Power module, power module group, inverter, electric assembly and vehicle

Abstract

The utility model relates to a power module, a power module group, an inverter, an electric assembly and a vehicle. The power module comprises a housing and a power unit. The power unit is arranged in the shell; the shell is provided with at least one splicing unit, and the splicing unit of one power module can be detachably connected with the splicing unit of the other power module. A plurality of power modules can be connected together to form a power module, each power module corresponds to one phase of the power module, and at the moment, the power module is a multi-phase power module. When a certain phase has a fault and needs to be overhauled, only the shell of the power module corresponding to the phase needs to be opened, so that the operation is simple; when a certain phase is damaged, only the power module corresponding to the phase needs to be replaced, and the whole multi-phase power module does not need to be replaced, so that the maintenance cost can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of power semiconductors and relates to a power module, a power module group, an inverter, an electric assembly and a vehicle. Background Art

[0002] In the related art, a multi-phase power module includes a housing and multiple power units, each of which is installed in the housing. When working, multi-phase power can be output to the outside through the multiple power units, wherein each power unit outputs one-phase power to the outside.

[0003] However, when a phase of a multi-phase power module fails and needs to be repaired, the entire casing needs to be opened, which is troublesome to operate. Moreover, when a certain phase of the multi-phase power module is damaged, the multi-phase power module needs to be replaced as a whole, which leads to high maintenance costs. Utility Model Content

[0004] In view of the problems of complicated maintenance operation and high maintenance cost of multi-phase power modules in the related art, the utility model provides a power module, a power module, an inverter, an electric assembly and a vehicle.

[0005] In order to solve the above technical problems, on the one hand, an embodiment of the utility model provides a power module, including a shell and a power unit; the power unit is arranged in the shell; at least one splicing unit is provided on the shell, and the splicing unit includes a first connecting structure and a second connecting structure; the splicing unit of one power module can be detachably connected to the splicing unit of another power module.

[0006] Optionally, the splicing unit includes a first connection structure and a second connection structure, and the first connection structure of one power module can be detachably connected to the second connection structure of another power module.

[0007] Optionally, the first connection structure and the second connection structure included in one of the splicing units are respectively arranged on two opposite sides of the shell.

[0008] Optionally, the first connection structure and the second connection structure included in one of the splicing units are respectively arranged on two sides in the width direction of the shell;

[0009] The first connection structure is a clamping block, the second connection structure is a clamping slot, and the first connection structure is suitable for clamping with the second connection structure.

[0010] Optionally, the card slot extends along the length direction of the shell and penetrates at least one end face of the shell in the length direction; in the depth direction of the card slot, along the direction from the opening of the card slot to the bottom surface of the card slot, the size of the card slot gradually increases, and the size of the card block gradually increases accordingly.

[0011] Optionally, there are multiple splicing units; in the thickness direction of the shell, the first connection structures of each splicing unit are arranged in sequence and at intervals, and the second connection structures of each splicing unit are arranged in sequence and at intervals; the first connection structure and the second connection structure included in one splicing unit are respectively arranged on both sides in the width direction of the shell; each first connection structure on one power module can be connected or separated at the same time with each second connection structure on another power module.

[0012] Optionally, the shell includes a main body and a heat sink; in the thickness direction of the shell, the main body has a first end face and a second end face arranged opposite to each other, and a accommodating cavity is provided on the main body, and the accommodating cavity passes through the first end face and the second end face; the heat sink is connected to the main body; the power unit is arranged on the heat sink and is located in the accommodating cavity.

[0013] Optionally, the splicing unit is provided on the main body; and / or the splicing unit is provided on the heat dissipation plate.

[0014] Optionally, the heat dissipation plate is connected to the first end surface and closes an opening of the accommodating cavity formed on the first end surface.

[0015] Optionally, the housing further includes a cover connected to the body; in the thickness direction of the housing, the power unit is located between the cover and the heat sink.

[0016] Optionally, the cover and the heat dissipation plate respectively seal two ends of the accommodating cavity.

[0017] Optionally, the sealing cover is located in the accommodating cavity.

[0018] Optionally, a clamping structure is provided on the body, and the clamping structure is used to clamp the cover to the body.

[0019] Optionally, an avoidance structure is provided on the inner surface of the accommodating cavity and / or the cover; the signal terminal of the power unit can protrude from the avoidance structure to the surface of the cover facing away from the heat sink.

[0020] Optionally, the heat sink includes a plate body and a plurality of heat sink fins; one of two end faces of the plate body that are opposite to each other is connected to the body, and the other end face is connected to the heat sink fins.

[0021] Optionally, the heat sink has a first connection area and a second connection area, the first connection area is used to connect to the body, and the second connection area is used to connect to the power unit; a solder resist structure is provided between the first connection area and the second connection area.

[0022] Optionally, the housing has a accommodating cavity, the power unit is arranged in the accommodating cavity, and a through hole is provided on the cavity wall of the accommodating cavity; the power module also includes a pin, and the pin passes through the through hole to be connected to the terminal of the power unit.

[0023] In order to solve the above technical problems, on the other hand, an embodiment of the utility model further provides a power module, comprising a plurality of power modules as described in any one of the above items.

[0024] Optionally, the power module further includes a cooling module having a fluid channel; each of the power modules is connected to the cooling module.

[0025] Optionally, a housing of the fluid channel is provided with an avoidance window; the power module extends into the fluid channel through the avoidance window, and the power module closes the avoidance window.

[0026] In order to solve the above technical problems, on the other hand, an embodiment of the utility model further provides an inverter, comprising any one of the power modules described above.

[0027] In order to solve the above technical problems, on the other hand, an embodiment of the utility model further provides an electric assembly, including a controller and any one of the power modules described above, wherein the controller is electrically connected to the power module.

[0028] In order to solve the above technical problems, on the other hand, an embodiment of the utility model further provides a vehicle, comprising any one of the power modules described above.

[0029] In the power module, power module, inverter, electric assembly and vehicle provided by the embodiment of the utility model, multiple power modules can be connected together to form a power module, and each power module corresponds to a phase of the power module. In this case, the power module is a multi-phase power module. When a phase fails and needs to be repaired, it is only necessary to open the housing of the power module corresponding to the phase, which is simple to operate; when one of the phases is damaged, it is only necessary to replace the power module corresponding to the phase, without replacing the multi-phase power module as a whole, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of a power module provided by an embodiment of the utility model;

[0031] Figure 2 It is a schematic diagram of the internal structure of a power module provided by an embodiment of the utility model;

[0032] Figure 3 The structure of the power module provided by one embodiment of the present invention is schematically shown. Figure 1 ;

[0033] Figure 4 yes Figure 3 A magnified image of area A;

[0034] Figure 5 The structure of the power module provided by one embodiment of the present invention is schematically shown. Figure 2 ;

[0035] Figure 6 yes Figure 5 Enlarged view of area B;

[0036] Figure 7 The structure of the heat sink of the power module provided by one embodiment of the utility model is schematically shown. Figure 1 ;

[0037] Figure 8 The structure of the heat sink of the power module provided by one embodiment of the utility model is schematically shown. Figure 2 ;

[0038] Fig. 9 yes Figure 8 Enlarged view of the middle C area;

[0039] Fig.10 The structure of the heat sink of the power module provided by one embodiment of the utility model is schematically shown. Figure 3 ;

[0040] Fig.11 yes Fig.10 Enlarged view of area D in the middle;

[0041] Fig.12 This is a schematic diagram of the structure of a power module provided by an embodiment of the utility model Figure 1 ;

[0042] Fig.13 It is a schematic diagram of the cooperation between the power module and the cooling module provided by one embodiment of the utility model;

[0043] Fig.14 This is a schematic diagram of a power module provided by an embodiment of the utility model Figure 2 ;

[0044] Fig.15 It is a structural schematic diagram of a cooling module provided in one embodiment of the utility model.

[0045] The reference numerals in the specification are as follows:

[0046] 10. Power module;

[0047] 1. Shell; 11. First surface; 12. Second surface; 13. Main body; 131. First end face; 132. Second end face; 133. Accommodating cavity; 134. First connecting hole; 135. First side face; 136. Second side face; 137. First hole; 138. Second hole; 14. Heat sink; 141. Second connecting hole; 142. Plate body; 143. Heat sink; 144. First connecting area; 145. Second connecting area; 146. Solder resist structure; 147. Third side face; 148. Fourth side face; 15. Cover; 16. Support structure; 161. Groove; 17. Pressing structure; 171. Column; 172. Pressing block; 18. Avoiding structure; 19. First reinforcing block; 1a. Second reinforcing block; 1b. Positioning column;

[0048] 2. Power unit; 21. Signal terminal; 22. AC terminal; 23. DC terminal;

[0049] 3. Splicing unit; 31. First connection structure; 32. Second connection structure;

[0050] 4. AC pin;

[0051] 5. DC pin;

[0052] 6. Card connection structure;

[0053] 20. Cooling module;

[0054] 7. Fluid channel;

[0055] 8. Avoid windows;

[0056] 100. Power module. DETAILED DESCRIPTION

[0057] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0058] like Figures 1 to 5As shown, in one embodiment, the power module 10 is characterized in that it includes a housing 1 and a power unit 2; the power unit 2 is arranged in the housing 1; at least one splicing unit 3 is provided on the housing 1, and the splicing unit 3 of one power module 10 can be detachably connected to the splicing unit 3 of another power module 10.

[0059] In this embodiment, a plurality of power modules 10 can be connected together to form a power module 100 (see Fig.12 ), each power module 10 corresponds to a phase of the power module 100, and in this case, the power module 100 is a multi-phase power module. When a phase fails and needs to be repaired, it is only necessary to open the housing of the power module 10 corresponding to the phase, which is simple to operate; when one of the phases is damaged, it is only necessary to replace the power module 10 corresponding to the phase, without having to replace the multi-phase power module as a whole, thereby reducing maintenance costs.

[0060] like Figures 1 to 5 As shown, in one embodiment, the splicing unit 3 includes a first connecting structure 31 and a second connecting structure 32; the first connecting structure 31 of one power module 10 can be connected or separated from the second connecting structure 32 of another power module 10, so that the housing 1 of one power module 10 can be detachably connected to the housing 1 of another power module 10.

[0061] Specifically, when the first connection structure 31 of a power module 10 is connected to the second connection structure 32 of another power module 10, the two power modules 10 are connected together to form a two-phase power module; when the first connection structure 31 of a power module 10 is separated from the second connection structure 32 of another power module 10, the two power modules 10 can be separated.

[0062] For the multi-phase power module 100, the first connection structure 31 of one of two adjacent power modules 10 is connected to the second connection structure 32 of the other. For example, three power modules 10 can be connected together to form a three-phase power module. "Multiple" means greater than or equal to two, and the word "multiple" has the same meaning in each embodiment and will not be repeated in the following text.

[0063] Typically, a splicing unit 3 includes a first connection structure 31 and a second connection structure 32 .

[0064] The power unit 2 can convert direct current into alternating current, or the power unit 2 can also convert alternating current into direct current.

[0065] In one embodiment, the housing 1 has a containing space, and the power unit 2 is disposed in the containing space, thereby achieving that the power unit 2 is disposed in the housing 1 .

[0066] like Figure 3 and Figure 5 As shown, in one embodiment, a splicing unit 3 includes a first connection structure 31 and a second connection structure 32 which are respectively arranged on opposite sides of the housing 1, so that after a plurality of power modules 10 are connected to form a multi-phase power module 100, each power module 10 is arranged in sequence along a direction, which can make the multi-phase power module 100 more tidy, and at the same time, it is also convenient to connect the multi-phase power module 100 with devices such as the cooling module 20.

[0067] In one embodiment, in the width direction of the housing 1, the first connection structure 31 and the second connection structure 32 included in one splicing unit 3 are respectively arranged on opposite sides of the housing 1. After multiple power modules 10 are connected together, each power module 10 is arranged in sequence along the width direction of the housing 1.

[0068] When a plurality of splicing units 3 are provided on the housing 1, the first connection structure 31 and the second connection structure 32 included in each splicing unit 3 are both located on both sides of the housing 1 in the same direction, for example, the first connection structure 31 and the second connection structure 32 included in each splicing unit 3 are both located on both sides of the width direction of the housing 1. In addition, the first connection structure 31 included in each splicing unit 3 is all located on the same side of the housing 1, and in this case, the second connection structure 32 included in each splicing unit 3 is also all located on the same side of the housing 1; or, there may also be a situation where the first connection structure 31 of one splicing unit 3 and the second connection structure 32 of another splicing unit 3 are located on the same side of the housing 1.

[0069] exist Figure 1 In the embodiment, the width direction of the housing 1 is parallel to the X-axis.

[0070] like Figure 4 and Figure 6 As shown, in one embodiment, the number of splicing units 3 is multiple; in the thickness direction of the shell 1, the first connection structures 31 of each splicing unit 3 are arranged in sequence, and the second connection structures 32 of each splicing unit 3 are arranged in sequence; the first connection structure 31 and the second connection structure 32 included in a splicing unit 3 are respectively arranged on both sides in the width direction of the shell 1; when in use, each first connection structure 31 on a power module 10 can be connected or separated at the same time with each second connection structure 32 on another power module 10.

[0071] exist Figure 1 In the embodiment, the thickness direction of the housing 1 is parallel to the Z axis.

[0072] Among them, the first connection structures 31 on a power module 10 can be connected or separated simultaneously with the second connection structures 32 on another power module 10, which means that: when a first connection structure 31 on the first power module 10 is connected to a second connection structure 32 on the second power module 10, the other first connection structures 31 on the first power module 10 can be connected to the other second connection structures 32 on the second power module 10 respectively; when a first connection structure 31 on the first power module 10 is separated from a second connection structure 32 on the second power module 10, the other first connection structures 31 on the first power module 10 can be separated from the other second connection structures 32 on the second power module 10 respectively.

[0073] like Figure 4 and Figure 6 As shown, in one embodiment, the first connection structure 31 is suitable for being snap-fitted with the second connection structure 32, wherein the first connection structure 31 is a snap-fit ​​block, and the second connection structure 32 is a snap-fit ​​slot, and the snap-fit ​​block can be placed in the snap-fit ​​slot to achieve snap-fit ​​connection between the first connection structure 31 and the second connection structure 32. In addition, after the snap-fit ​​block is placed in the snap-fit ​​slot, it can also be removed from the snap-fit ​​slot to achieve separation of the first connection structure 31 and the second connection structure 32. When it is necessary to assemble the multi-phase power module 100, multiple power modules 10 can be snap-fitted together in sequence.

[0074] exist Figure 1 In the embodiment, the length direction of the housing 1 is parallel to the Y axis. In addition, the X axis, the Y axis and the Z axis are perpendicular to each other.

[0075] like Figure 6 As shown, in one embodiment, the card slot extends along the length direction of the shell 1 and penetrates at least one end surface of the shell 1 in the length direction. In addition, in the depth direction of the card slot, along the direction from the opening of the card slot to the bottom surface of the card slot, the size of the card slot gradually increases, and the size of the card block gradually increases accordingly. When the card block is placed in the card slot, it can be prevented that the card block moves out of the card slot along the depth direction of the card slot, so that the two power modules 10 can be connected more firmly. Among them, the size of the card slot mentioned here refers to the width size of the card slot, and the size of the card block mentioned here refers to the width size of the card block, wherein the width direction of the card block is parallel to the width direction of the card slot. "The size of the card block gradually increases accordingly" means that in the depth direction of the card slot, along the direction from the opening of the card slot to the bottom surface of the card slot, the width size of the card block gradually increases.

[0076] The length direction of the housing 1 may be the length direction of the card slot, and the depth direction of the card slot and the length direction of the card slot may be perpendicular to each other. When the card slot and the card block are respectively arranged on both sides of the width direction of the housing 1, the depth direction of the card slot is the width direction of the housing 1, and the width direction of the card slot is the thickness direction of the housing 1. For example, in the width direction of the housing 1, the housing 1 has a first surface 11 and a second surface 12 arranged opposite to each other, the card slot is arranged on the first surface 11, and the card block is arranged on the second surface 12.

[0077] Assuming that the card slot penetrates along the length direction of the shell 1 to the end face a of the shell 1, the card slot forms an opening on the end face a. When assembling two power modules 10, the card block of the first power module 10 can be inserted into the card slot of the second power module 10 from the end face a of the second power module 10 along the length direction of the shell 1.

[0078] When two connected power modules 10 need to be separated, force can be applied to one (or two) power modules 10 along the length direction of the housing 1 to move the card block of the first power module 10 out of the card slot of the second power module 10 from the end surface a.

[0079] When two power modules 10 are connected together, the length directions of their housings 1 are in the same direction.

[0080] In addition, as a preference, in the length direction of the housing 1 , the card slot may penetrate the housing 1 , that is, the card slot penetrates both end surfaces of the housing 1 in the length direction.

[0081] In one embodiment, the clamping slot may be a trapezoidal slot, and the clamping block may be a trapezoidal block.

[0082] like Figures 1 to 3 As shown, in one embodiment, the housing 1 includes a body 13 and a heat sink 14; in the thickness direction of the housing 1, the body 13 has a first end face 131 and a second end face 132 arranged opposite to each other, and a receiving cavity 133 is provided on the body 13, and the receiving cavity 133 passes through the first end face 131 and the second end face 132; that is, the receiving cavity 133 passes through the body 13 along the thickness direction of the body 13; the heat sink 14 is connected to the body 13; the power unit 2 is arranged on the heat sink 14 and is located in the receiving cavity 133. Such an arrangement is more conducive to the heat dissipation of the power unit 2, thereby improving the working performance of the power module 10.

[0083] The thickness direction of the body 13 is the thickness direction of the shell 1 , the width direction of the body 13 is the width direction of the shell 1 , and the length direction of the body 13 is the length direction of the shell 1 .

[0084] The heat sink 14 may be an opening at one end of the closed accommodating cavity 133. For example, in one embodiment, the heat sink 14 is connected to the first end surface 131 and closes the opening formed on the first end surface 131 of the accommodating cavity 133, wherein the opening formed on the first end surface 131 of the accommodating cavity 133 is defined as the first opening.

[0085] The opening formed on the first end surface 131 of the heat sink 14 enclosing the accommodating cavity 133 may mean that in the orthographic projection on the surface of the heat sink 14 close to the body 13 (the surface may be a plane), the orthographic projection of the first opening is completely located on the surface of the heat sink 14 close to the body 13 .

[0086] The body 13 and the heat sink 14 may be connected together by bolts or the like. Figure 3 and Figure 7 As shown, the body 13 is provided with a first connection hole 134, and the heat sink 14 is provided with a second connection hole 141. Specifically: the second connection hole 141 penetrates the heat sink 14 along the Z-axis direction, and the first connection hole 134 penetrates the body 13 along the Z-axis direction. The bolt passes through the heat sink 14 from the second connection hole 141, and passes through the body 13 from the first connection hole 134, and then cooperates with the nut to lock the heat sink 14 and the body 13 together; or, wherein the second connection hole 141 penetrates the heat sink 14 along the Z-axis direction, and the first connection hole 134 is a threaded hole set on the first end face 131, and the bolt passes through the heat sink 14 from the second connection hole 141 and then cooperates with the first connection hole 134, so that the heat sink 14 and the body 13 can be locked together.

[0087] During assembly, the first connection hole 134 and the second connection hole 141 can also serve as limiting holes. In this case, the bolts used to connect the heat sink 14 and the body 13 can serve as limiting columns to limit the relative position of the heat sink 14 and the body 13. In addition, the first connection hole 134 and the second connection hole 141 can be provided in plurality.

[0088] like Figure 3 As shown, in one embodiment, the body 13 may be a rectangular parallelepiped structure, and the accommodating cavity 133 may be a square hole.

[0089] like Figure 7 As shown in FIG. 1 and FIG. 2 , in one embodiment, the heat sink 14 includes a plate body 142 and a plurality of heat sink fins 143; the plate body 142 has two opposite end faces, one of which is connected to the body 13, and the other is connected to the heat sink fins 143, that is, the heat sink fins 143 are arranged on the end face of the plate body 142 away from the body 13. The end face of the plate body 142 used for connecting to the body 13 is the surface of the heat sink 14 close to the body 13. In addition, the two end faces of the plate body 142 mentioned above refer to the two opposite end faces of the plate body 142 in the thickness direction of the housing 1.

[0090] The plate body 142 is a flat plate structure, and its surface for connecting to the body 13 and its surface for connecting to the heat dissipation fins 143 are both flat surfaces.

[0091] In addition, the heat dissipation fins 143 are cylindrical structures, and a plurality of heat dissipation fins 143 may be arranged in an array on the plate body 142 .

[0092] like Figure 8 As shown, in one embodiment, the heat sink 14 has a first connection area 144 and a second connection area 145, the first connection area 144 is used to connect to the body 13, and the second connection area 145 is used to connect to the power unit 2; a solder resist structure 146 is provided between the first connection area 144 and the second connection area 145 to prevent the fusion liquid of the second connection area 145 from flowing to the first connection area 144.

[0093] During assembly, the power unit 2 is welded to the heat sink 14 . During welding, a welding liquid is generated. After the welding liquid cools, a welding seam structure is formed. The welding seam structure can connect the power unit 2 and the heat sink 14 together.

[0094] The solder resist structure 146 can block the welding liquid to prevent the welding liquid from flowing to the first connection area 144 , thereby avoiding interference with the connection between the heat dissipation plate 14 and the body 13 .

[0095] The solder resist structure 146 may be a concave structure or a convex structure.

[0096] like Figure 7 and Figure 8 As described above, the first connection area 144 , the second connection area 145 and the solder resist structure 146 are all located on the surface of the board 142 away from the heat dissipation fins 143 , and the first connection area 144 and the solder resist structure 146 are both surrounded by the outside of the second connection area 145 , and the first connection area 144 is surrounded by the outside of the solder resist structure 146 .

[0097] like Figures 3 to 6 , as shown, in one embodiment, the body 13 is provided with a splicing unit 3, and the body 13 is also provided with a first connection structure 31 and a second connection structure 32. When different power modules 10 are connected, the bodies 13 of these power modules are connected to each other; and / or Figures 8 to 11 The heat sink 14 is provided with a splicing unit 3 , that is, the heat sink 14 is provided with a first connection structure 31 and a second connection structure 32 at the same time. When different power modules 10 are connected, the heat sinks 14 of these power modules can be connected to each other.

[0098] That is, in this embodiment, the steps of the first connection structure 31 and the second connection structure 32 have the following three modes. The first mode is that the body 13 is provided with a splicing unit 3, and the heat sink 14 is provided with a splicing unit 3; the second mode is that only the body 13 is provided with a splicing unit 3. The third mode is that only the heat sink 14 is provided with a splicing unit 3.

[0099] In the width direction of the shell 1, the main body 13 has a first side surface 135 and a second side surface 136 arranged opposite to each other, and the heat sink 14 has a third side surface 147 and a fourth side surface 148 arranged opposite to each other; wherein, the first connecting structure 31 on the main body 13 is arranged on the first side surface 135, the second connecting structure 32 on the main body 13 is arranged on the second side surface 136, the first connecting structure 31 on the heat sink 14 is arranged on the third side surface 147, and the second connecting structure 32 on the heat sink 14 is arranged on the fourth side surface 148.

[0100] In the first mode, after assembly, the direction from the first side surface 135 to the second side surface 136 is the same as the direction from the third side surface 147 to the fourth side surface 148, and the first side surface 135 and the third side surface 147 may be flush, and the second side surface 136 and the fourth side surface 148 are flush. In this case, the first surface 11 includes the first side surface 135 and the third side surface 147, and the second surface 12 includes the second side surface 136 and the fourth side surface 148. Alternatively, in the first mode, after assembly, the direction from the first side surface 135 to the second side surface 136 is opposite to the direction from the third side surface 147 to the fourth side surface 148, and the first side surface 135 and the fourth side surface 148 may be flush, and the second side surface 136 and the third side surface 147 are flush. In this case, the first surface 11 includes the first side surface 135 and the fourth side surface 148, and the second surface 12 includes the second side surface 136 and the third side surface 147.

[0101] like Figure 4 and Figure 6 As shown, in one embodiment, a plurality of splicing units 3 are provided on the body 13. For each splicing unit 3 on the body 13, each first connection structure 31 is located on the same side of the body 13; or, the first connection structure 31 of one splicing unit 3 and the second connection structure 32 of another splicing unit 3 may be located on the same side of the body 13.

[0102] like Fig. 9 and Fig.11 As shown, in one embodiment, a plurality of splicing units 3 are provided on the heat dissipation plate 14. For each splicing unit 3 on the heat dissipation plate 14, each first connection structure 31 is located on the same side of the heat dissipation plate 14; or, the first connection structure 31 of one splicing unit 3 and the second connection structure 32 of another splicing unit 3 may be located on the same side of the heat dissipation plate 14.

[0103] like Figure 1 As shown, in one embodiment, the housing 1 further includes a cover 15 , which is connected to the body 13 , and in the thickness direction of the housing 1 , the power unit 2 is located between the cover 15 and the heat sink 14 .

[0104] In one embodiment, the heat sink 14 closes one end of the accommodating cavity 133, and the cover 15 closes the other end of the accommodating cavity 133, that is, the cover 15 and the heat sink 14 respectively close the two ends of the accommodating cavity 133, and the body 13, the heat sink 14 and the cover 15 enclose a accommodating space.

[0105] In one embodiment, the cover 15 and the body 13 may be snap-connected to facilitate the connection and assembly of the body 13 and the cover 15 .

[0106] In one embodiment, the cover 15 is located in the accommodating cavity 133 . At this time, the cover 15 can be sealed and connected to the side wall of the accommodating cavity 133 , so that the cover 15 closes one end of the accommodating cavity 133 .

[0107] like Figure 3 As shown, in one embodiment, a clamping structure 6 is provided on the body 13 , and the clamping structure 6 is used to clamp the cover 15 on the body 13 .

[0108] like Figure 3 As shown, in one embodiment, the snap-fit ​​structure 6 includes a supporting structure 16 and a pressing structure 17, wherein the supporting structure 16 and the pressing structure 17 are both connected to the main body 1, and the pressing structure 17 and the supporting structure 16 are spaced apart along the thickness direction of the outer shell 1; the cover 15 is limited between the supporting structure 16 and the pressing structure 17; at least one of the pressing structure 17 and the cover 15 has elasticity, so that the cover 15 can be placed between the supporting structure 16 and the pressing structure 17 from the side of the pressing structure 17 away from the supporting structure 16.

[0109] During assembly, the cover 15 can be set on the side of the pressing structure 17 away from the supporting structure 16, and then force is applied to the cover 15 along the direction from the pressing structure 17 to the supporting structure 16, so that the cover 15 and / or the pressing structure 17 can be deformed, and then the cover 15 can be placed between the supporting structure 16 and the pressing structure 17, thereby achieving the snap connection between the cover 15 and the main body 13.

[0110] In one embodiment, the support structure 16 may be disposed in the accommodating cavity 133 .

[0111] like Figure 3As shown, in one embodiment, a step surface is provided on the inner side wall of the accommodating cavity 133, and the step surface is the support structure 16. Specifically, in the thickness direction of the housing 1, the accommodating cavity 133 includes a first hole 137 and a second hole 138 that are connected in sequence, wherein the radial dimension (such as diameter or length and width, etc.) of the first hole 137 is smaller than the radial dimension of the first hole 137, so that a step surface is formed between the two. After assembly, the cover 15 is located in the second hole 138, and the power unit 2 can be arranged in the first hole 137.

[0112] like Figure 3 As shown, in one embodiment, the pressing structure 17 includes a column 171 and a pressing block 172, wherein the column 171 is disposed in the accommodating cavity 133 and protrudes from the second hole 138 along the direction from the first hole 137 to the second hole 138, and the pressing block 172 is connected to one end of the column 171 protruding from the second hole 138. In addition, in the width direction of the housing 1, the pressing block 172 protrudes inwardly from the column 171, and the two are connected to form an L-shaped structure. In addition, the column 171 can be disposed on the side wall of the accommodating cavity 133.

[0113] Among them, the side of the column 171 close to the axis of the accommodating cavity 133 is the inner side of the column 171, and in the thickness direction of the shell 1, the pressing block 172 is spaced a certain distance from the step surface. After assembly, the cover 15 is limited between the pressing block 172 and the step surface.

[0114] In addition, the cover 15 and the pressing block 172 can both be made of plastic, and both have a certain degree of elasticity.

[0115] Furthermore, in some scenarios, the pressing block 172 and / or the column 171 may protrude out of the accommodating cavity 133 along the direction from the first hole 137 to the second hole 138 .

[0116] like Figure 3 As shown, in one embodiment, in the width direction of the housing 1 , pressing structures 17 are provided on both sides of the body 13 , and the pressing structures 17 on the two sides may be the same.

[0117] like Figure 3 As shown, in one embodiment, a groove 161 is provided on the step surface, and in the width direction of the shell 1, the groove 161 penetrates to the inner side surface of the first hole 137, but in the length and thickness directions of the shell 1, the groove 161 does not penetrate the side wall of the first hole 137.

[0118] The column 171 is disposed on the bottom surface of the groove 161 , which can reduce or avoid adverse effects of the column 171 on the installation of the power module 100 .

[0119] like Figure 1As shown, in one embodiment, an avoidance structure 18 is provided on the inner surface of the accommodating cavity 133 and / or the cover 15 ; the signal terminal 21 of the power unit 2 can protrude from the avoidance structure 18 to the surface of the cover 15 away from the heat sink 14 .

[0120] like Figure 1 As shown, the cover 15 is provided with an avoidance structure 18 , and the avoidance structure 18 may be a notch penetrating the cover 15 along the thickness direction of the housing 1 .

[0121] In addition, if Figure 3 As shown, in the length direction of the housing 1, the support structure 16 is spaced a certain distance from the side wall of the groove 161. In some scenarios, the spacing may be the avoidance structure 18. In other embodiments, the avoidance structure 18 on the body 13 may also be disposed at other positions.

[0122] When avoidance structures 18 are provided on the inner surfaces of the cover 15 and the accommodating cavity 133, the avoidance structures 18 on the two can be relatively connected to form a window, and a signal terminal 21 of the power unit 2 can protrude from a window on the surface of the cover 15 away from the heat sink 14. At this time, in the width direction of the housing 1, a part of the signal terminal 21 is located in the avoidance structure 18 of the cover 15, and the other part of the signal terminal 21 is located in the avoidance structure 18 on the inner surface of the accommodating cavity 133.

[0123] In one embodiment, a through hole is provided on the cavity wall of the accommodating cavity 133 , and the power module 10 further includes a pin, which passes through the through hole and is connected to a terminal of the power unit 2 .

[0124] In one embodiment, a plurality of through holes are provided, namely, a first avoidance hole and a second avoidance hole; the first avoidance hole and the second avoidance hole both penetrate the cavity wall of the accommodating cavity 133; Figure 1 and Figure 2 As shown, the pins include an AC pin 4 and a DC pin 5; the AC pin 4 is inserted into the first avoidance hole and is sealedly connected to the hole wall of the first avoidance hole, one end of the AC pin 4 is located in the accommodating cavity and is connected to the AC terminal 22 of the power unit 2, and the other end of the AC pin 4 is located outside the accommodating cavity; the DC pin 5 is inserted into the second avoidance hole and is sealedly connected to the hole wall of the second avoidance hole, one end of the DC pin 5 is located in the accommodating cavity and is connected to the DC terminal 23 of the power unit 2, and the other end of the DC pin 5 is located outside the accommodating cavity.

[0125] Among them, the first avoidance hole and the second avoidance hole can be set on the main body 13, the main body 13 can be made of plastic, the main body 13, the AC pin 4 and the DC pin 5 can be integrally formed by injection molding, at this time, a sealed connection between the AC pin 4 and the hole wall of the first avoidance hole, and a sealed connection between the DC pin 5 and the hole wall of the second avoidance hole can also be achieved.

[0126] In addition, in the length direction of the housing 1 , the first avoidance hole and the second avoidance hole are respectively arranged on the two side walls of the body 13 .

[0127] It should be noted that there are two DC pins 5, one positive pin and one negative pin. In this case, the number of the second avoidance hole can be one, and both DC pins 5 are arranged in the second avoidance hole, but there is an insulating member between the two DC pins 5 to avoid electrical contact between the two. Of course, in other scenarios, there can be two second avoidance holes, and one DC pin 5 is inserted into one second avoidance hole.

[0128] like Figure 1 As shown, the housing 1 further includes a first reinforcing block 19 and a second reinforcing block 1a, wherein the first reinforcing block 19 and the second reinforcing block 1a are respectively connected to the two ends of the length direction of the body 13, the first reinforcing block 19 is provided with a third avoidance hole, and the second reinforcing block 1a is provided with a fourth avoidance hole; the AC pin 4 passes through the first reinforcing block 19 from the third avoidance hole, and the AC pin 4 and the hole wall of the third avoidance hole can be sealed; the DC pin 5 passes through the second reinforcing block 1a from the fourth avoidance hole, and the DC pin 5 and the hole wall of the fourth avoidance hole can be sealed. This arrangement can make the connection between the AC pin 4 and the DC pin 5 more secure.

[0129] During production, the body 13, the AC pin 4, the DC pin 5, the first reinforcement block 19 and the second reinforcement block 1a can be integrally formed by injection molding.

[0130] like Figure 1 As shown, in one embodiment, the housing 1 is further provided with a positioning column 1b. When processing the housing 1, the positioning column can cooperate with other positioning structures to achieve positioning of the housing 1, wherein the positioning column 1b can be arranged on the second reinforcement structure.

[0131] In addition, the positioning column 1b includes a column and a positioning plate, the column may be a cylindrical structure, the column is arranged on the second reinforcement structure and extends along the thickness direction of the housing 1, and the positioning plate is arranged on the side of the column and extends along the thickness direction of the housing 1. There may be multiple positioning plates, which are evenly arranged around the axis of the column.

[0132] like Fig.12As shown, the embodiment of the utility model further provides a power module 100, which includes any one of the power modules 10 described above, and the power module 100 includes a plurality of power modules 10. In addition, the power module 100 is formed by connecting a plurality of power modules 10.

[0133] In addition, if Figures 13 to 15 As shown, the power module 100 also includes a cooling module 20, and the cooling module 20 has a fluid channel 7; each power module 10 is connected to the cooling module 20. When in use, a coolant can be introduced into the fluid channel 7, so that the coolant can cool down each power module 10. Among them, the external coolant can be introduced into the cooling module 20 from the fluid channel 7, and can flow out of the cooling module 20 from the fluid channel 7, that is, the fluid channel 7 can form two openings on the cooling module 20, one of which is a liquid inlet and the other is a liquid outlet.

[0134] like Fig.15 As shown, a avoidance window 8 is provided on the shell of the fluid channel 7, and the avoidance window 8 penetrates to the outer surface of the cooling module 20; the power module 10 extends into the fluid channel 7 through the avoidance window 8, and the power module 10 closes the avoidance window 8. In this way, the power module 10 can directly contact the coolant in the fluid channel 7, thereby improving the cooling effect. Among them, the shell of the fluid channel 7 encloses the fluid channel 7.

[0135] Specifically, the plate body 142 of the heat sink 14 is connected to the cooling module 20 and closes the avoidance window 8, and the heat dissipation fins 143 of the heat sink 14 can extend into the fluid channel 7. After the power module 10 closes the avoidance window 8, the coolant in the fluid channel 7 can be prevented from flowing out of the cooling module from the avoidance window 8.

[0136] In addition, the heat sink 14 and the cooling module 20 may be directly connected by bolts. In this case, the heat sink 14 is provided with mounting holes for the bolts to pass through.

[0137] It should be noted that the heat dissipation fins 143 of each power module 10 can extend into the fluid channel 7. In order to improve the waterproof effect, waterproof glue can be applied between two adjacent power modules 10 to prevent water leakage therebetween.

[0138] In addition, the cooling module 20 can be a rectangular structure, the fluid channel 7 penetrates the cooling module 20 along its length direction, and the avoidance window 8 is arranged on a surface in the thickness direction of the cooling module 20. For example, the fluid channel 7 extends along the left and right directions, and the avoidance window 8 is arranged on the upper surface of the cooling module 10.

[0139] The present utility model also provides an inverter, which includes the power module 10 described in any one of the above embodiments. When working, the power module 10 can convert direct current into alternating current, or the power module 10 can also convert alternating current into direct current. In addition, the inverter can also include the power module 100 described in any one of the above embodiments.

[0140] The embodiment of the utility model further provides an electric assembly, which includes a controller and any of the power modules described above, wherein the controller is electrically connected to the power module 10, and specifically, the controller may be electrically connected to the signal terminal of the power unit 2 to control the operation of the power unit 2. The number of power modules 10 included in the electric assembly may be one or more. Of course, the electric assembly may also include any one of the power module and the inverter described in any of the above embodiments.

[0141] The present utility model also provides a vehicle, which includes any of the power modules 10 described above. The number of power modules 10 included in the vehicle can be one or more. Of course, the vehicle can also include any one of the power modules, inverters, and electric assemblies described in any of the above embodiments.

[0142] It should be understood that the above-mentioned related designs can also be replaced by other methods, such as:

[0143] In other embodiments, the heat dissipation fins 143 may also be a plate-shaped structure.

[0144] In other embodiments, only the first connection structure 31 may be disposed on one of the body 13 and the heat dissipation plate 14 , and only the second connection structure 32 may be disposed on the other one.

[0145] In other embodiments, the supporting structure 16 may also be the second end surface 132 , and in this case, the pressing structure 17 may be disposed on the second end surface 132 .

[0146] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0147] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power module, characterized in that: It comprises a housing (1) and a power unit (2); The power unit (2) is arranged in the housing (1); At least one splicing unit (3) is provided on the housing (1); The splicing unit (3) of one power module can be detachably connected to the splicing unit (3) of another power module.

2. The power module according to claim 1, characterized in that: The splicing unit (3) comprises a first connection structure (31) and a second connection structure (32); the first connection structure (31) of one power module can be detachably connected to the second connection structure (32) of another power module.

3. The power module according to claim 2, characterized in that: The first connection structure (31) and the second connection structure (32) comprised by one of the splicing units (3) are respectively arranged on two opposite sides of the housing (1).

4. The power module according to claim 3, characterized in that: The first connection structure (31) and the second connection structure (32) included in one of the splicing units (3) are respectively arranged on two sides in the width direction of the housing (1); The first connecting structure (31) is a clamping block, the second connecting structure (32) is a clamping slot, and the first connecting structure (31) is suitable for clamping with the second connecting structure (32).

5. The power module according to claim 4, characterized in that: The card slot extends along the length direction of the housing (1) and penetrates at least one end surface of the housing (1) in the length direction; In the depth direction of the card slot, along the direction from the opening of the card slot to the bottom surface of the card slot, the size of the card slot gradually increases, and the size of the card block gradually increases accordingly.

6. The power module according to claim 2, characterized in that: The number of the splicing units (3) is multiple; In the thickness direction of the shell (1), the first connection structures (31) of the splicing units (3) are arranged in sequence and at intervals, and the second connection structures (32) of the splicing units (3) are arranged in sequence and at intervals; The first connection structure (31) and the second connection structure (32) included in one of the splicing units (3) are respectively arranged on two sides in the width direction of the housing (1); Each of the first connection structures (31) on one of the power modules can be connected to or separated from each of the second connection structures (32) on another of the power modules at the same time.

7. The power module according to claim 1, characterized in that: The housing (1) comprises a body (13) and a heat sink (14); In the thickness direction of the shell (1), the body (13) has a first end surface (131) and a second end surface (132) arranged opposite to each other, and the body (13) is provided with a receiving cavity (133) penetrating the first end surface (131) and the second end surface (132); The heat dissipation plate (14) is connected to the body (13); The power unit (2) is arranged on the heat dissipation plate (14) and is located in the accommodating cavity (133).

8. The power module according to claim 7, characterized in that: The main body (13) is provided with the splicing unit (3); and / or, The splicing unit (3) is provided on the heat dissipation plate (14).

9. The power module according to claim 7, characterized in that: The heat dissipation plate (14) is connected to the first end surface (131) and closes an opening of the accommodating cavity (133) formed on the first end surface (131).

10. The power module according to claim 7, characterized in that: The housing (1) further comprises a cover (15), wherein the cover (15) is connected to the body (13); In the thickness direction of the housing (1), the power unit (2) is located between the cover (15) and the heat sink (14).

11. The power module according to claim 10, characterized in that: The sealing cover (15) and the heat dissipation plate (14) respectively seal two ends of the accommodating cavity (133).

12. The power module according to claim 10, characterized in that: The sealing cover (15) is located in the accommodating cavity (133).

13. The power module according to claim 12, characterized in that: The main body (13) is provided with a clamping structure (6), and the clamping structure (6) is used to clamp the sealing cover (15) onto the main body (13).

14. The power module according to claim 10, characterized in that: An avoidance structure (18) is provided on the inner surface of the accommodating cavity (133) and / or the sealing cover (15); The signal terminal of the power unit (2) can protrude from the avoidance structure (18) to a surface of the cover (15) facing away from the heat sink (14).

15. The power module according to claim 7, characterized in that: The heat dissipation plate (14) comprises a plate body (142) and a plurality of heat dissipation fins (143); One of the two opposite end faces of the plate body (142) is connected to the body (13), and the other end face is connected to the heat dissipation fins (143).

16. The power module according to claim 7, characterized in that: The heat sink (14) has a first connection area (144) and a second connection area (145), the first connection area (144) is used to connect to the body (13), and the second connection area (145) is used to connect to the power unit (2); A solder resist structure (146) is provided between the first connection area (144) and the second connection area (145).

17. The power module according to claim 1, characterized in that: The housing (1) has a housing cavity (133), the power unit (2) is arranged in the housing cavity (133), and a through hole is provided on a cavity wall of the housing cavity (133); The power module further includes a pin, and the pin passes through the through hole and is connected to a terminal of the power unit.

18. A power module, characterized in that: The invention comprises a plurality of power modules according to any one of claims 1 to 17.

19. The power module according to claim 18, characterized in that: The power module further comprises a cooling module (20), wherein the cooling module (20) has a fluid channel (7); Each of the power modules is connected to the cooling module (20).

20. The power module according to claim 19, characterized in that: The shell of the fluid channel (7) is provided with an avoidance window (8); The power module extends from the avoidance window (8) into the fluid channel (7), and the power module closes the avoidance window (8).

21. An inverter, characterized in that: A power module comprising any one of claims 1-17.

22. An electric assembly, characterized in that: It comprises a controller and a power module according to any one of claims 1 to 17, wherein the controller is electrically connected to the power module.

23. A vehicle, characterized in that: A power module comprising any one of claims 1-17.

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