个第一电容电极连接部414，第一电容电极连接部414上设有第一连接孔4141，第二电容电极焊接部413引出多个第二电容电极连接部415，第二电容电极连接部415上设有第二连接孔4151，第一电容电极连接部414与第二电容电极连接部415平行且交叉排列。功率模块电极组合包括第一功率模块电极和第二功率模块电极。如图20所示，第一功率模块电极焊接部引出多个第一功率模块电极连接部416，第一功率模块电极连接部416上设有第三连接孔4161，第二功率模块电极焊接部引出多个第二功率模块电极连接部417，第二功率模块电极连接部417上设有第四连接孔4171，第一功率模块电极连接部416与第二功率模块电极连接部417平行且交叉排列。并且，第一连接孔4141与第三连接孔4161同轴设置，第二连接孔4151与第四连接孔4171同轴设置。
功率模块内部可采用单面散热结构或者双面散热结构，下面分别介绍一下采用单面散热结构和双面散热结构的方案。
1、采用单面散热结构
如图21(a)、(b)和(c)所示，功率模块内部可采用单面散热结构，包括上半桥基板421和下半桥基板422，上半桥基板421上设有上半桥IGBT芯片4231和上半桥二极管芯片4233，下半桥基板422上设有下半桥IGBT芯片4232和下半桥二极管芯片4234，第一功率模块电极作为正电极，第二功率模块电极作为负电极，此外还有输出电极437。上半桥基板421是三层结构，中间层是上半桥基板绝缘层，上下两层是上半桥基板金属层。下半桥基板422可以是两层结构，上面一层是下半桥基板金属层，下面一层是下半桥基板绝缘层424。下半桥基板422还可以是三层结构，中间一层是下半桥基板绝缘层424，上下两层是下半桥基板金属层。为了更好地示出上下半桥的电流路径，将功率模块拆分成图21(b)和图21(c)。其中，图21(b)示出了上半桥IGBT芯片4231开通后的工作电流 路径，工作电流从第一功率模块电极连接部414流入，通过绑定线流入上半桥基板421，流经上半桥IGBT芯片4231后通过绑定线流出至输出电极437。图21(c)示出了上半桥IGBT芯片4231关断后的续流电流路径，续流电流从第二功率模块电极连接部415流入，通过绑定线流入下半桥基板42，流经下半桥二极管芯片4234后通过绑定线流出至输出电极437。此外，下半桥IGBT芯片4232开通后的工作电流路径为：工作电流从第二功率模块电极连接部415流入，通过绑定线流入下半桥基板422，流经下半桥IGBT芯片4232后通过绑定线流出至输出电极437；下半桥IGBT芯片4232关断后的续流电流路径为：续流电流从第一功率模块电极连接部414流入，通过绑定线流入上半桥基板421，流经上半桥二极管芯片4233后通过绑定线流出至输出电极437。
2、采用双面散热结构
如图22所示，功率模块内部可采用双面散热结构，包括底部基板431、中间基板432和顶部基板433，底部基板431上表面的铜层为正电极铜层4311，顶部基板433下表面有两个分离的铜层，分别为负电极铜层4331和输出电极铜层4332。正电极铜层4311上设有上半桥芯片4381，上半桥芯片4381与输出电极铜层4332之间设有第一连接块434，正电极铜层4311上还设有中间基板432，中间基板432上设有下半桥芯片4382，下半桥芯片4382与负电极铜层4331之间设有第二连接块435，且中间基板432与输出电极铜层4332之间还设有连接柱436。第一功率模块电极作为正电极，第二功率模块电极作为负电极，此外还有输出电极437。第一功率模块电极连接部416连接正电极铜层4311，第二功率模块电极连接部417连接负电极铜层4331，输出电极连接部4371连接输出电极铜层4332。图22还示出了工作时和续流时的电流路径图。工作时，工作电流从第一功率模块电极连接部416流入，通过正电极铜层4311流入上半桥芯片4381，再通过第一连接块434流至输出电极铜层4332，最后由输出电极连接部4371流出。续流时，续流电流从第二功率模块电极连接部417流入，通过负电极铜层4331流入第二连接块435，再流至下半桥芯片4382，接着流至中间基板432，然后通过连接柱436流入输出电极铜层4332，最后由输出电极连接部4371流出。
现有技术的功率模块如图8所示，两个功率模块电极连接部是并排设置的，之间没有任何的重叠。本实施例将采用双面散热结构的功率模块与现有技术的功率模块进行了仿真对比，仿真结果如表4所示。
表4实施例4采用双面散热结构的功率模块与现有技术的仿真对比
Figure PCTCN2017100105-appb-000005
由表4可知，现有技术功率模块的杂散电感为12.99nH，而双面散热功率模块的杂散电感仅为3.62nH，也即实施例4大大降低了杂散电感，这也是采用这种平行安装电极带来的好效果。杂散电感对功率模块而言是至关重要的参数，杂散电 感的大小直接影响到功率模块的性能，一般而言，能够降低几nH的杂散电感已经很难得了，像本实施例这样能降低将近10nH杂散电感是非常难得的突破！对功率模块产业的发展有着非常重要的意义！

Claims (15)

  1. 一种平行电极组合，其特征在于：包括第一功率模块电极和第二功率模块电极，第一功率模块电极的焊接部和第二功率模块电极的焊接部分别用于连接功率模块内部的电源铜层，第一功率模块电极的连接部与第二功率模块电极的连接部平行正对。
  2. 根据权利要求1所述的平行电极组合，其特征在于：所述第一功率模块电极连接部和第二功率模块电极连接部上均设有连接孔。
  3. 根据权利要求1所述的平行电极组合，其特征在于：所述第一功率模块电极连接部与第二功率模块电极连接部长度不同。
  4. 根据权利要求2所述的平行电极组合，其特征在于：所述第一功率模块电极连接部的连接孔中具有用于卡合螺帽或者螺栓头部的连接孔，或者第二功率模块电极连接部的连接孔中具有用于卡合螺帽或者螺栓头部的连接孔。
  5. 采用根据权利要求1所述的平行电极组合的功率模块，其特征在于：包括上半桥基板和下半桥基板，上半桥基板上设有上半桥IGBT芯片和上半桥二极管芯片，下半桥基板上设有下半桥IGBT芯片和下半桥二极管芯片，第一功率模块电极和第二功率模块电极分别作为正负极，此外还包括输出电极；上半桥IGBT芯片开通后的工作电流路径为：工作电流从第一功率模块电极连接部流入，通过绑定线流入上半桥基板，流经上半桥IGBT芯片后通过绑定线流出至输出电极；上半桥IGBT芯片关断后的续流电流路径为：续流电流从第二功率模块电极连接部流入，通过绑定线流入下半桥基板，流经下半桥二极管芯片后通过绑定线流出至输出电极；下半桥IGBT芯片开通后的工作电流路径为：工作电流从第二功率模块电极连接部流入，通过绑定线流入下半桥基板，流经下半桥IGBT芯片后通过绑定线流出至输出电极；下半桥IGBT芯片关断后的续流电流路径为：续流电流从第一功率模块电极连接部流入，通过绑定线流入上半桥基板，流经上半桥二极管芯片后通过绑定线流出至输出电极。
  6. 采用根据权利要求1所述的平行电极组合的功率模块，其特征在于：包括底部基板和顶部基板，底部基板上设有上半桥芯片和中间基板，中间基板上设有下半桥芯片，第一功率模块电极和第二功率模块电极分别作为正负电极，此外还包括输出电极；工作时，工作电流从第一功率模块电极连接部流入底部基板，流经上半桥芯片后流至顶部基板，再通过输出电极连接部流出；续流时，续流电流从第二功率模块电极连接部流入，通过顶部基板流至下半桥芯片，接着流入中间基板，再流至顶部基板，通过输出电极连接部流出。
  7. 根据权利要求6所述的功率模块，其特征在于：所述底部基板上表面设有正电极铜层，顶部基板下表面设有分离的负电极铜层和输出电极铜层，上半桥芯片与输出电极铜层之间设有第一连接块，下半桥芯片与负电极铜层之间设有第二连接块，中间基板与输出电极铜层之间还设有连接柱；工作时，工作电流从第一功率模块电极连接部流入，通过正电极铜层流入上半桥芯片，再通过第一连接块流至输出电极铜层，最后由输出电极连接部流出；续流时，续流电流从第二功率模块电极连接部流入，通过负电极铜层流入第二连接块，再流至下半桥芯片， 接着流至中间基板，再通过连接柱流入输出电极铜层，最后由输出电极连接部流出。
  8. 采用根据权利要求1所述的平行电极组合的功率模组，其特征在于：包括具有电容电极组合的电容和具有功率模块电极组合的功率模块，电容电极组合包括平行正对的第一电容电极和第二电容电极，第一电容电极和第二电容电极分别连接电容芯组的正负极，功率模块电极组合为所述平行电极组合，第一功率模块电极连接部和第二功率模块电极连接部能够插入第一电容电极与第二电容电极之间的缝隙中。
  9. 根据权利要求8所述的功率模组，其特征在于：所述第一电容电极部分凸起，第二电容电极也部分凸起，第一电容电极的凸起与第二电容电极的凸起共同形成容纳腔，且功率模块电极组合的连接部能够插入容纳腔中。
  10. 根据权利要求8所述的功率模组，其特征在于：所述第一电容电极和第二电容电极均位于电容侧面中间。
  11. 根据权利要求8所述的功率模组，其特征在于：所述第一电容电极和第二电容电极均为板状。
  12. 采用根据权利要求2所述的平行电极组合的功率模组，其特征在于：包括具有电容电极组合的电容和具有功率模块电极组合的功率模块，电容电极组合包括第一电容电极和第二电容电极，第一电容电极的焊接部和第二电容电极的焊接部分别连接电容芯组的正负极，第一电容电极的焊接部引出第一电容电极的连接部，第二电容电极的焊接部引出第二电容电极的连接部，第一电容电极的连接部与第二电容电极的连接部平行正对，且第一电容电极连接部和第二电容电极连接部上均设有连接孔，功率模块电极组合为所述平行电极组合，功率模块电极组合的连接部与电容电极组合的连接部相适配。
  13. 根据权利要求12所述的功率模组，其特征在于：所述第一电容电极的焊接部与第二电容电极的焊接部平行正对设置。
  14. 根据权利要求12所述的功率模组，其特征在于：所述第一电容电极的焊接部与第二电容电极的焊接部均为板状。
  15. 根据权利要求12所述的功率模组，其特征在于：所述第一电容电极的焊接部与第二电容电极的焊接部位于电容侧面中间。
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