Power module

Abstract

The utility model discloses a power module, which comprises a shell, an anode input copper bar and a cathode input copper bar, and is characterized in that the shell comprises a plastic seat; and the positive input copper bar and the negative input copper bar are arranged on the plastic seat side by side. According to the power module provided by the invention, the positive input copper bar and the negative input copper bar are arranged side by side left and right, so that the positive input copper bar and the negative input copper bar independently exist and do not interfere with each other, an additional switching copper bar does not need to be arranged during connection, the welding process is simple, the assembly difficulty is reduced, and meanwhile, the production efficiency is improved. The positive input copper bar and the negative input copper bar which are arranged side by side cannot cause short circuit of the positive electrode and the negative electrode even if the copper bars are welded through during welding, so that the potential safety hazard is reduced, and the reliability of the power module is improved.

Description

Technical Field

[0001] This application relates to the field of semiconductor device technology, and more specifically, to a power module. Background Technology

[0002] As the core components driving the three-phase adapter controller, the IGBT power module and capacitor filter directly affect the performance of the three-phase adapter controller due to the quality of the connection between the output copper busbar of the capacitor filter and the input copper busbar of the IGBT power module. In related technologies, the negative and positive input copper busbars of IGBT power modules are typically stacked and staggered, with the positive input copper busbar protruding relative to the negative input copper busbar. Similarly, the negative and positive output copper busbars of capacitor filters are also stacked and staggered, with the positive output copper busbar protruding relative to the negative output copper busbar. During connection, the positive output copper busbar overlaps the positive input copper busbar. However, due to the insulating barrier between the positive and negative output copper busbars, the negative output copper busbar and negative input copper busbar of the capacitor filter need to be connected and welded together via the negative overlap copper busbar, resulting in a complex welding process and low welding efficiency. On the other hand, when welding the negative input copper busbar, because the negative and positive input copper busbars of the IGBT power module are stacked, if the laser welding energy is too high, it is easy to weld through the negative input copper busbar and the intermediate plastic seat, causing a short circuit between the positive and negative terminals. Utility Model Content

[0003] This application provides a power module to solve at least one of the above-mentioned technical problems.

[0004] The power module of this application includes:

[0005] Housing, the housing including a plastic base;

[0006] A positive input copper busbar and a negative input copper busbar are arranged side by side on the plastic base.

[0007] This application provides a power module in which the positive and negative input copper busbars are arranged side by side, allowing them to exist independently without interference. This eliminates the need for additional adapter busbars during connection, simplifying the soldering process and reducing assembly difficulty. Furthermore, the side-by-side arrangement of the positive and negative input copper busbars ensures that even if the busbars are soldered through, a short circuit will not occur, reducing safety hazards and improving the reliability of the power module.

[0008] In some embodiments, the positive input copper busbar includes a positive input overlap plane, and the negative input copper busbar includes a negative input overlap plane. The positive input overlap plane and the negative input overlap plane face the same direction and have a height difference.

[0009] In this way, a height difference is formed between the positive and negative input copper busbars, which helps to ensure the electrical clearance and creepage distance between the positive and negative input copper busbars.

[0010] In some embodiments, the number of positive input copper busbars and negative input copper busbars is three sets, with the three sets of positive input copper busbars and negative input copper busbars arranged side by side with intervals, and the three positive input copper busbars and three negative input copper busbars arranged alternately.

[0011] In this way, the three input terminals correspond to the three-phase power input respectively, and the alternating arrangement of the positive input copper busbar and the negative input copper busbar makes it easier to achieve insulation and isolation between the copper busbars, thereby reducing the risk of short circuits and electric shock.

[0012] In some embodiments, the positive input copper busbar is provided with a first fixing hole, and the negative input copper busbar is provided with a second fixing hole. The first fixing hole and the second fixing hole are configured such that, when the operating efficiency can be less than a preset value, the positive input copper busbar is connected to the capacitor filter through the first fixing hole, and the negative input copper busbar is connected to the capacitor filter through the second fixing hole.

[0013] Thus, when the input current is small, fixing can be achieved using the first and second fixing holes, which helps to reduce assembly processes and simplify the assembly process.

[0014] In some embodiments, a baffle is provided on the plastic base, the baffle being located between the positive input copper busbar and the negative input copper busbar.

[0015] In this way, setting up a baffle allows the positive input copper busbar and the negative input copper busbar to exist independently and without interference, while also ensuring the electrical clearance and creepage distance between the positive input copper busbar and the negative input copper busbar.

[0016] In some embodiments, a limiting plate is also provided on the plastic base, the limiting plate being located on the side of the positive input copper busbar away from the negative input copper busbar and on the side of the negative input copper busbar away from the positive input copper busbar.

[0017] Thus, the limiting plate can be used to help fix the output copper busbar of the capacitor filter, facilitating the connection between the capacitor filter and the power module.

[0018] In some embodiments, the plastic base is further provided with reinforcing ribs, which are disposed on the surface of the plastic base away from the positive input copper busbar and the negative input copper busbar.

[0019] Therefore, reinforcing ribs are also provided on the bottom surface of the plastic base to improve the structural strength of the plastic base.

[0020] In some embodiments, the power module further includes an output copper busbar disposed on the side of the housing away from the positive input copper busbar and the negative input copper busbar.

[0021] By placing the input and output terminals on opposite sides, the physical distance between them can be increased, thereby improving the level of electrical safety isolation.

[0022] In some embodiments, the output copper busbar is provided with a third fixing hole, which is configured such that when the operating efficiency is less than a preset value, the output copper busbar is connected to the three-phase adapter through the third fixing hole.

[0023] Thus, when the output current is small, the third fixing hole can be used to fix it to the three-phase adapter, which helps to reduce assembly processes and simplify the assembly process.

[0024] In some embodiments, the housing is further provided with a plurality of positioning holes for fixing the housing, the plurality of positioning holes being evenly arranged around the housing.

[0025] In this way, the positioning holes can fix the housing, avoiding problems such as incorrect connection of the input or output end or accidental contact, which could lead to short circuits if the housing moves during assembly and welding.

[0026] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein:

[0028] Figure 1 This is a schematic diagram of the power module according to an embodiment of this application;

[0029] Figure 2 This is a front view of the power module according to an embodiment of this application;

[0030] Figure 3 This is a top view of the power module according to an embodiment of this application;

[0031] Figure 4 This is an assembly diagram of the power module, capacitor filter, and three-phase adapter according to an embodiment of this application;

[0032] Figure 5 This is a top view of a power module according to another embodiment of this application;

[0033] Figure 6This is an assembly diagram of a power module, capacitor filter, and three-phase adapter according to another embodiment of this application;

[0034] Figure 7 This is an assembly diagram of a power module, capacitor filter, and three-phase adapter according to another embodiment of this application.

[0035] Key component symbols: Power module 100, Housing 10, Positioning hole 11, Plastic base 12, First phase plastic base 121, Second phase plastic base 122, Third phase plastic base 123, Baffle 124, Limiting plate 125, Reinforcing rib 126, Positive input copper busbar 20, Positive input overlapping plane 21, First phase positive input copper busbar 22, Second phase positive input copper busbar 23, Third phase positive input copper busbar 24, First fixing hole 25, Negative input copper busbar 30, Negative input overlapping plane 31, First phase negative input copper busbar 32, Second phase negative input copper busbar 33, Third phase negative input copper busbar 34, Second fixing hole 35, Output copper busbar 40, First phase output copper busbar 41, Second phase output copper busbar 42, Third phase output copper busbar 43, Third fixing hole 44, Capacitor filter 200, Positive output copper busbar 210, First phase positive output copper busbar 211, Second phase positive output copper busbar 212, Third phase positive output copper busbar 213, Negative output copper busbar 220, First phase negative output copper busbar 221, Second phase negative output copper busbar 222, Third phase negative output copper busbar 223, Three-phase adapter 300, Adapter copper busbar 310, First phase adapter copper busbar 311, Second phase adapter copper busbar 312, Third phase adapter copper busbar 313. Detailed Implementation

[0036] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. In the description of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] This disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described herein. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0040] As the core components driving the three-phase adapter controller, the IGBT power module and capacitor filter directly affect the performance of the three-phase adapter controller due to the quality of the connection between the output copper busbar of the capacitor filter and the input copper busbar of the IGBT power module. In related technologies, the negative and positive input copper busbars of IGBT power modules are typically stacked and staggered, with the positive input copper busbar protruding relative to the negative input copper busbar. Similarly, the negative and positive output copper busbars of capacitor filters are also stacked and staggered, with the positive output copper busbar protruding relative to the negative output copper busbar. During connection, the positive output copper busbar overlaps the positive input copper busbar. However, due to the insulating barrier between the positive and negative output copper busbars, the negative output copper busbar and negative input copper busbar of the capacitor filter need to be connected and welded together via the negative overlap copper busbar, resulting in a complex welding process and low welding efficiency. On the other hand, when welding the negative input copper busbar, because the negative and positive input copper busbars of the IGBT power module are stacked, if the laser welding energy is too high, it is easy to weld through the negative input copper busbar and the intermediate plastic seat, causing a short circuit between the positive and negative terminals.

[0041] Please see Figure 1 The power module 100 of this application includes a housing 10, a positive input copper busbar 20 and a negative input copper busbar 30. The housing 10 includes a plastic base 12. The positive input copper busbar 20 and the negative input copper busbar 30 are arranged side by side on the plastic base 12.

[0042] This application provides a power module 100, in which the positive input copper busbar 20 and the negative input copper busbar 30 are arranged side by side, so that the positive input copper busbar 20 and the negative input copper busbar 30 exist independently and do not interfere with each other. At the same time, no additional adapter copper busbar is required during connection, simplifying the welding process and reducing assembly difficulty. In addition, the side-by-side arrangement of the positive input copper busbar 20 and the negative input copper busbar 30 means that even if the copper busbar is soldered through, it will not cause a short circuit between the positive and negative terminals, which helps to reduce safety hazards and improve the reliability of the power module 100.

[0043] Specifically, in this embodiment, a plastic base 12 is provided on one side of the housing 10, and the positive input copper busbar 20 and the negative input copper busbar 30 are arranged side by side on the plastic base 12. Furthermore, the housing 10, the plastic base 12, the positive input copper busbar 20 and the negative input copper busbar 30 are an integral structure formed by injection molding.

[0044] Please see Figure 2 In some embodiments, the positive input copper busbar 20 includes a positive input overlap plane 21, and the negative input copper busbar 30 includes a negative input overlap plane 31. The positive input overlap plane 21 and the negative input overlap plane 31 face the same direction and have a height difference.

[0045] In this way, a height difference is formed between the positive input copper busbar 20 and the negative input copper busbar 30, which helps to ensure the electrical clearance and creepage distance between the positive input copper busbar 20 and the negative input copper busbar 30.

[0046] Specifically, in this embodiment, the positive output copper busbar 210 of the capacitor filter 200 is electrically connected to the positive input copper busbar 20 by being connected to the positive input connection plane 21, and the negative output copper busbar 220 of the capacitor filter 200 is electrically connected to the negative input copper busbar 30 by being connected to the negative input connection plane 31.

[0047] Furthermore, both the positive input contact plane 21 and the negative input contact plane 31 face upwards and have a height difference. That is, the positive input copper busbar 20 and the negative input copper busbar 30 are arranged in a staggered manner, thus ensuring the electrical clearance and creepage distance between the positive input copper busbar 20 and the negative input copper busbar 30. In this embodiment, the height of the positive input copper busbar 20 is slightly higher than the height of the negative input copper busbar 30.

[0048] Please see Figure 2 and Figure 3 In some embodiments, there are three sets of positive input copper busbars 20 and negative input copper busbars 30, with the three sets of positive input copper busbars 20 and negative input copper busbars 30 arranged side by side with intervals, and the three positive input copper busbars 20 and three negative input copper busbars 30 arranged alternately.

[0049] In this way, the three input terminals correspond to the three-phase power input respectively, and the alternating arrangement of the positive input copper busbar 20 and the negative input copper busbar 30 makes it easier to achieve insulation and isolation between the copper busbars, thereby reducing the risk of short circuits and electric shock.

[0050] Specifically, in this embodiment, the housing 10 has three plastic seats 12 on one side: a first-phase plastic seat 121, a second-phase plastic seat 122, and a third-phase plastic seat 123. Similarly, the positive input copper busbar 20 and the negative input copper busbar 30 are also arranged in three sets: a first-phase positive input copper busbar 22, a first-phase negative input copper busbar 32, a second-phase positive input copper busbar 23, a second-phase negative input copper busbar 33, a third-phase positive input copper busbar 24, and a third-phase negative input copper busbar 34. The first-phase positive input copper busbar 22 and the first-phase negative input copper busbar 32 are located within the first-phase plastic seat 121; the second-phase positive input copper busbar 23 and the second-phase negative input copper busbar 33 are located within the second-phase plastic seat 122; and the third-phase positive input copper busbar 24 and the third-phase negative input copper busbar 34 are located within the third-phase plastic seat 123.

[0051] Furthermore, the positions of the positive input copper busbar 20 and the negative input copper busbar 30 in each group are arranged in a staggered manner, both horizontally and vertically, to ensure that the positive input copper busbar 20 and the negative input copper busbar 30 do not interfere with each other during laser welding, and to avoid short circuits caused by excessive laser welding energy leading to the positive input copper busbar 20 and the negative input copper busbar 30 being welded through.

[0052] Please see Figure 4 In this embodiment of the application, the positive input copper busbar 20 and the negative input copper busbar 30 of the power module 100 are used to connect to the capacitor filter 200. The capacitor filter 200 includes a positive output copper busbar 210 and a negative output copper busbar 220. The positive output copper busbar 210 includes a first-phase positive output copper busbar 211, a second-phase positive output copper busbar 212 and a third-phase positive output copper busbar 213. The negative output copper busbar 220 includes a first-phase negative output copper busbar 221, a second-phase negative output copper busbar 222 and a third-phase negative output copper busbar 223. Correspondingly, the aforementioned output copper busbars are respectively connected to the first phase positive input copper busbar 22, the second phase positive input copper busbar 23, the third phase positive input copper busbar 24, the first phase negative input copper busbar 32, the second phase negative input copper busbar 33, and the third phase negative input copper busbar 34 of the power module 100. The corresponding copper busbar surfaces are tightly fitted together, and the output copper busbars on the capacitor filter 200 do not interfere with the housing 10 of the power module 100.

[0053] Please see Figure 5 and Figure 6 In some embodiments, the positive input copper busbar 20 is provided with a first fixing hole 25, and the negative input copper busbar 30 is provided with a second fixing hole 35. The first fixing hole 25 and the second fixing hole 35 are configured such that when the operating power can be less than a preset value, the positive input copper busbar 20 is connected to the capacitor filter 200 through the first fixing hole 25, and the negative input copper busbar 30 is connected to the capacitor filter 200 through the second fixing hole 35.

[0054] Thus, when the input current is small, fixing can be achieved using the first fixing hole 25 and the second fixing hole 35, which helps to reduce assembly processes and simplify the assembly process.

[0055] Specifically, depending on different assembly requirements and scenarios, the connection method between the power module 100 and the capacitor filter 200 can be selected between bolts and nuts and laser welding.

[0056] In this embodiment, the power module 100, while maintaining the same package, has two methods for fixing the input copper busbars. In this embodiment, the positive input copper busbar 20 is provided with a first fixing hole 25, and the negative input copper busbar 30 is provided with a second fixing hole 35, so that the output copper busbar of the power module 100 can be fixed to the copper busbar of the capacitor filter 200 by means of bolts and nuts.

[0057] In this embodiment, when the operating power of the power module 100 is less than a preset value, while keeping the IGBT power module 100 in the same package, holes can be punched in the positive input copper busbar 20 and the negative input copper busbar 30. Bolts and nuts passing through the first fixing hole 25 and the second fixing hole 35 ensure a tight fit between the input copper busbar of the power module 100 and the output copper busbar of the capacitor filter 200. In this embodiment, the preset value is 98%, meaning that punching holes in the positive input copper busbar 20 and the negative input copper busbar 30 is permissible when the operating power does not need to exceed 98%.

[0058] When the operating power of the power module 100 needs to be greater than or equal to the preset value, a laser device is used to simultaneously laser weld and fix the positive input copper busbar 20 and the negative input copper busbar 30 of the power module 100 to the output copper busbar of the capacitor filter 200.

[0059] Please see Figure 2 In some embodiments, a baffle 124 is provided on the plastic base 12, and the baffle 124 is located between the positive input copper busbar 20 and the negative input copper busbar 30.

[0060] Thus, by setting up the baffle 124, the positive input copper busbar 20 and the negative input copper busbar 30 can exist independently and without interference, while also ensuring the electrical clearance and creepage distance between the positive input copper busbar 20 and the negative input copper busbar 30.

[0061] Specifically, in the embodiment of this application, a baffle 124 is formed in the middle of the plastic base 12, and the positive input copper busbar 20 and the negative input copper busbar 30 are respectively disposed on both sides of the baffle 124. Furthermore, a baffle 124 is provided in the middle of the plastic base 12 of each phase to ensure the electrical clearance and creepage distance between the positive input copper busbar 20 and the negative input copper busbar 30 of each phase.

[0062] In some embodiments, a limiting plate 125 is also provided on the plastic base 12, the limiting plate 125 being located on the side of the positive input copper busbar 20 away from the negative input copper busbar 30 and on the side of the negative input copper busbar 30 away from the positive input copper busbar 20.

[0063] Thus, the limiting plate 125 can be used to help fix the output copper busbar of the capacitor filter 200, facilitating the connection between the capacitor filter 200 and the power module 100.

[0064] Specifically, in this embodiment, the plastic base 12 is provided with limiting plates 125 on both sides. The limiting plates 125 on both sides and the baffle 124 in the middle form two parallel receiving grooves on the left and right. The two receiving grooves are used to set the positive input copper busbar 20 and the negative input copper busbar 30, respectively.

[0065] Furthermore, the limiting plate 125 extends upward and beyond the top surfaces of the positive input copper busbar 20 and the negative input copper busbar 30. Thus, during installation and use, if accidental contact occurs, the limiting plate 125 can play a certain blocking role, thereby reducing the probability of accidental contact and short circuit.

[0066] In some embodiments, the plastic base 12 is further provided with reinforcing ribs 126, which are disposed on the surface of the plastic base 12 away from the positive input copper busbar 20 and the negative input copper busbar 30.

[0067] Thus, the addition of reinforcing ribs 126 on the bottom surface of the plastic base 12 helps to improve the structural strength of the plastic base 12.

[0068] Specifically, in this embodiment, the bottom surface of the plastic base 12 is provided with a reinforcing rib 126, one side of the reinforcing rib 126 is connected to the bottom surface of the plastic base 12, and the end face is connected to the housing 10.

[0069] Furthermore, there are multiple reinforcing ribs 126, which are arranged along the length of the plastic base 12, with adjacent reinforcing ribs 126 spaced apart.

[0070] Please see Figure 1 and Figure 3 In some embodiments, the power module 100 further includes an output copper busbar 40, which is disposed on the side of the housing 10 away from the positive input copper busbar 20 and the negative input copper busbar 30.

[0071] By placing the input and output terminals on opposite sides, the physical distance between them can be increased, thereby improving the level of electrical safety isolation.

[0072] Specifically, the positive input copper busbar 20, the negative input copper busbar 30, and the input copper busbar are located on opposite sides of the housing 10, respectively, and do not interfere with each other. In this embodiment, the output copper busbar 40 includes a first-phase output copper busbar 41, a second-phase output copper busbar 42, and a third-phase output copper busbar 43, which are located on the side of the housing 10 away from the positive input copper busbar 20 and the negative input copper busbar 30.

[0073] Please see Figure 4In this embodiment, the output copper busbar 40 of the power module 100 is used to connect to the three-phase adapter 300. The three-phase adapter 300 is an electrical conversion device used to convert three-phase power into a power interface suitable for specific devices, that is, to connect devices that use three-phase power. The three-phase adapter 300 includes an adapter copper busbar 310, which includes a first-phase adapter copper busbar 311, a second-phase adapter copper busbar 312, and a third-phase adapter copper busbar 313. The first-phase adapter copper busbar 311, the second-phase adapter copper busbar 312, and the third-phase adapter copper busbar 313 are respectively connected to the first-phase output copper busbar 41, the second-phase output copper busbar 42, and the third-phase output copper busbar 43 to realize the electrical connection between the power module 100 and the three-phase adapter 300.

[0074] Please see Figure 7 Furthermore, the order in which the output copper busbar 40 on the power module 100 and the adapter copper busbar 310 of the three-phase adapter 300 are connected can be changed.

[0075] In this embodiment, when the power module 100, capacitor filter 200, and three-phase adapter 300 are connected, the power module 100 is first assembled and fixed on the positioning device while maintaining the same package to avoid displacement. Then, the capacitor filter 200 and the three-phase adapter 300 are simultaneously assembled and fixed on the positioning device, so that the positive output copper busbar 210 and negative output copper busbar 220 of the capacitor filter 200 and the adapter copper busbar 310 of the three-phase adapter 300 are simultaneously overlapped on the positive input copper busbar 20, negative input copper busbar 30, and output copper busbar 40 of the power module 100, respectively, ensuring that the copper busbars are tightly fitted. Then, two laser devices are used to simultaneously perform laser welding to fix the copper busbars overlapped on both sides of the power module 100. Simultaneous laser welding effectively reduces the impact of welding at one end on welding at the other end, improves the laser welding effect, ensures the tightness of the copper busbars at the input and output ends of the IGBT power module 100, reduces the contact resistance between the copper busbars, and improves the current carrying capacity of the input and output copper busbars.

[0076] In this embodiment, the housing 10 is injection molded to integrally encapsulate the first-phase positive input copper busbar 22, the first-phase negative input copper busbar 32, the second-phase positive input copper busbar 23, the second-phase negative input copper busbar 33, the third-phase positive input copper busbar 24, the third-phase negative input copper busbar 34, the first-phase output copper busbar 41, the second-phase output copper busbar 42, and the third-phase output copper busbar 43.

[0077] Please see Figure 6 In some embodiments, the output copper busbar 40 is provided with a third fixing hole 41. The third fixing hole 41 is configured such that when the operating efficiency is less than a preset value, the output copper busbar 40 is connected to the three-phase adapter 300 through the third fixing hole 41.

[0078] Thus, when the output current is small, the third fixing hole 41 is used to fix it to the three-phase adapter 300, which helps to reduce the assembly process and simplify the assembly process.

[0079] Specifically, while maintaining the same package, the power module 100 has two methods for fixing the output copper busbar 40. In this embodiment, the output copper busbar 40 may also have a third fixing hole 41. Furthermore, the first phase output copper busbar 41, the second phase output copper busbar 42, and the third phase output copper busbar 43 are each provided with a third fixing hole 41, so that the output copper busbar 40 of the power module 100 can be fixed by bolts and nuts.

[0080] In this embodiment, when the operating efficiency of the power module 100 is less than a preset value or when a lower contact impedance requirement is not required, while keeping the IGBT power module 100 in the same package, the output copper busbar 40 can be punched, and the output copper busbar 40 of the power module 100 can be tightly fitted to the input copper busbar of the three-phase adapter 300 by bolting and nut through the third fixing hole 41.

[0081] When the operating efficiency of the power module 100 is greater than or equal to the preset value, a laser device is used to simultaneously laser weld and fix the output copper busbar 40 of the power module 100 and the input copper busbar of the three-phase adapter 300.

[0082] In some embodiments, the power module 100 may have one input copper busbar or one output copper busbar 40 with a hole drilled and the other without a hole drilled. After the power module 100, along with the capacitor filter 200, are completely fixed to the positioning device by bolts, the copper busbar on the side with the hole drilled is fixed first by bolts and corresponding nuts. Then, the copper busbar on the side without a hole is welded by laser welding equipment to complete the assembly and fixation of the three components.

[0083] In some embodiments, the housing 10 is further provided with a plurality of positioning holes 11 for fixing the housing 10, and the plurality of positioning holes 11 are evenly arranged around the housing 10.

[0084] In this way, the positioning hole 11 can fix the housing 10, avoiding the problem of the housing 10 moving during assembly and welding, which could lead to incorrect connection of the input or output end or accidental contact, resulting in short circuits.

[0085] Specifically, in this embodiment, the positioning hole 11 is used to connect with the positioning device, so as to prevent the power module 100 from shifting during the assembly process when the power module 100, capacitor filter 200 and three-phase adapter 300 are connected, thereby causing installation errors or safety hazards.

[0086] Furthermore, there are eight positioning holes 11, which are evenly distributed around the edge of the housing 10.

[0087] In the description of this specification, the references to "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" refer to specific features, structures, materials, or characteristics described in connection with the described embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0088] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the stated features. In the description of this application, "multiple" means at least two, such as two or three, unless otherwise explicitly specified.

[0089] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A power module, characterized in that, include: Housing, the housing including a plastic base; A positive input copper busbar and a negative input copper busbar are arranged side by side on the plastic base.

2. The power module according to claim 1, characterized in that, The positive input copper busbar includes a positive input overlap plane, and the negative input copper busbar includes a negative input overlap plane. The positive input overlap plane and the negative input overlap plane have the same orientation and a height difference.

3. The power module according to claim 1, characterized in that, The number of positive input copper busbars and negative input copper busbars is three sets, with the three sets of positive input copper busbars and negative input copper busbars arranged side by side with intervals, and the three positive input copper busbars and three negative input copper busbars arranged alternately.

4. The power module according to claim 1, characterized in that, The positive input copper busbar is provided with a first fixing hole, and the negative input copper busbar is provided with a second fixing hole. The first fixing hole and the second fixing hole are configured such that when the operating efficiency can be less than a preset value, the positive input copper busbar is connected to the capacitor filter through the first fixing hole, and the negative input copper busbar is connected to the capacitor filter through the second fixing hole.

5. The power module according to claim 1, characterized in that, A baffle is provided on the plastic base, and the baffle is located between the positive input copper busbar and the negative input copper busbar.

6. The power module according to claim 1, characterized in that, The plastic base is also provided with a limiting plate, which is located on the side of the positive input copper busbar away from the negative input copper busbar and on the side of the negative input copper busbar away from the positive input copper busbar.

7. The power module according to claim 1, characterized in that, The plastic base is also provided with reinforcing ribs, which are disposed on the surface of the plastic base away from the positive input copper busbar and the negative input copper busbar.

8. The power module according to claim 1, characterized in that, The power module also includes an output copper busbar, which is disposed on the side of the housing away from the positive input copper busbar and the negative input copper busbar.

9. The power module according to claim 8, characterized in that, The output copper busbar is provided with a third fixing hole, which is configured such that when the operating efficiency is less than a preset value, the output copper busbar is connected to the three-phase adapter through the third fixing hole.

10. The power module according to claim 1, characterized in that, The housing is also provided with a plurality of positioning holes for fixing the housing, and the plurality of positioning holes are evenly arranged around the housing.

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