TWI863207B - Dual-inverter assembly - Google Patents

Abstract

The present invention provides a dual-inverter assembly including an elongated base, a first power module, a second power module, an input copper bar and two output copper bars. The elongated base includes a first elongated sidewall and a second elongated sidewall opposite to each other and extended along a first direction. The first power module and the second power module are disposed on a first side and a second side of the elongated base along the first direction, respectively. The input copper bar served as a DC input copper bar is spatially corresponding to the first elongated sidewall, and electrically connected to the first power module and the second power module. The two output copper bars served as two AC output copper bars are spatially corresponding to the second elongated sidewall, and electrically connected to the first power module and the second power module, respectively, so as to achieve an optimized configuration.

Description

Dual inverter assembly structure

This case is about an electronic assembly structure, especially a dual-inverter assembly structure, which integrates narrow power modules in a limited space in a single-input dual-output manner and improves the overall space utilization.

The traction inverter of the automotive motor usually includes three high-power modules arranged to form a narrow and long structure. Since the high-efficiency power modules used in the inverter are often accompanied by high heat generation, a water-cooled heat dissipation assembly structure must be combined to achieve effective heat dissipation. However, the water-cooled heat dissipation assembly structure mostly adopts a single-sided cooling channel design, one side is thermally coupled to the three high-power modules, and the other side provides the water outlet and water inlet of the cooling channel. Therefore, the assembly structure of the inverter is not easy to optimize the space utilization and improve the overall space utilization.

On the other hand, for the stacked dual inverter assembly structure, the single-sided cooling channel design of the traditional heat dissipation assembly structure has occupied a lot of space, which is not conducive to the overall space configuration of the stacked inverter. The input and output of each set of inverters must avoid the water outlet and water inlet of the cooling channel. Furthermore, in addition to the need to connect the two sets of output ends of the dual inverter to the power module separately, the connection with the load end must also comply with the connection direction restrictions. How to optimize the stacked dual inverter assembly structure and improve space utilization at the same time has always been a major concern in this field.

In view of this, it is necessary to provide a dual-inverter assembly structure to integrate narrow power modules in a limited space in a single-input dual-output manner and improve the overall space utilization to solve the deficiencies of the prior art.

The purpose of this case is to provide a dual-inverter assembly structure that integrates narrow power modules in a limited space in a single-input dual-output manner and improves the overall space utilization.

Another purpose of the present invention is to provide a dual inverter assembly structure. Two power modules are stacked up and down on a narrow base, a set of DC input copper bars are integrated from the bottom to one side and then electrically connected to the two power modules, and two sets of AC output copper bars are electrically connected to the two power modules from the other side and then led to the top for integration, which can effectively integrate the use of the upper and lower spaces of the stacking structure. If the capacitor module (Bulk Cap) required for the dual inverter assembly structure is stacked on top of the assembly structure, the distance between the capacitor module and the two power modules can be minimized and kept as consistent as possible with the distance between the power devices of each power module. The cooling channel of the internal structure of the narrow base can enter and exit from the space below, serving as a cooling structure for the two power modules and the capacitor module. The two sets of AC output copper bars are restricted by the connection direction of the load end, and elastic components can be set up separately to provide appropriate elastic force to maintain the output copper bar and the load in stable contact. The control board required for the dual-inverter assembly structure is set below the assembly structure to make full use of the space below. In this way, the dual-inverter assembly structure can achieve the optimal configuration of narrow and long power modules in a limited space in a single-input dual-output manner and improve the overall space utilization.

To achieve the above-mentioned purpose, the present invention provides a dual inverter assembly structure, including a narrow elongated base, a first power module, a second power module, an input copper bar and two output copper bars. The narrow elongated base includes a first surface, a second surface, a first long side wall and a second long side wall, wherein the first surface and the second surface are arranged opposite to each other, and the first long side wall and the second long side wall are arranged opposite to each other and extend along a first direction. The first power module is arranged on the first surface along the first direction. The second power module is arranged on the second surface along the first direction. The input copper bar is spatially opposite to the first long side wall, partially extends from the first long side wall to the first surface and the second surface, and includes a first connecting portion arranged on the first long side wall, electrically connected to the first power module and the second power module. The input copper bar is a DC input copper bar, including a positive input copper bar and a negative input copper bar, which are spatially opposite to the first long side wall. The two output copper bars are spatially opposite to the second long side wall, and partly extend from the first long side wall to the first surface and the second surface, wherein the two output copper bars are two AC output copper bars, and each of the two output copper bars includes a second connection portion, which is adjacently arranged on the second long side wall, and the second connection portion of one of the two output copper bars is electrically connected to the first power module, and the second connection portion of the other of the two output copper bars is electrically connected to the second power module.

In one embodiment, the input copper bar includes a positive input copper bar and a negative input copper bar, which are spatially opposite to the first long side wall.

In one embodiment, the positive electrode input copper bar includes a positive electrode bonding section, and the negative electrode input copper bar includes a negative electrode bonding section, which are spatially parallel to the first long side wall.

In one embodiment, the positive electrode input copper bar includes a positive electrode input terminal connected to the positive electrode bonding section, and the negative electrode input copper bar includes a negative electrode input terminal connected to the negative electrode bonding section, and the positive electrode input terminal and the negative electrode input terminal are arranged parallel to each other.

In one embodiment, the positive input copper bar includes a plurality of positive input connection terminals, which are spatially opposite to the first surface and the second surface, connected in parallel through the positive bonding section, and electrically connected to the first power module and the second power module.

In one embodiment, the negative electrode input copper bar includes a plurality of negative electrode input connection terminals, which are spatially opposite to the first surface and the second surface, connected in parallel through the negative electrode bonding section, and electrically connected to the first power module and the second power module.

In one embodiment, a plurality of positive input connection terminals and a plurality of negative input connection terminals are arranged alternately with each other in the direction from the first surface toward the second surface.

In one embodiment, the input copper bar includes an insulating isolation layer disposed between the positive input copper bar and the negative input copper bar.

In one embodiment, the input copper bar includes an insulating protective layer, and the positive input copper bar, the insulating isolation layer and the negative input copper bar are arranged between the first long side wall and the insulating protective layer.

In one embodiment, the two output copper bars include a first output copper bar and a second output copper bar. The first output copper bar and the second output copper bar each include an output terminal, and are assembled to abut against a load along the direction from the first surface toward the second surface to form an electrical connection.

In one embodiment, the first power module includes a plurality of first power devices, which are arranged on the first surface and output through the first output copper bar, and the second power module includes a plurality of second power devices, which are arranged on the second surface and output through the second output copper bar, wherein the first output copper bar and the second output copper bar are output in a confluence manner.

In one embodiment, the first power module includes a plurality of first power devices, which are arranged on the first surface and output through the first output copper bar, and the second power module includes a plurality of second power devices, which are arranged on the second surface and output through the second output copper bar, wherein the first output copper bar and the second output copper bar are output in a split current manner.

In one embodiment, when the dual inverter assembly structure is docked with the load, the output terminal provides an elastic force through an elastic component to push the output terminal along the direction from the first surface to the second surface, and maintain the output terminal in contact with the load.

In one embodiment, the second connection portion of the first output copper bar is electrically connected to the first power module, and the second connection portion of the second output copper bar is electrically connected to the second power module.

In one embodiment, the first power module includes a plurality of first power devices arranged at equal intervals along a first direction, wherein the second power module includes a plurality of second power devices arranged at equal intervals along the first direction.

In one embodiment, each of the plurality of first power devices and the plurality of second power devices includes a positive contact terminal, a negative contact terminal and an output contact terminal. The positive contact terminal and the negative contact terminal are spatially opposite to the first long side wall and are electrically connected to the input copper bar. The output contact terminal is spatially opposite to the second long side wall. The output contact terminals of the plurality of first power devices are electrically connected to the first output copper bar, and the output contact terminals of the plurality of second power devices are electrically connected to the second output copper bar.

In one embodiment, the elongated base includes a cooling water channel, a cooling water channel inlet, and a cooling water channel outlet. The cooling water channel is disposed in the elongated base and is thermally coupled to the first power module and the second power module. The cooling water channel inlet and the cooling water channel outlet are disposed on the first surface and are connected to the cooling water channel.

In one embodiment, the dual inverter assembly structure further includes a control board, which is stacked on the first side of the elongated base, and the positive input end of the positive input copper bar and the negative input end of the negative input copper bar extend along a surface of the control board.

In one embodiment, the dual inverter assembly structure further includes a capacitor module, which is stacked on the second surface of the elongated base and located between the output terminals of the two output copper bars and the second surface of the elongated base.

In one embodiment, the two output copper bars include a first output copper bar and a second output copper bar, the output terminals in the first output copper bar and a corresponding elastic component are arranged at a bottom projection position beyond the first power module, the second power module and the capacitor module in the first direction; the output terminals in the first output copper bar and the output terminals in the second output copper bar are arranged on a plane parallel to the second surface on the narrow elongated base, wherein the dual inverter assembly structure further includes a control board arranged below the elastic component and extending obliquely to below the first power module, and the input copper bar extends along the space above the control board and below the first power module.

1. 1a: Dual inverter assembly structure

10: Narrow base

11: First page

12: Second side

13a: First long side wall

13b: Second long sidewall

14a: First short sidewall

14b: Second short sidewall

15: Cooling water channel entrance

16: Cooling water channel outlet

21: First power module

21a, 21b, 21c: First power device

211: Positive contact terminal

212: Negative contact terminal

213: Output contact terminal

22: Second power module

221: Positive contact terminal

222: Negative contact terminal

223: Output contact terminal

22a, 22b, 22c: Second power device

30: Input copper bar

301: First connection part

302: Fixed frame

31: Positive input copper bar

310: Positive input terminal

311, 312: Positive input connection terminal

313: Positive electrode bonding section

32: Negative input copper bar

320: Negative input terminal

321, 322: Negative input connection terminal

323: Negative bonding section

33: Insulation isolation layer

34: Insulation protective layer

40a: First output copper bar

41a: Second connection part

42a: Output terminal

40b: Second output copper bar

41b: Second connection part

42b: Output terminal

50a, 50b: Elastic components

60: Control panel

61: Surface

70: Capacitor module

9: Load

90a, 90b: Contact terminals

X, Y, Z: axis

Figure 1 is a structural diagram showing the appearance of the dual inverter assembly structure of this case.

Figures 2A and 2B are schematic diagrams showing the structure of the dual inverter assembly structure of the present invention, in which the first power module and the second power module are arranged on a narrow and long base.

Figure 3 is a schematic diagram showing the structure of the dual inverter assembly structure in which the input copper bar corresponds to the first power module and the second power module is arranged on a narrow and long base.

Figure 4 is a structural exploded view of the input copper bar in the dual inverter assembly structure of this case.

Figure 5 is a schematic diagram showing the structure of the dual inverter assembly structure in which two output copper bars corresponding to the first power module and the second power module are arranged on a narrow and long base.

Figure 6 is a structural exploded view of the first output copper bar in the dual inverter assembly structure of this case.

Figure 7 is a structural exploded view of the second output copper bar in the dual inverter assembly structure of this case.

Figure 8 is a schematic diagram showing the current conduction direction of the input copper bar in the dual inverter assembly structure of this case.

Figure 9 is a schematic diagram showing the current conduction direction of the two output copper bars in the dual inverter assembly structure of this case.

Figure 10 is a structural exploded view of another embodiment of the dual inverter assembly structure of the present invention.

Figure 11 is a structural diagram showing the appearance of the dual inverter assembly structure of the present invention in the embodiment of Figure 10.

Figure 12 is a planar side view of the dual inverter assembly structure of the present invention in Figure 11.

Some typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different aspects, all of which do not deviate from the scope of the present invention, and the descriptions and drawings therein are essentially used for illustrative purposes rather than for limiting the present invention. For example, if the following content of the present disclosure describes that a first feature is disposed on or above a second feature, it means that it includes an embodiment in which the first feature and the second feature are directly in contact, and also includes an embodiment in which the additional feature can be disposed between the first feature and the second feature, so that the first feature and the second feature may not be in direct contact. In addition, different embodiments in the present disclosure may use repeated reference symbols and/or marks. These repetitions are for the purpose of simplification and clarity and are not intended to limit the relationship between the various embodiments and/or the described appearance structures. Furthermore, in order to facilitate the description of the relationship between a component or feature and another (plural) component or (plural) feature in the drawings, spatially related terms such as "front", "back", "upper", "lower" and similar terms may be used. In addition to the orientations shown in the drawings, spatially related terms are used to cover different orientations of the device in use or operation. The device may also be positioned otherwise (e.g., rotated 90 degrees or located in other orientations), and the description of the spatially related terms used may be interpreted accordingly. In addition, when a component is referred to as being "connected to" or "coupled to" another component, it may be directly connected to or coupled to the other component, or there may be intervening components. Although the numerical ranges and parameters of the broad scope of the present disclosure are approximate values, the numerical values are stated as accurately as possible in the specific examples. In addition, it is understood that although the terms "first", "second", "third", etc. can be used in the scope of the patent application to describe different components, these components should not be limited by these terms. In the embodiments, these components described accordingly are represented by different component symbols. These terms are used to distinguish different components. For example: the first component can be called the second component, and similarly, the second component can also be called the first component without departing from the scope of the embodiments.

Refer to FIG. 1. In this embodiment, the present invention provides a dual inverter assembly structure 1 including a narrow elongated base 10, a first power module 21, a second power module 22, an input copper bar 30, and two output copper bars 40a, 40b. The first power module 21 and the second power module 22 are stacked up and down on the narrow elongated base 10, for example, in the Z-axis direction. The input copper bar 30 is, for example, a single set of DC input copper bars, which are integrated from the bottom of the narrow elongated base 10 to one side (the first long side wall 13a) and then electrically connected to the first power module 21 and the second power module 22. In addition, the two output copper bars 40a, 40b are, for example, double sets of AC output copper bars, which are composed of a set of first output copper bars 40a and another set of second output copper bars 40b. The first power module 21 is electrically connected to the first output copper bar 40a, and the second power module 22 is electrically connected to the second output copper bar 40b. The two sets of AC output copper bars are led from the other side (the second long side wall 13b) to the top of the narrow and long base 10 for integration. When the dual inverter assembly structure 1 is docked to a load 9 along the Z axis direction, for example, the first output copper bar 40a and the second output copper bar 40b are electrically connected to the contact terminals 90a and 90b of the load 9, respectively, so that power can be supplied to the load 9. In other words, the dual inverter assembly structure 1 of the present invention can integrate narrow and long power modules in a limited space in a single-input dual-output manner, and achieve the performance of improving the overall space utilization rate. The detailed features will be further explained later.

Refer to FIG. 1 and FIG. 2A and FIG. 2B. In this embodiment, the elongated base 10 includes a first surface 11, a second surface 12, a first long side wall 13a, a second long side wall 13b, a first short side wall 14a and a second short side wall 14b. The first surface 11 and the second surface 12 are arranged opposite to each other, the first long side wall 13a and the second long side wall 13b are arranged opposite to each other and extend along a first direction such as the X axis, and the first surface 11 and the second surface 12 are connected through the first long side wall 13a and the second long side wall 13b. In addition, the first short side wall 14a and the second short side wall 14b are arranged opposite to each other and extend along a second direction such as the Y axis, and are respectively connected to the first long side wall 13a and the second long side wall 13b. In this embodiment, the elongated base 10 includes a cooling water channel (not shown), a cooling water channel inlet 15 and a cooling water channel outlet 16. The cooling water channel is disposed in the elongated base 10 and is thermally coupled to the first power module 21 and the second power module 22. The cooling water channel inlet 15 and the cooling water channel outlet 16 are disposed on the first surface 11 and are connected to the cooling water channel and are conducted out through the second long side wall 13b. Thus, the heat generated by the first power module 21 and the second power module 22 can be dissipated by the liquid coolant in the cooling water channel. In other embodiments, the cooling water channel inlet 15 and the cooling water channel outlet 16 can be conducted out through the first short side wall 14a, the second short side wall 14b or the first long side wall 13a. Of course, this case is not limited to this.

In the embodiment, the first power module 21 includes, for example, three first power devices 21a, 21b, and 21c, which are arranged at equal intervals along the first direction (X-axis direction) on the first surface 11 of the elongated base 10. The second power module 22 includes, for example, three second power devices 22a, 22b, and 22c, which are arranged at equal intervals along the first direction (X-axis direction) on the second surface 12 of the elongated base 10. The three first power devices 21a, 21b, and 21c of the first power module 21 can form a set of three-phase AC outputs through the first output copper bar 40a. The three second power devices 22a, 22b, and 22c of the second power module 22 can form another set of three-phase AC outputs through the second output copper bar 40b. Of course, in other embodiments, the number and spacing distance of the first power module 21 including the first power devices 21a, 21b, 21c and the second power module 22 including the second power devices 22a, 22b, 22c can be adjusted according to actual needs, and this case is not limited to this.

It is worth noting that each of the plurality of first power devices 21a, 21b, 21c includes a positive contact terminal 211, a negative contact terminal 212, and an output contact terminal 213. Each of the plurality of second power devices 22a, 22b, 22c includes a positive contact terminal 221, a negative contact terminal 222, and an output contact terminal 223. The positive contact terminals 211, 221 and the negative contact terminals 212, 222 are spatially opposite to the first long side wall 13a, and are electrically connected to the input copper bar 30. The output contact terminals 213 and 223 are spatially relative to the second long side wall 13b, and the output contact terminal 213 group of the plurality of first power devices 21a, 21b, 21c is electrically connected to the first output copper bar 40a, and the output contact terminal 223 group of the plurality of second power devices 22a, 22b, 22c is electrically connected to the second output copper bar 40b. In other words, the first power module 21 and the second power module 22 are electrically connected to the input copper bar 30 through the first long side wall 13a, and are electrically connected to the first output copper bar 40a and the second output copper bar 40b through the second long side wall 13b, realizing a single-input dual-output architecture on different sides of the narrow and long base 10.

Refer to Figures 1 to 4. In this embodiment, the input copper bar 30 is spatially opposite to the first long side wall 13a, and includes a first connecting portion 301 disposed on the first long side wall 13a, electrically connected to the first power module 21 and the second power module 22. The input copper bar 30 is, for example, a single set of DC input copper bars, including a positive input copper bar 31 and a negative input copper bar 32, which are spatially opposite to the first long side wall 13a. In this embodiment, the positive input copper bar 31 includes a plurality of positive input connection terminals 311, 312 and a positive bonding section 313. The plurality of positive input connection terminals 311 are spatially opposite to the first surface 11, and are electrically connected to the positive contact terminal 211 of the first power module 21. In addition, the plurality of positive input connection terminals 312 are spatially opposite to the second surface 12, and are electrically connected to the positive contact terminal 221 of the second power module 22. The plurality of positive input connection terminals 311 and the plurality of positive input connection terminals 312 are connected in parallel through the positive bonding section 313, and are then electrically connected to the first power module 21 and the second power module 22. In this embodiment, the negative input copper bar 32 includes a plurality of negative input connection terminals 321, 322 and a negative bonding section 323. The plurality of negative input connection terminals 321 are spaced relative to the first surface 11, and are electrically connected to the negative contact terminal 212 of the first power module 21. In addition, the plurality of negative input connection terminals 322 are spaced relative to the second surface 12, and are electrically connected to the negative contact terminal 222 of the second power module 22. The plurality of negative input connection terminals 321 and the plurality of negative input connection terminals 322 are connected in parallel through the negative bonding section 323, and are then electrically connected to the first power module 21 and the second power module 22. In this embodiment, the positive bonding section 313 and the negative bonding section 323 are spaced parallel to the first long side wall 13a. In this embodiment, the input copper bar 30 further includes an insulating isolation layer 33 disposed between the positive electrode bonding section 313 of the positive electrode input copper bar 31 and the negative electrode bonding section 323 of the negative electrode input copper bar 32. Furthermore, in this embodiment, the plurality of positive electrode input connection terminals 311 and the plurality of negative electrode input connection terminals 321 connected to the first power module 21 are alternately disposed in the direction from the first surface 11 to the second surface 12 (i.e., the Z-axis direction). The plurality of positive input connection terminals 312 and the plurality of negative input connection terminals 322 connected to the second power module 22 are arranged alternately with each other in the direction from the first surface 11 to the second surface 12 (i.e., the Z-axis direction). In this embodiment, the plurality of positive input connection terminals 311, 312 and the plurality of negative input connection terminals 321, 322 can also be fixed to a fixing frame 302 by screws and then locked to the first long side wall 13a. In this embodiment, the fixing frame 302 is fixed to the first long side wall 13a, respectively connected to the first surface 11 and the second surface 12, so as to support the structure of the positive input copper bar 31 and the negative input copper bar 32. The positive input copper bar 31 can be electrically connected to the positive contact terminal 211 of the first power module 21 along the first surface 11 and to the positive contact terminal 221 of the second power module 22 along the second surface 12 through the fixing frame 302, while the negative input copper bar 32 can be electrically connected to the negative contact terminal 212 of the first power module 21 along the first surface 11 and to the negative contact terminal 222 of the second power module 22 along the second surface 12 through the fixing frame 302. Of course, the present invention is not limited thereto. In this embodiment, the input copper bar 30 further includes an insulating protection layer 34, wherein the positive input copper bar 31, the insulating isolation layer 33 and the negative input copper bar 32 are disposed between the fixing frame 302 on the first long side wall 13a and the insulating protection layer 34, and are protected by the insulating protection layer 34. On the other hand, in this embodiment, the positive input copper bar 31 further includes a positive input terminal 310 connected to the positive bonding section 313, and the negative input copper bar 32 includes a negative input terminal 320 connected to the negative bonding section 323, and the positive input terminal 310 and the negative input terminal 320 are arranged parallel to each other. In this way, a single set of DC input copper bar 30 can be integrated from the bottom of the narrow elongated base 10 to the first long side wall 13a and then electrically connected to the first power module 21 and the second power module 22. In this embodiment, the input current conduction direction of the single set of DC input copper bars 30 can be, for example, as shown in FIG. 8 , introduced from the first surface 11 below the narrow elongated base 10 through the first long side wall 13a to the first power module 21 and the second power module 22 respectively.

Refer to Figures 1, 2A, 2B, and 5 to 7. In this embodiment, the first output copper bar 40a includes a second connecting portion 41a and an output terminal 42a. The second connecting portion 41a is electrically connected to the output contact terminal 213 of the first power module 21 along the first surface 11. The second connecting portion 41a of the first output copper bar 40a and the output contact terminal 213 of the first power module 21 can be fixed to the first surface 11 by screws to form an electrical connection. The output terminal 42a is assembled to abut against the contact terminal 90a of the load 9 along the direction from the first surface 11 to the second surface 12 (i.e., the Z-axis direction) and form an electrical connection. The second output copper bar 40b includes a second connecting portion 41b and an output terminal 42b. The second connection portion 41b is electrically connected to the output contact terminal 223 of the second power module 22 along the second surface 12. The second connection portion 41b of the second output copper bar 40b and the output contact terminal 223 of the second power module 22 can be fixed to the second surface 12 by screws to form an electrical connection. In other embodiments, the second connection portions 41a, 41b of the output copper bars 40a, 40b can also be connected to the output contact terminals 213, 223 of the first power module 21 and the second power module 22 by laser welding technology. The present case is not limited to this. In this embodiment, the second output terminal 42b is assembled to abut against the contact terminal 90b of the load 9 along the direction from the first surface 11 toward the second surface 12 (i.e., the Z-axis direction) and form an electrical connection. It should be noted that the first output copper bar 40a and the second output copper bar 40b are two sets of AC output copper bars, which can be independently connected to the load 9 to operate without interfering with each other. In this embodiment, when the dual inverter assembly structure 1 is connected to the load 9, the output terminal 42a of the first output copper bar 40a is further provided with an elastic force by an elastic component 50a to push the output terminal 42a along the direction from the first surface 11 to the second surface 12, and maintain the abutment between the output terminal 42a and the contact terminal 90a of the load 9. Similarly, when the dual inverter assembly structure 1 is docked with the load 9, the output terminal 42b of the second output copper bar 40b can provide an elastic force to push the output terminal 42b along the direction from the first surface 11 to the second surface 12 through another elastic component 50b, and maintain the abutment between the output terminal 42b and the contact terminal 90b of the load 9. In this way, the first output copper bar 40a and the second output copper bar 40b of the dual AC independent output can lead the output of the first power module 21 and the second power module 22 from the second long side wall 13b of the narrow elongated base 10 and then integrate them respectively on the top of the narrow elongated base 10, so as to form an electrical connection when the dual inverter assembly structure 1 is docked with the load 9 along, for example, the Z-axis direction. The output current conduction direction of the first output copper bar 40a and the second output copper bar 40b of the dual AC output can be, for example, as shown in Figure 9. The outputs of the first power module 21 and the second power module 22 are respectively led out from the second long side wall 13b of the narrow elongated base 10 and then integrated to the top of the second surface 12 of the narrow elongated base 10.

In this embodiment, the first power module 21 includes a plurality of first power devices 21a, 21b, and 21c, which are arranged on the first surface 11, arranged along the first direction (X-axis direction), and output through the first output copper bar 40a. The second power module 22 includes a plurality of second power devices 22a, 22b, and 22c, which are arranged on the second surface 12, and output through the second output copper bar 40b. The first output copper bar 40a and the second output copper bar 40b can be output in a confluence or a shunt.

As can be seen from the above, the narrow base 10, the first power module 21 and the second power module 22 are stacked vertically along the Z-axis direction, and the single DC input copper bar 30 and the first output copper bar 40a and the second output copper bar 40b of the dual AC output correspond to the first long side wall 13a and the second long side wall 13b on the narrow base 10 respectively, so as to form a dual inverter assembly structure 1 with bottom input and top output. When the first power module 21 and the second power module 22 increase the number of first power devices 21a, 21b, 21c and second power devices 22a, 22b, 22c according to actual application requirements, the dual inverter assembly structure 1 only needs to increase the corresponding length of the first long side wall 13a and the second long side wall 13b along the first direction. Of course, the number of the single set of DC input copper bars 30 and the first output copper bars 40a and the second output copper bars 40b of the dual set of AC outputs can also be adjusted according to the actual application requirements. In addition, the extension of the dual inverter assembly structure 1 along the first direction (i.e., the X-axis direction) can be achieved by changing the length of the first long side wall 13a and the second long side wall 13b, and the height limit in the vertical stacking direction (i.e., the Z-axis direction) can be achieved by changing the configuration of the narrow elongated base 10, the first power module 21, the second power module 22, the positive input terminal 310, the negative input terminal 320, the output terminals 42a, 42b and the elastic components 50a, 50b, and the aforementioned many technical features can be combined and changed according to the actual application requirements.

Figures 10, 11 and 12 disclose a dual inverter assembly structure 1a of another embodiment of the present invention. In this embodiment, the dual inverter assembly structure 1a is similar to the dual inverter assembly structure 1 shown in Figures 1 to 8, and the same component numbers represent the same components, structures and functions, which will not be repeated here. In this embodiment, the illustration of the first power module 21 and the second power module 22 is omitted to facilitate the explanation of the space utilization of the dual inverter assembly structure 1a, which does not limit the present invention and is explained first. The corresponding elongated base 10, input copper bar 30 and two output copper bars 40a, 40b of the first power module 21 and the second power module 22 can be referred to as shown in Figures 1 to 8. It is worth noting that in this embodiment, the positive input terminal 310 and the negative input terminal 320 of the input copper bar 30 only occupy part of the space below the first side 11 of the narrow elongated base 10, and the downward leading angle can be adjusted according to the actual application requirements to improve the space utilization. In this embodiment, the dual inverter assembly structure 1a further includes a control board 60, which is stacked on the first side 11 of the narrow elongated base 10, that is, it is set below the narrow elongated base 10. In order to obtain the maximum utilization space of the dual inverter assembly structure 1a, the control board 60 can be tilted, for example, along a vehicle body fixing frame (not shown) or, for example, along an angle of a shell structure (not shown) covering the dual inverter assembly structure 1, and the positive input terminal 310 and the negative input terminal 320 of the input copper bar 30 can extend along the surface of the control board 60 to form the most compact structure. Of course, in order to obtain the most compact structure, the cooling water channel inlet 15 and the cooling water channel outlet 16 of the elongated base 10 can also be led out from the first surface 11 of the elongated base 10, while avoiding the control board 60, the positive input end 310 of the positive input copper bar 31, and the negative input end 320 of the negative input copper bar 32. The present invention is not limited thereto. On the other hand, the dual inverter assembly structure 1a further includes a capacitor module (Bulk Cap) 70, which is stacked on the second surface 12 of the elongated base 10 and is located between the output terminal 42a of the first output copper bar 40a and the output terminal 42b of the second output copper bar 40b and the second surface 12 of the elongated base 10, without affecting the operation of the output terminals 42a, 42b and the contact terminals 90a, 90b of the load 9. When the dual inverter assembly structure 1a is docked and assembled with the load 9, the output terminals 42a, 42b can be electrically connected to the contact terminals 90a, 90b synchronously through the action of the elastic components 50a, 50b (refer to Figure 1). Of course, the arrangement of the output terminals 42a, 42b and the elastic components 50a, 50b can be changed according to the configuration of the contact terminals 90a, 90b, and the capacitor module 70 can be avoided at the same time to achieve the purpose of a compact structure. In addition, the capacitor module 70 located on the second side 12 of the narrow base 10 can form a consistent conductive distance corresponding to the first power devices 21a, 21b, 21c of the first power module 21 and the second power devices 22a, 22b, 22c of the second power module 22, and minimize the conductive distance (refer to Figure 1).

Furthermore, in this embodiment, the output terminal 42a in the first output copper bar 40a and the corresponding elastic component 50a and the contact terminal 90a are arranged at the bottom (Z-axis direction) projection position beyond the first power module 21, the second power module 22 and the capacitor module 70 in the first direction. In other words, the output terminal 42a in the first output copper bar 40a and the corresponding elastic component 50a and the contact terminal 90a are arranged in a misaligned position with the first power module 21, the second power module 22 and the capacitor module 70 in the Z-axis viewing direction. In addition, in this embodiment, when the output terminal 42a in the first output copper bar 40a and the output terminal 42b in the second output copper bar 40b are disposed on the elongated base 10, they can be further arranged correspondingly on the elongated base 10, and the top end of the capacitor module 70 is lower than the bottom end of the contact terminals 90a and 90b. In one embodiment, when the output terminal 42a in the first output copper bar 40a and the output terminal 42b in the second output copper bar 40b are disposed on the elongated base 10, they can be further arranged on the elongated base 10 to be arranged on a plane parallel to the second surface 12. In addition, the control board 60 can extend obliquely from the bottom of the elastic component 50a corresponding to the first output copper bar 40a to the bottom of the first power module 21, and the positive input terminal 310 and the negative input terminal 320 of the input copper bar 30 can extend along the space above the control board 60 and below the first power module 21, thereby forming the most compact structure. In this way, the dual inverter assembly structure 1a can achieve the optimal configuration of the narrow power module in a limited space in a single-input dual-output manner, and improve the overall space utilization. Of course, the present case is not limited to this, and will not be elaborated.

In summary, this case provides a dual-inverter assembly structure that integrates narrow power modules in a limited space in a single-input dual-output manner and improves overall space utilization. Two sets of power modules are stacked up and down on a narrow base, a single set of DC input copper bars are integrated from the bottom to one side and then electrically connected to the two sets of power modules, and dual sets of AC output copper bars are electrically connected to the two sets of power modules from the other side and then led to the top for integration, which can effectively integrate the utilization of the upper and lower spaces of the stacking structure. If the capacitor module (Bulk Cap) required for the dual-inverter assembly structure is stacked on top of the assembly structure, the distance between the capacitor module and the two sets of power modules can be minimized and kept as consistent as possible with the distance between the power devices of each power module. The cooling channel of the internal structure of the narrow base can enter and exit from the space below, serving as a cooling structure for the two power modules and capacitor modules. The two sets of AC output copper bars are restricted by the docking direction of the load end, and elastic components can be set up separately to provide appropriate elastic force to maintain the output copper bars and the load in stable contact. On the other hand, the control board required for the dual-inverter assembly structure can be set below the assembly structure to make full use of the space below. In this way, the dual-inverter assembly structure can achieve the optimal configuration of the narrow power module in a limited space in a single-input dual-output manner, and improve the overall space utilization.

This case can be modified in various ways by people familiar with this technology, but it will not deviate from the scope of protection of the attached patent application.

1: Dual inverter assembly structure 10: Narrow base 13a: First long side wall 13b: Second long side wall 15: Cooling water channel inlet 16: Cooling water channel outlet 21: First power module 22: Second power module 223: Output contact terminal 30: Input copper bar 302: Fixing frame 31: Positive input copper bar 32: Negative input copper bar 40a: First output copper bar 41a: Second connection part 42a: Output terminal 40b: Second output copper bar 41b: Second connection part 42b: Output terminal 50a, 50b: Elastic component 9: Load 90a, 90b: contact terminals X, Y, Z: axes

Claims (20)

A dual inverter assembly structure includes: a narrow elongated base, including a first surface, a second surface, a first long side wall and a second long side wall, wherein the first surface and the second surface are arranged opposite to each other, and the first long side wall and the second long side wall are arranged opposite to each other and extend along a first direction; a first power module, arranged along the first direction on the first surface; a second power module, arranged along the first direction on the second surface; an input copper bar, spatially opposite to the first long side wall, partially extending from the first long side wall to the first surface and the second surface, and including a first connecting portion arranged on the first long side wall, electrically connected to the first power module and the second side wall; The second power module, wherein the input copper bar is a DC input copper bar, including a positive input copper bar and a negative input copper bar; and two output copper bars, which are spatially opposite to the second long side wall and partially extend from the second long side wall to the first surface and the second surface, wherein the two output copper bars are two AC output copper bars, each of the two output copper bars includes a second connecting portion, which is adjacently arranged on the second long side wall, and the second connecting portion of one of the two output copper bars is electrically connected to an output contact terminal of the first power module along the first surface, and the second connecting portion of the other of the two output copper bars is electrically connected to an output contact terminal of the second power module along the second surface. The dual inverter assembly structure as described in claim 1, wherein the positive input copper bar includes a positive bonding section, and the negative input copper bar includes a negative bonding section, which are spatially parallel to the first long side wall. The dual inverter assembly structure as described in claim 2, wherein the positive input copper bar includes a positive input terminal connected to the positive bonding section, the negative input copper bar includes a negative input terminal connected to the negative bonding section, and the positive input terminal and the negative input terminal are arranged parallel to each other. The dual inverter assembly structure as described in claim 3, wherein the positive input copper bar includes a plurality of positive input connection terminals, which are spatially opposite to the first surface and the second surface, connected in parallel to each other through the positive bonding section, and electrically connected to the first power module and the second power module. The dual inverter assembly structure as described in claim 4, wherein the negative input copper bar includes a plurality of negative input connection terminals, which are spatially relative to the first surface and the second surface, are connected in parallel through the negative bonding section, and are electrically connected to the first power module and the second power module. The dual inverter assembly structure as described in claim 5, wherein the plurality of positive input connection terminals and the plurality of negative input connection terminals are arranged alternately with each other in the direction from the first surface toward the second surface. The dual inverter assembly structure as described in claim 1, wherein the input copper bar includes an insulating isolation layer disposed between the positive input copper bar and the negative input copper bar. The dual inverter assembly structure as described in claim 7, wherein the input copper bar includes an insulating protection layer, and the positive input copper bar, the insulating isolation layer and the negative input copper bar are disposed between the first long side wall and the insulating protection layer. The dual inverter assembly structure as described in claim 1, wherein the input copper bar further includes a fixing frame, which is arranged on the first long side wall and connected to the first surface and the second surface respectively, the positive input copper bar is electrically connected to a positive contact terminal of the first power module along the first surface and to a positive contact terminal of the second power module along the second surface respectively through the fixing frame, and the negative input copper bar is electrically connected to a negative contact terminal of the first power module along the first surface and to a negative contact terminal of the second power module along the second surface respectively through the fixing frame. The dual inverter assembly structure as described in claim 1, wherein the two output copper bars include a first output copper bar and a second output copper bar, the first output copper bar and the second output copper bar each include an output terminal, and are assembled to abut against a load along the direction from the first surface toward the second surface to form an electrical connection. The dual inverter assembly structure as described in claim 10, wherein the first power module includes a plurality of first power devices, which are arranged on the first surface and output through the first output copper bar, and the second power module includes a plurality of second power devices, which are arranged on the second surface and output through the second output copper bar, wherein the first output copper bar and the second output copper bar are output in a confluence manner. The dual inverter assembly structure as described in claim 10, wherein the first power module includes a plurality of first power devices, which are arranged on the first surface and output through the first output copper bar, and the second power module includes a plurality of second power devices, which are arranged on the second surface and output through the second output copper bar, wherein the first output copper bar and the second output copper bar are output in a split current manner. As described in claim 10, when the dual inverter assembly structure is docked with the load, the output terminal provides an elastic force through an elastic component to push the output terminal along the direction from the first surface toward the second surface, and maintain the output terminal in abutment with the load. The dual inverter assembly structure as described in claim 10, wherein the second connection portion of the first output copper bar is electrically connected to the first power module, and the second connection portion of the second output copper bar is electrically connected to the second power module. A dual inverter assembly structure as described in claim 10, wherein the first power module includes a plurality of first power devices arranged at equal intervals along the first direction, and wherein the second power module includes a plurality of second power devices arranged at equal intervals along the first direction. The dual inverter assembly structure as described in claim 15, wherein each of the plurality of first power devices and the plurality of second power devices comprises a positive contact terminal, a negative contact terminal and the output contact terminal, the positive contact terminals and the negative contact terminals are spatially opposite to the first long side wall and electrically connected to the input copper bar, the output contact terminals are spatially opposite to the second long side wall, and the output contact terminals of the plurality of first power devices are electrically connected to the first output copper bar, and the output contact terminals of the plurality of second power devices are electrically connected to the second output copper bar. The dual inverter assembly structure as described in claim 1, wherein the elongated base includes a cooling water channel, a cooling water channel inlet and a cooling water channel outlet, the cooling water channel is arranged in the elongated base and is thermally coupled to the first power module and the second power module, the cooling water channel inlet and the cooling water channel outlet are arranged on the first surface and connected to the cooling water channel. The dual inverter assembly structure as described in claim 1 further includes a control board stacked on the first surface of the elongated base, and a positive input end of the positive input copper bar and a negative input end of the negative input copper bar extend along a surface of the control board. The dual inverter assembly structure as described in claim 1 further includes a capacitor module stacked on the second surface of the narrow elongated base and located between an output terminal of the two output copper bars and the second surface of the narrow elongated base. The dual inverter assembly structure as described in claim 19, wherein the two output copper bars include a first output copper bar and a second output copper bar, the output terminal in the first output copper bar and the corresponding elastic component are arranged at the bottom projection position beyond the first power module, the second power module and the capacitor module in the first direction; the output terminal in the first output copper bar and the output terminal in the second output copper bar are arranged on the elongated base in a plane parallel to the second surface, wherein the dual inverter assembly structure further includes a control board arranged below the elastic component and extending obliquely to below the first power module, and the input copper bar extends along the space above the control board and below the first power module.

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