Inverter

Abstract

The utility model discloses an inverter. The inverter comprises a first housing; the capacitor is arranged on one side of the first shell in the first direction; the power module comprises a connecting plate, the power module is arranged on one side, opposite to the capacitor, of the first shell in the first direction, the connecting plate comprises an input end and an output end which are arranged at an interval in the second direction, the output end comprises an output copper bar, and the output copper bar and the connecting plate are integrally arranged; and the plurality of groups of input copper bars are used for connecting the input end and the capacitor, the plurality of groups of input copper bars are arranged at intervals along a third direction, each group of input copper bars comprises a positive electrode copper bar and a negative electrode copper bar which are arranged at intervals along the third direction, and the positive electrode copper bars and the negative electrode copper bars are tiled in the third direction. According to the utility model, the height of the inverter can be reduced, point locations needing to be welded during assembly are reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of inverters, in particular to an inverter. Background Art

[0002] With the continuous development of automotive electrification technology, the increasing complexity of internal automotive systems and the increasing space constraints, the integration and miniaturization of power electronics systems have become an inevitable trend. This is an indispensable part of the development of the automotive manufacturing industry in electrification, digitalization, networking and intelligence.

[0003] Inverters convert direct current from the battery into the three-phase alternating current required by the motor. Both hybrid and pure electric vehicles feature inverters. Capacitors in inverters primarily block ripple current and eliminate DC bus voltage fluctuations. They also protect power devices such as IGBTs (Insulated Gate Bipolar Transistors).

[0004] In the prior art, the power modules of the inverter are stacked with capacitors in the vertical direction. The capacitors are electrically connected to the power modules via positive and negative copper bars. To prevent the positive and negative copper bars from short-circuiting, a baffle is provided between the positive and negative copper bars along the height direction of the inverter to increase the height of the inverter. Both ends of the positive and negative copper bars need to be welded separately. During assembly, the positive copper bar needs to be welded first, and then the negative copper bar. In addition, the three-phase output copper bars of the inverter in the prior art need to be connected to the power modules via transition copper bars, which are then welded to the power modules.

[0005] It can be seen from this that the inverter in the prior art has at least technical problems such as occupying a large space in the height direction and requiring many welding points during assembly, which increases the cost. Utility Model Content

[0006] The purpose of this utility model is to solve the technical problem of inverters taking up a large amount of space in the height direction and requiring multiple welding points during assembly, which increases costs. This utility model provides an inverter that can reduce the height of the inverter and reduce the number of welding points required during assembly, thereby reducing costs.

[0007] To solve the above technical problems, the present invention discloses an inverter, which is characterized by comprising:

[0008] a first shell;

[0009] a capacitor, the capacitor being disposed on one side of the first housing in the first direction;

[0010] A power module including a connecting plate. Along the first direction, the power module is disposed on a side of the first housing facing away from the capacitor. Along the second direction, the connecting plate includes an input end and an output end spaced apart. The output end includes an output copper busbar, which is integrally provided with the connecting plate.

[0011] Multiple groups of input copper bars are used to connect the input end and the capacitor, the multiple groups of input copper bars are arranged at intervals along the third direction, each group of the input copper bars includes a positive copper bar and a negative copper bar arranged at intervals along the third direction, and the positive copper bar and the negative copper bar are arranged flat in the third direction.

[0012] With the above technical solution, on the one hand, the output copper busbar and the connection plate of the power module are integrally formed, and there is no need to add an additional transition copper busbar between the output copper busbar and the power module, which can reduce additional hardware costs. In addition, there is no need to weld between the output copper busbar and the power module, which can reduce the number of points that need to be welded during assembly, further reducing assembly costs. On the other hand, the positive and negative copper busbars are arranged flat and spaced along the third direction, without the need for additional baffles. This can not only reduce costs but also reduce the height of the inverter. During assembly, there is no need to weld the positive and negative copper busbars multiple times separately. The welding of the positive and negative copper busbars can be completed in a single operation, further reducing the number of points that need to be welded during assembly.

[0013] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an inverter, wherein each group of the input copper bars includes a first positive copper bar, a second positive copper bar and a negative copper bar, and along the third direction, the negative copper bar is arranged between the first positive copper bar and the second positive copper bar.

[0014] By adopting the above technical solution, along the third direction, the negative copper busbar is arranged between the first positive copper busbar and the second positive copper busbar, and a partition plate is arranged in the height direction of the inverter, which can reduce the height of the inverter.

[0015] According to another specific embodiment of the present invention, the embodiment of the present invention discloses an inverter, which includes a driving board and a shielding plate. Along the first direction, the power module is arranged between the shielding plate and the capacitor, and the shielding plate is arranged between the driving board and the power module. The inverter includes a plurality of first connecting parts, and the plurality of first connecting parts are arranged at intervals in the first shell along the third direction. Each first connecting part is arranged between two adjacent groups of the input copper bars, and the driving board and the shielding plate are detachably connected to the first shell through the first connecting parts.

[0016] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an inverter, each of the first connecting parts includes a first threaded hole, the drive plate includes a first bolt, and along the first direction, the first bolt passes through the drive plate and the shielding plate in sequence to cooperate with the first threaded hole to achieve a detachable connection.

[0017] By adopting the above technical solution, along the first direction, the first bolt passes through the drive plate, the shielding plate and the first threaded hole in sequence to achieve a detachable connection. The first bolt is a standard part and does not require additional design of the connection part, which can simplify the assembly steps and reduce costs.

[0018] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an inverter, the capacitor includes a second shell, along the first direction, the second shell is arranged on the side of the first shell facing away from the power module, and the second shell is integrally formed with the first shell.

[0019] By adopting the above technical solution, the first housing and the second housing do not need to be connected by a connector, which can further reduce the height and cost of the inverter.

[0020] According to another specific embodiment of the present invention, the embodiment of the present invention discloses an inverter, which includes a cooling channel. Along the first direction, the cooling channel is arranged between the capacitor and the power module. The cooling channel is integrally formed with the first shell. There is no heat conductor between the cooling channel and the capacitor. The cooling channel is respectively arranged to fit the capacitor and the power module on both sides in the first direction.

[0021] With the above technical solution, the cooling channel is integrally formed with the first shell, and the cooling channel is respectively fitted with the capacitor and the power module on both sides in the first direction. In this way, there is no need to use a heat-conducting member (such as thermally conductive glue) to assist in cooling the capacitor, thereby reducing the number of parts, and can both reduce the height of the inverter and improve the heat dissipation efficiency.

[0022] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an inverter, which includes a mounting plate. Along the first direction, the power module is arranged on the side of the mounting plate facing away from the capacitor. The first shell includes a plurality of second threaded holes, and the plurality of second threaded holes are arranged at intervals around the cooling channel. The mounting plate includes a plurality of second bolts, and each second bolt corresponds to each second threaded hole one by one.

[0023] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an inverter, wherein along the first direction, the first shell has an opening on a side facing away from the capacitor, and the mounting plate covers the opening to form the cooling channel.

[0024] By adopting the above technical solution, the mounting plate is covered on the opening to form a cooling channel. The heat of the power module can be directly transferred to the coolant through the mounting plate. Compared with the existing technology, the heat of the power module needs to pass through the mounting plate and the shell of the cooling channel in turn and then be transferred to the coolant. This solution can improve the heat dissipation efficiency of the cooling channel for the power module.

[0025] According to another specific embodiment of the present invention, an embodiment of the present invention discloses an inverter, wherein the cooling channel includes a liquid inlet channel and a liquid outlet channel, and along the third direction, the liquid inlet channel and the liquid outlet channel are spaced apart on both sides of the power module. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 An exploded view of an inverter in some embodiments is shown.

[0027] Figure 2 A cross-sectional view of an inverter is shown in some embodiments.

[0028] Figure 3 An exploded view of an inverter provided in an embodiment of the present application is shown.

[0029] Figure 4 A cross-sectional view of an inverter provided in an embodiment of the present application is shown.

[0030] Figure 5 A three-dimensional schematic diagram of a power module of an inverter provided in an embodiment of the present application is shown.

[0031] Figure 6 A three-dimensional schematic diagram of an inverter provided in an embodiment of the present application is shown.

[0032] Figure 7 A schematic diagram of bolt and thread assembly of an inverter provided in an embodiment of the present application is shown.

[0033] Figure 8 A schematic diagram of the liquid inlet channel and the liquid outlet channel of the inverter provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0034] The following is an explanation of the implementation of the present invention by means of specific specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation. On the contrary, the purpose of introducing the utility model in conjunction with the implementation is to cover other options or modifications that may be extended based on the claims of the present invention. In order to provide an in-depth understanding of the present invention, the following description will contain many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0035] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0036] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the utility model.

[0037] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0038] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0040] In some embodiments, see Figure 1 、 Figure 2From top to bottom along the first direction X, the inverter 10 includes a driving board 11, a shielding board 12, a power module 13 and a capacitor 14 in sequence.

[0041] Exemplarily, the inverter 10 includes a housing 17, which includes a connecting groove 171. A first connecting portion 172 is provided in the connecting groove 171. Along the first direction X, the first connecting portion 172 passes through the power module 13 and the shielding plate 12 in sequence. A second connecting portion 173 is provided on the drive plate 11. The second connecting portion 173 cooperates with the first connecting portion 172. Specifically, the first connecting portion 172 has a designed threaded hole, and the second connecting portion 173 has a designed stud. A cooling channel 15 is provided between the capacitor 14 and the power module 13. Since there is a gap between the capacitor 14 and the cooling channel 15 (not shown in the figure), the heat generated by the capacitor 14 needs to be dissipated through the gap, and the heat dissipation efficiency is low. Therefore, along the first direction X, a thermal conductive adhesive 151 is provided between the capacitor 14 and the cooling channel 15.

[0042] In addition, the power module is provided with a positive copper bar 131 and a negative copper bar 132 on one side of the second direction Y. The positive copper bar 131 and the negative copper bar 132 are both extended along the third direction Z. The positive copper bar 131 and the negative copper bar 132 are spaced apart in the first direction X. A separator 133 is also provided between the positive copper bar 131 and the negative copper bar 132 to prevent short circuiting between the positive copper bar 131 and the negative copper bar 132. The power module 13 is provided with a three-phase output copper bar 16 on the other side of the second direction Y. The three-phase output copper bar 16 and the power module 13 are connected via a three-phase output transition copper bar 161.

[0043] The above technical solution has at least the following disadvantages:

[0044] ① The presence of thermal conductive adhesive 151 between the capacitor 14 and the cooling channel 15 will increase the height of the inverter 10, making it inconvenient to arrange the inverter 10 in the limited space of the vehicle.

[0045] ② Providing a partition plate 133 between the positive copper busbar 131 and the negative copper busbar 132 will further increase the height of the inverter 10, making it inconvenient to arrange the inverter 10 in the limited space of the vehicle.

[0046] ③ Since the positive copper busbar 131 and the negative copper busbar 132 are spaced apart in the first direction X, and the partition plate 133 is provided, the distance between the power module 13 and the drive plate 11 in the first direction X is increased. Therefore, the drive plate 11, the shielding plate 12 and the power module 13 cannot be fixed to the housing by standard bolts. It is necessary to design non-standard parts such as the aforementioned first connecting part and the second connecting part to achieve connection, which increases additional costs.

[0047] ④ The inverter 10 includes a partition plate 133, a three-phase output transition copper busbar 161, a thermal conductive adhesive 151 and other parts. The large number of parts increases the manufacturing cost.

[0048] ⑤ When assembling the inverter 10, it is necessary to first weld the two ends of the positive copper busbar 131 to the power module 13 and the capacitor 11 respectively, and then weld the two ends of the negative copper busbar 132 to the power module 13 and the capacitor 11 respectively. In addition, it is necessary to weld the two ends of the three-phase output transition copper busbar 161 in the second direction Y to the power module 13 and the three-phase output copper busbar 16 respectively. In this way, the inverter 10 includes at least six welding points during the assembly process, which increases the cost of welding equipment, fixtures, and weld inspection, thereby increasing the overall assembly cost.

[0049] In some embodiments, see Figure 3 、 Figure 4 、 Figure 5 The present application provides an inverter 20, comprising a first housing 21, a capacitor 22, a power module 23, and multiple sets of input copper busbars 24. The capacitor 22 is disposed on one side of the first housing 21 in a first direction X. The power module 23 includes a connecting plate 231. Along the first direction X, the power module 23 is disposed on the side of the first housing 21 facing away from the capacitor 22. Along the second direction Y, the connecting plate 231 includes an input terminal 2311 and an output terminal 2312 spaced apart. The output terminal 2312 includes an output copper busbar 2313, which is integrally arranged with the connecting plate 231. Multiple sets of input copper busbars 24 are used to connect the input terminal 2311 and the capacitor 22. The multiple sets of input copper busbars 24 are spaced apart along a third direction Z. Each set of input copper busbars 24 includes a positive copper busbar 241 and a negative copper busbar 242 spaced apart along the third direction Z. The positive copper busbar 241 and the negative copper busbar 242 are arranged flat in the third direction Z.

[0050] In some embodiments, the inverter 20 is arranged in a rectangular parallelepiped shape as a whole, the first direction X is the height direction of the inverter 20, the second direction Y is the short side direction of the inverter 20, and the third direction Z is the long side direction of the inverter 20.

[0051] By adopting the above technical solution, on the one hand, the output copper bus 2313 is integrally arranged with the connecting plate 231, and there is no need to add an additional transition copper bus between the output copper bus 2313 and the power module 23, which can reduce additional hardware costs, and there is no need to weld between the output copper bus 2313 and the power module 23, which can reduce the points that need to be welded during assembly, and can further reduce assembly costs. On the other hand, the positive copper bus 241 and the negative copper bus 242 are arranged in a flat manner along the third direction Z, without the need to set up an additional baffle, which can not only reduce costs, but also reduce the height of the inverter 20. Moreover, during assembly, there is no need to weld the positive copper bus 241 and the negative copper bus 242 multiple times, and the welding of the positive copper bus 241 and the negative copper bus 242 can be completed in one operation, further reducing the points that need to be welded during assembly.

[0052] In some embodiments, see Figure 3 、 Figure 4 、 Figure 5 The inverter 20 includes a driver board 25 and a shielding plate 26. Along a first direction X, the power module 23 is disposed between the shielding plate 26 and the capacitor 22. The shielding plate 26 is disposed between the driver board 25 and the power module 23. The capacitor 22 and the power module 23 are electrically connected via multiple sets of input copper busbars 24. The shielding plate 26 has through-holes 261, through which the electronic components 235 of the power module 23 are electrically connected to the driver board 25. The shielding plate 26 is an EMC (Electromagnetic Compatibility) shielding plate, used to improve the inverter 20's ability to resist electromagnetic interference.

[0053] In some embodiments, the capacitor 22 includes a second housing 221. Along the first direction X, the second housing 221 is provided on a side of the first housing 21 facing away from the power module 23. The second housing 221 is integrally formed with the first housing 21. For example, the first housing 21 is provided in a rectangular plate shape, and the second housing 221 is provided in a rectangular parallelepiped shape. The electrolyte, electrodes, and other parts of the capacitor 22 are all provided in the second housing 221. It is understandable that the present application does not limit the shapes of the first housing 21 and the second housing 221. For example, the first housing 21 and the second housing 221 may also be other shapes such as an ellipse, and the present application does not limit this.

[0054] In some embodiments, see Figure 3 、 Figure 4 、 Figure 5The power module 23 includes a first part 232, a second part 233, and a third part 234. The first part 232, the second part 233, and the third part 234 are arranged at intervals along the second direction Y. Each part includes a connecting plate 231. The inverter 20 includes three groups of input copper bars 24. Each group of input copper bars 24 is arranged in a one-to-one correspondence with each part of the power module 23. Each group of input copper bars 24 includes a first positive copper bar 2411, a second positive copper bar 2412, and a negative copper bar 242. Along the third direction Z, the negative copper bar 242 is arranged between the first positive copper bar 2411 and the second positive copper bar 2412. It can be understood that the power module 23 can also include 2 parts, 4 parts, 5 parts, etc. Correspondingly, the inverter 20 can include 2 groups of input copper bars, 4 groups of input copper bars, 5 groups of input copper bars, etc., and each group of output copper bars 24 can also include 1 positive copper bar and 1 negative copper bar, etc., which is not limited in this application.

[0055] In some embodiments, see Figure 5 、 Figure 6 、 Figure 7 The inverter 20 includes a plurality of first connection parts 27, which are spaced apart on the first housing 21 along the third direction Z. Each first connection part 27 is provided between two adjacent groups of input copper bars 24. The drive plate 25 and the shielding plate 26 are detachably connected to the first housing 21 through the first connection parts 27. Exemplarily, the inverter 20 includes two groups of first connection parts, which are spaced apart on both sides of the first housing 21 in the third direction Z. Each group of first connection parts includes two first connection parts 27, and the first connection parts 27 are protruded from the first housing 21 along the first direction X toward the drive plate 25. Exemplarily, the first connection part 27 is cylindrical. It can be understood that the present application does not limit the shape of the first connection part 27. For example, the first connection part 27 can also be a rectangular parallelepiped or other shape.

[0056] In some embodiments, see Figure 5 、 Figure 6 、 Figure 7 Each first connection portion 27 includes a first threaded hole 271, and the drive plate 25 includes a first bolt 251. Along the first direction X, the first bolt 251 sequentially passes through the drive plate 25 and the shielding plate 26 and cooperates with the first threaded hole 271 to achieve a detachable connection. For example, the drive plate 25 includes four first bolts 251, and the four first bolts 251 correspond to the first threaded holes 271 of the four first connection portions 27 (e.g., Figure 3 、 Figure 7 It is understandable that the number of the first connecting parts 27 can be 3, 4, 5, etc., and the number of the first bolts 251 can also be 3, 4, 5, etc., which is not limited in this application.

[0057] By adopting the above technical solution, along the first direction X, the first bolt 251 passes through the drive plate 25 and the shielding plate 26 in sequence and cooperates with the first threaded hole 271 to realize a detachable connection. The first bolt 251 is a standard part and does not require an additional connection part to be designed, which can simplify the assembly steps and reduce costs.

[0058] In some embodiments, see Figure 5 、 Figure 6 、 Figure 7 The inverter 20 includes a mounting plate 28. Along the first direction X, the power module 23 is arranged on the side of the mounting plate 28 facing away from the capacitor 22. The first housing 21 includes a plurality of second threaded holes 211. The plurality of second threaded holes 211 are arranged at intervals around the cooling channel 29 of the inverter 20. The mounting plate 28 includes a plurality of second bolts 281. Each second bolt 281 is matched with each second threaded hole 211 in a one-to-one manner (e.g., Figure 3 、 Figure 7 (shown by the dashed line b). For example, the first housing 21 includes eight second threaded holes 211, and the mounting plate 28 includes eight second bolts 281. It is understood that the number of second threaded holes 211 may be five, six, seven, nine, ten, or the like, and the number of second bolts 281 may be five, six, seven, nine, ten, or the like, and this application does not limit this.

[0059] In some embodiments, see Figure 5 、 Figure 6 、 Figure 7 The first shell 21 also includes four second connecting parts 212, and the four second connecting parts 212 are arranged in pairs relative to each other along the second direction Y. Each second connecting part 212 includes a third threaded hole 2121, and the drive plate 25 includes a third bolt (not shown in the figure). Along the first direction X, the third bolt passes through the drive plate 25 and the shielding plate 26 in sequence and cooperates with the third threaded hole 2121 to achieve a detachable connection.

[0060] In some embodiments, see Figure 5 、 Figure 6 、 Figure 7 The first housing 21 includes three third connection portions 213. The three third connection portions 213 are disposed on one side of the first housing 21 in the second direction Y, near the output copper busbar 2313. The three third connection portions 213 are spaced apart along the third direction Z. Exemplarily, the output copper busbar 2313 is a three-phase output copper busbar 2313, with three output copper busbars 2313 for the three phases U, V, and W, respectively. Each third connection portion 213 corresponds to each output copper busbar 2313, providing support and fixing for the output copper busbar 2313.

[0061] The bolts provided in any of the aforementioned embodiments are all standard parts and do not require special design, which can further reduce the manufacturing cost of the inverter 20.

[0062] In some embodiments, see Figure 7 、 Figure 8 Combined with Figure 3 As shown, the inverter 20 includes a cooling channel 29. Along the first direction X, the cooling channel 29 is provided between the capacitor 22 and the power module 23. The cooling channel 29 is integrally formed with the first housing 21. No heat conducting member is provided between the cooling channel 29 and the capacitor 22. The cooling channel 29 is respectively fitted with the capacitor 22 and the power module 23 on both sides in the first direction X. Using the above technical solution, the cooling channel 29 is integrally formed with the first housing 21. The cooling channel 29 is respectively fitted with the capacitor 22 and the power module 23 on both sides in the first direction X. In this way, there is no need to use thermally conductive adhesive to assist in heat dissipation of the capacitor 22, which reduces the number of parts, reduces the height of the inverter, and improves heat dissipation efficiency.

[0063] In some embodiments, see Figure 7 、 Figure 8 Combined with Figure 3 As shown, along the first direction X, the first housing 21 has an opening 214 on a side facing away from the capacitor 22. The mounting plate 28 covers the opening 214 to form a cooling channel 29. With the above technical solution, the mounting plate 28 covers the opening 214 to form the cooling channel 29, thereby improving the heat dissipation efficiency of the cooling channel 29 for the power module 23.

[0064] In some embodiments, see Figure 4 、 Figure 7 、 Figure 8 The cooling channel 29 includes a liquid inlet channel 291 and a liquid outlet channel 292. Along the third direction Z, the liquid inlet channel 291 and the liquid outlet channel 292 are spaced apart on either side of the power module 23. For example, a sealing ring 293 is provided between the mounting plate 28 and the first housing 21. Both the liquid inlet channel 291 and the liquid outlet channel 292 are hollow rectangular parallelepiped-shaped and extend along the first direction X. Along the first direction X, the liquid inlet channel 291 has a liquid inlet 2911 on the side facing away from the mounting plate 28, and the liquid outlet channel 292 has a liquid outlet 2921 on the side facing away from the mounting plate 28.

[0065] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above description is provided to further illustrate the present invention in conjunction with specific embodiments, and that the present invention should not be construed as being limited to these descriptions. Those skilled in the art may make various changes in form and detail, including simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An inverter, characterized in that: include: a first shell; a capacitor, the capacitor being disposed on one side of the first housing in the first direction; A power module including a connecting plate. Along the first direction, the power module is disposed on a side of the first housing facing away from the capacitor. Along the second direction, the connecting plate includes an input end and an output end spaced apart. The output end includes an output copper busbar, which is integrally provided with the connecting plate. Multiple groups of input copper bars are used to connect the input end and the capacitor, the multiple groups of input copper bars are arranged at intervals along the third direction, each group of the input copper bars includes a positive copper bar and a negative copper bar arranged at intervals along the third direction, and the positive copper bar and the negative copper bar are arranged flat in the third direction.

2. The inverter according to claim 1, wherein: Each group of the input copper bars includes a first positive copper bar, a second positive copper bar and a negative copper bar. Along the third direction, the negative copper bar is arranged between the first positive copper bar and the second positive copper bar.

3. The inverter according to claim 1 or 2, characterized in that: The inverter includes a drive board and a shielding plate. Along the first direction, the power module is arranged between the shielding plate and the capacitor, and the shielding plate is arranged between the drive board and the power module. The inverter includes a plurality of first connecting portions, which are arranged at intervals in the first shell along the third direction. Each first connecting portion is arranged between two adjacent groups of the input copper bars. The drive board and the shielding plate are detachably connected to the first shell through the first connecting portions.

4. The inverter according to claim 3, characterized in that Each of the first connection parts includes a first threaded hole, and the drive plate includes a first bolt. Along the first direction, the first bolt sequentially passes through the drive plate and the shielding plate and cooperates with the first threaded hole to achieve a detachable connection.

5. The inverter according to claim 1, wherein: The capacitor includes a second shell. Along the first direction, the second shell is arranged on a side of the first shell facing away from the power module. The second shell is integrally formed with the first shell.

6. The inverter according to claim 1, wherein: The inverter includes a cooling channel. Along the first direction, the cooling channel is arranged between the capacitor and the power module. The cooling channel is integrally formed with the first shell. No heat conductor is provided between the cooling channel and the capacitor. The cooling channel is respectively arranged in contact with the capacitor and the power module on both sides in the first direction.

7. The inverter according to claim 6, characterized in that: The inverter includes a mounting plate. Along the first direction, the power module is arranged on the side of the mounting plate facing away from the capacitor. The first shell includes a plurality of second threaded holes, and the plurality of second threaded holes are arranged at intervals around the cooling channel. The mounting plate includes a plurality of second bolts, and each second bolt corresponds to each second threaded hole one by one.

8. The inverter according to claim 7, characterized in that: Along the first direction, a side of the first housing facing away from the capacitor has an opening, and the mounting plate covers the opening to form the cooling channel.

9. The inverter according to claim 6, wherein: The cooling channel includes a liquid inlet channel and a liquid outlet channel. Along the third direction, the liquid inlet channel and the liquid outlet channel are arranged at intervals on both sides of the power module.

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