Power conversion device

Abstract

The utility model provides a power conversion device. The power conversion device includes a housing, a power module, and a heat sink. The shell comprises a first sub-shell and a second sub-shell, the first sub-shell comprises a containing cavity, the containing cavity extends in the first direction and is provided with a containing opening, in the first direction, the second sub-shell is arranged on one side of the first sub-shell, and the second sub-shell covers the containing opening and seals the containing cavity. The power module is accommodated in the accommodating cavity. In the first direction, the radiator is arranged on one side of the first sub-shell and is opposite to the second sub-shell, and the radiator is in heat conduction connection with the power module. Wherein one side of the first sub-shell is provided with a containing groove, the containing groove extends in the first direction and is provided with a first opening, in the first direction, the first opening of the containing groove is opposite to the containing cavity, and the radiator is contained in the containing groove. The radiator is accommodated in the accommodating groove, so that the space utilization rate of the shell is greatly improved on the basis of ensuring the radiating efficiency of the power module, and the miniaturization design of the power conversion equipment is facilitated.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a power conversion device. Background Art

[0002] In the existing power conversion equipment, the power module is accommodated in the housing, and the heat sink is stacked outside the housing. The heat generated by the power module when working is transferred to the outside through the heat sink. However, since the heat sink and the housing both need to occupy space, the existing power conversion equipment has the problem of large volume and inconvenient miniaturization design. Utility Model Content

[0003] The present application provides a power conversion device. The power conversion device includes a shell, a power module and a heat sink. The shell includes a first subshell and a second subshell, the first subshell includes a receiving cavity, the receiving cavity extends along a first direction and has a receiving opening, in the first direction, the second subshell is arranged on one side of the first subshell, the second subshell covers the receiving opening and closes the receiving cavity. The power module is received in the receiving cavity. In the first direction, the heat sink is arranged on one side of the first subshell and faces away from the second subshell, and the heat sink is thermally connected to the power module. Among them, a receiving groove is provided on one side of the first subshell, the receiving groove extends along the first direction and has a first opening, in the first direction, the first opening of the receiving groove faces away from the receiving cavity, and the heat sink is received in the receiving groove.

[0004] In the power conversion device provided by the embodiment of the present application, the heat generated by the power module during operation is transferred to the outside of the housing through the radiator, thereby realizing rapid heat dissipation of the power module. Compared with the existing power conversion device, the power conversion device provided by the present application, because the radiator is accommodated in the accommodation slot, greatly improves the space utilization rate of the housing while ensuring the heat dissipation efficiency of the power module, is conducive to reducing the size of the power conversion device in the first direction, and is conducive to the miniaturized design of the power conversion device.

[0005] In a possible implementation, the first subshell is provided with a first through hole, the first through hole penetrates the first subshell along a first direction, the first through hole is connected to the receiving cavity and the receiving groove, the heat sink is exposed in the receiving cavity from the first through hole, and the heat sink contacts the power module.

[0006] The design of the contact between the radiator and the power module is conducive to improving the efficiency of transferring the heat generated by the power module when it is working to the radiator, and is conducive to improving the efficiency of transferring the heat generated by the power module when it is working to the outside of the shell through the radiator, which is conducive to improving the heat dissipation efficiency of the power module.

[0007] In a possible implementation manner, the receiving groove passes through the first subshell along the second direction and has a second opening, the heat sink is exposed to the outside of the shell through the first opening and the second opening, and the second direction is perpendicular to the first direction.

[0008] The receiving groove extends along the first direction and has a first opening, and the receiving groove passes through the first subshell along the second direction and has a second opening, thereby ensuring that the radiator can be exposed to the outside of the shell from the first opening and the second opening, which is beneficial to increasing the contact area between the radiator and the environment outside the shell, and is beneficial to improving the efficiency of transferring the heat generated by the power module during operation to the outside of the shell through the radiator, and is beneficial to improving the heat dissipation efficiency of the power module.

[0009] In a possible implementation, the power conversion device includes a circuit board and an inductor. The circuit board is accommodated in a receiving cavity. In a first direction, the circuit board is installed on one side of the power module and faces away from the first sub-shell. The inductor is accommodated in the receiving groove. The inductor is spaced apart from the heat sink, and the inductor is electrically connected to the circuit board.

[0010] The design of accommodating the inductor in the accommodating slot not only ensures that the heat generated by the inductor during operation can be directly transferred to the outside of the shell, thereby achieving rapid heat dissipation of the inductor, but also greatly improves the space utilization rate of the shell, which is beneficial to reducing the size of the power conversion device in the first direction and facilitating the miniaturized design of the power conversion device.

[0011] In one possible implementation, the first subshell is provided with a second through-hole, the second through-hole penetrates the first subshell along the first direction, the second through-hole is connected to the receiving cavity and the receiving groove, the second through-hole is spaced apart from the first through-hole, the power conversion device includes a connector, the connector passes through the second through-hole, and the connector is arranged between the inductor and the circuit board; or, the inductor passes through the second through-hole, and the inductor is plugged into the circuit board.

[0012] The design of the second perforation facilitates the electrical connection of the inductor to the circuit board through methods including but not limited to cables or plugging, which helps to reduce the difficulty of electrical connection between the inductor and the circuit board and helps to reduce the processing cost of the power conversion equipment.

[0013] In a possible implementation, the inductor includes an inductor shell and an inductor body. A mounting groove is provided on one side of the inductor shell. The mounting groove extends along a first direction and has an opening. In the first direction, the opening of the mounting groove faces the receiving cavity. The inductor body is received in the mounting groove. The inductor body is electrically connected to the circuit board. The inductor shell is provided with a thermal fin, and the thermal fin is located outside the mounting groove.

[0014] The heat generated by the inductor body when it is working is transferred to the external environment through the inductor shell. The inductor shell is provided with a design of heat-conducting fins, which is conducive to increasing the heat dissipation area of ​​the heat generated by the inductor body when it is working and transferred to the outside through the inductor shell, which is conducive to improving the efficiency of transferring the heat generated by the inductor body when it is working to the outside through the inductor shell, which is conducive to improving the heat dissipation efficiency of the inductor body and the heat dissipation efficiency of the inductor.

[0015] In one possible embodiment, the power conversion device includes an auxiliary module. In a first direction, the auxiliary module is installed on one side of the circuit board and faces the power module. The auxiliary module is accommodated in a receiving cavity. The projection of the auxiliary module in a third direction overlaps with the projection of the receiving groove in the third direction. The third direction is arranged perpendicular to the first direction.

[0016] The design of the projection of the auxiliary module in the third direction overlapping with the projection of the receiving groove in the third direction is conducive to improving the space utilization of the receiving cavity, reducing the size of the shell in the first direction, improving the space utilization of the shell, facilitating the miniaturization design of the shell, miniaturizing the design of the power conversion equipment, and improving the power density of the power conversion equipment.

[0017] In a possible implementation, the receiving cavity includes a first cavity and a second cavity. In the third direction, the second cavity is located on one side of the first cavity and is connected to the second cavity. The depth dimension of the second cavity is greater than the depth dimension of the first cavity. The projection of the first cavity in the first direction overlaps with the projection of the receiving groove in the first direction. The projection of the second cavity in the third direction overlaps with the projection of the receiving groove in the third direction. The power module is received in the first cavity, and the auxiliary module is received in the second cavity.

[0018] On the basis of ensuring that both the power module and the auxiliary module can be accommodated in the accommodating cavity, the depth dimension of the first cavity is adapted to the dimension of the power module in the first direction, and the depth dimension of the second cavity is adapted to the dimension of the auxiliary module in the first direction. The design that the power module is accommodated in the first cavity and the auxiliary module is accommodated in the second cavity can ensure that the projection of the auxiliary module in the third direction overlaps with the projection of the accommodating groove in the third direction, which is conducive to improving the space utilization rate of the accommodating cavity, reducing the size of the shell in the first direction, improving the space utilization rate of the shell, miniaturizing the shell, miniaturizing the power conversion device, and improving the power density of the power conversion device.

[0019] In one possible embodiment, the power conversion device includes a capacitor. In a first direction, the capacitor is installed on one side of the circuit board and faces the power module. The capacitor is accommodated in a second cavity. The capacitor and the auxiliary module are spaced apart. The projection of the capacitor in a third direction overlaps with the projection of the receiving groove in the third direction.

[0020] The design of accommodating the capacitor in the second cavity can ensure that the projection of the capacitor in the third direction overlaps with the projection of the accommodating groove in the third direction, which is beneficial to improving the space utilization of the accommodating cavity, reducing the size of the shell in the first direction, improving the space utilization of the shell, facilitating the miniaturized design of the shell, facilitating the miniaturized design of the power conversion device, and improving the power density of the power conversion device.

[0021] In one possible implementation, the receiving cavity includes a third cavity. In the third direction, the third cavity is located on one side of the first cavity and faces away from the second cavity. The third cavity is connected to the first cavity. The depth of the third cavity is greater than the depth of the first cavity. The projection of the third cavity in the third direction overlaps with the projection of the receiving groove in the third direction. The power conversion device includes a capacitor. In the first direction, the capacitor is installed on one side of the circuit board and faces the power module. The capacitor is received in the third cavity. The projection of the capacitor in the third direction overlaps with the projection of the receiving groove in the third direction.

[0022] The design of accommodating the capacitor in the third cavity can ensure that the projection of the capacitor in the third direction overlaps with the projection of the accommodating groove in the third direction, which is beneficial to improving the space utilization of the accommodating cavity, reducing the size of the shell in the first direction, improving the space utilization of the shell, facilitating the miniaturized design of the shell, facilitating the miniaturized design of the power conversion device, and improving the power density of the power conversion device.

[0023] In a possible embodiment, the power conversion device includes an air guide cover. In a first direction, the air guide cover is arranged on one side of the radiator and faces away from the first sub-shell. The air guide cover covers the receiving slot. The air guide cover is provided with an air inlet and an air outlet. The air inlet extends along the first direction and is connected to the receiving slot. The air outlet extends along the second direction and is connected to the receiving slot. The second direction is arranged perpendicular to the first direction.

[0024] The cooling air can flow from the outside of the air guide cover through the air inlet holes to the radiator, and then flow out of the air guide cover through the air outlet holes of the radiator to achieve heat dissipation of the radiator, and then achieve heat dissipation of the power module. The design of the air guide cover can guide the cooling air, which is beneficial to improve the heat dissipation efficiency of the radiator and the power module.

[0025] In a possible embodiment, the power conversion device includes a fan. In a first direction, the fan is arranged on one side of the air guide cover and faces the radiator. The fan and the radiator are spaced apart, and a projection of the fan in the first direction overlaps with a projection of the air inlet in the first direction.

[0026] The fan is used to form heat dissipation wind. The heat dissipation wind formed by the fan can flow from the outside of the air guide cover through the air inlet hole to the radiator, and then flow out of the air guide cover through the radiator through the air outlet hole, thereby achieving heat dissipation of the radiator, and then achieving heat dissipation of the power module. The design in which the fan is arranged on one side of the air guide cover and faces the radiator is conducive to improving the space utilization of the power conversion equipment, reducing the size of the power conversion equipment in the first direction, and facilitating the miniaturization design of the power conversion equipment; moreover, it can prevent the fan from being exposed to the outside of the air guide cover, and the design is beautiful, which can prevent the fan from being affected by the external environment and affecting its operation, and is conducive to improving the working life of the fan.

[0027] In a possible implementation, a first baffle and a second baffle are provided on one side of the air guide cover. In a first direction, the first baffle and the second baffle are both facing the radiator. In a second direction, the first baffle and the second baffle are located on both sides of the fan and are spaced apart from the fan.

[0028] The design of the first baffle and the second baffle can guide the heat dissipation wind formed by the fan, ensuring that the heat dissipation wind flowing into the air guide cover from the air inlet hole flows stably toward the radiator along the first direction, which is beneficial to improving the efficiency of the heat dissipation wind flowing through the radiator, improving the heat dissipation efficiency of the radiator, and improving the heat dissipation efficiency of the power module.

[0029] In one possible embodiment, the air guide cover includes a fixed portion and a sliding portion, the sliding portion is slidably connected to the fixed portion along a second direction, in the first direction, the fixed portion is arranged on one side of the radiator and faces away from the first subshell, the sliding portion is located between the fixed portion and the radiator, and the air inlet and the air outlet are both arranged on the fixed portion; the sliding portion is provided with ventilation holes, the ventilation holes are connected to the air inlet holes, the fan is arranged on one side of the sliding portion and faces away from the fixed portion, and the projection of the fan in the first direction overlaps with the projection of the ventilation holes in the first direction.

[0030] The sliding part is connected to the fixed part by sliding along the second direction. The fan is arranged on one side of the sliding part and is facing away from the fixed part. This ensures that the fan can be maintained or replaced by driving the sliding part to slide relative to the fixed part. This avoids the need to remove the air guide cover before maintaining or replacing the fan, which is beneficial to reducing the difficulty of maintaining or replacing the fan and facilitating the maintenance or replacement of the fan.

[0031] In one possible embodiment, the fixed part is provided with a sliding groove, which extends along the second direction. The sliding groove extends along the first direction and has a sliding groove opening. In the first direction, the sliding groove opening faces the radiator. The fixed part is provided with a matching hole, which penetrates the fixed part along the second direction. The sliding part is slidably connected in the sliding groove along the second direction, and the sliding part is movably installed in the matching hole along the second direction.

[0032] The sliding part is connected to the sliding groove by sliding along the second direction, and the sliding part is movably installed in the matching hole along the second direction, so that the sliding part can slide along the second direction relative to the fixed part, and the sliding part can be pulled out from the matching hole along the sliding groove, so that the fan arranged on the sliding part can be maintained or repaired, which is beneficial to reduce the difficulty of maintaining or replacing the fan and facilitates the maintenance or replacement of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0034] Figure 1It is a structural block diagram of the cooperation between the power conversion system provided by the embodiment of the present application and the photovoltaic components and the power grid;

[0035] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the power conversion system shown;

[0036] Figure 3 yes Figure 2 The three-dimensional structure decomposition diagram of the power conversion system shown;

[0037] Figure 4 yes Figure 3 A schematic diagram of the three-dimensional structure of a power conversion device of the power conversion system shown in another angle;

[0038] Figure 5 yes Figure 4 The schematic diagram of the structure of the power conversion device shown is cut along the AA line;

[0039] Figure 6 yes Figure 5 The three-dimensional structure exploded schematic diagram of the power conversion device shown;

[0040] Figure 7 yes Figure 4 The schematic diagram of the partial structure of the housing of the power conversion device shown is cut along the AA line;

[0041] Figure 8 yes Figure 4 The schematic diagram of the exploded three-dimensional structure of the housing of the power conversion device shown in another angle;

[0042] Fig. 9 yes Figure 4 A schematic diagram of a three-dimensional structure explosion of a housing (the third housing is omitted) of a power conversion device shown;

[0043] Fig.10 yes Figure 4 The power conversion device shown is a schematic diagram of a three-dimensional structure exploded from another angle, omitting the second sub-shell, fasteners, inductor and heat dissipation components;

[0044] Fig.11 yes Figure 4 The schematic diagram of the partial structure of the power conversion device shown (the air guide cover, the mounting part and the fan are omitted) cut along the BB line;

[0045] Fig.12 yes Fig.11 A partial exploded schematic diagram of the three-dimensional structure of the power conversion device shown;

[0046] Fig.13 yes Fig.12 A schematic diagram of the three-dimensional structure of the power conversion device after the inductor is assembled at another angle;

[0047] Fig.14 yes Fig.12 The schematic diagram of the three-dimensional structure of the heat sink of the power conversion device shown is shown at another angle;

[0048] Fig.15 yes Figure 4 A schematic diagram of the three-dimensional structure of a heat dissipation assembly (heat sink omitted) of a power conversion device shown in FIG.

[0049] Fig.16 yes Fig.15 The three-dimensional structural exploded schematic diagram of the heat dissipation component shown;

[0050] Fig.17 yes Figure 4 The power conversion device shown is a schematic structural diagram of another embodiment cut along line AA. DETAILED DESCRIPTION

[0051] The embodiment of the present application provides a power conversion device. The power conversion device is applied to a power conversion system. A power conversion system is a system for converting direct current into alternating current or alternating current into direct current. The power conversion device provided by the present application is conducive to improving the space utilization of the box and is conducive to the miniaturized design of the power conversion device.

[0052] The embodiments of the present application are described below in conjunction with the drawings in the embodiments of the present application.

[0053] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , Figure 1 It is a structural block diagram of the cooperation between the power conversion system 1000 provided in the embodiment of the present application, the photovoltaic module 2000 and the power grid 3000. Figure 2 yes Figure 1 The three-dimensional structural schematic diagram of the power conversion system 1000 is shown. Figure 3 yes Figure 2 The three-dimensional structural exploded schematic diagram of the power conversion system 1000 is shown. Figure 4 yes Figure 3 The power conversion device 200 of the power conversion system 1000 is shown as a three-dimensional structural schematic diagram at another angle. Figure 5 yes Figure 4 The power conversion device 200 shown is a schematic structural diagram cut along line AA. Figure 6 yes Figure 5 The three-dimensional structural exploded schematic diagram of the power conversion device 200 is shown.

[0054] like Figure 1 As shown, illustratively, the power conversion system 1000 is used to convert the direct current output by the photovoltaic assembly 2000 into alternating current and supply it to the power grid 3000. The power conversion system 1000 includes a carrier 100 and a power conversion device 200. The power conversion device 200 is mounted on the carrier 100. The power conversion device 200 is used to convert the direct current output by the photovoltaic assembly 2000 into alternating current and supply it to the power grid 3000. Exemplarily, the power conversion device 200 is a photovoltaic inverter. In some other embodiments, the power conversion device 200 can also be used to convert the direct current output by the photovoltaic assembly 2000 into alternating current and supply it to a load device. The load device can be an electronic device that uses alternating current, including but not limited to a motor, a fan or an air conditioner. The power conversion device 200 can also be used to convert the direct current output by the battery into alternating current to supply the motor. The power conversion device 200 can also be an electronic device for power conversion, such as a rectifier, a transformer, a converter or other inverter.

[0055] like Figure 2 and Figure 3 As shown, in some embodiments, the carrier 100 includes a carrier body 101, a matching piece 102 and a reinforcing piece 103. In the X-axis direction, the matching piece 102 is arranged on one side of the carrier body 101. Specifically, the matching piece 102 is fixedly stacked on one side of the carrier body 101. Exemplarily, the number of matching pieces 102 is 2. In some other embodiments, the number of matching pieces 102 may also be 1, 3 or more. In the Y-axis direction, two matching pieces 102 are arranged oppositely and spaced apart. The reinforcing piece 103 is arranged between the two matching pieces 102. Specifically, the reinforcing piece 103 is fixedly stacked between the two matching pieces 102. The design of the reinforcing piece 103 is conducive to increasing the strength of the matching piece 102 and improving the structural stability of the carrier 100. Among them, the matching piece 102 is provided with a matching groove 1021. The matching groove 1021 penetrates the matching piece 102 along the Z-axis direction. The matching groove 1021 extends along the X-axis direction and has an opening, and the opening of the matching groove 1021 faces the carrying body 101 .

[0056] For the sake of ease of description, this application defines three mutually perpendicular directions as a first direction (i.e., the X-axis direction in the figure), a second direction (i.e., the Y-axis direction in the figure) and a third direction (i.e., the Z-axis direction in the figure). The second direction is set perpendicular to the first direction, and the third direction is set perpendicular to the first direction and the second direction.

[0057] In some embodiments, in the X-axis direction, the power conversion device 200 is located on one side of the mating piece 102 and faces away from the carrier body 101. The power conversion device 200 is mounted on the mating piece 102. Specifically, the power conversion device 200 is partially inserted into the mating groove 1021 of the mating piece 102, and the power conversion device 200 abuts against the mating piece 102.

[0058] like Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, the power conversion device 200 includes a housing 10, a circuit board 20, a power module 30, an auxiliary module 40, a capacitor 50, an inductor 60 and a heat dissipation component 70. The circuit board 20, the power module 30, the auxiliary module 40 and the capacitor 50 are all accommodated in the housing 10. The inductor 60 and the heat dissipation component 70 are both installed outside the housing 10. The power module 30, the auxiliary module 40, the capacitor 50 and the inductor 60 are all installed on the circuit board 20, and the capacitor 50 is electrically connected to the circuit board 20. Among them, the auxiliary module 40 includes an input terminal 41, an input module 42, an output module 43, an output terminal 44 and a functional module 45. The input terminal 41, the input module 42, the output module 43, the output terminal 44 and the functional module 45 are all installed on the circuit board 20 and electrically connected. The inductor 60 includes an inductor housing 61 and an inductor body 62. The inductor body 62 is accommodated in the inductor housing 61. The inductor body 62 is electrically connected to the circuit board 20. Exemplarily, the inductor body 62 includes a first inductor body 62a and a second inductor body 62b. The first inductor body 62a and the second inductor body 62b are accommodated in the inductor housing 61. The first inductor body 62a and the second inductor body 62b are both electrically connected to the circuit board 20.

[0059] like Figure 3 and Figure 4 As shown, the heat dissipation assembly 70 is mounted on the mating piece 102. The heat dissipation assembly 70 is partially inserted into the mating groove 1021 of the mating piece 102, and the heat dissipation assembly 70 abuts against the mating piece 102. The power conversion device 200 is mounted on the mating piece 102 through the heat dissipation assembly 70, and the power conversion device 200 is mounted on the carrier 100.

[0060] like Figure 1 As shown, the direct current output by the photovoltaic component 2000 is transmitted from the input terminal 41 to the first inductor body 62a via the input module 42. The first inductor body 62a is used to boost the direct current output by the photovoltaic component 2000. The direct current boosted by the first inductor body 62a is transmitted to the power module 30. The power module 30 is used to convert direct current into alternating current. The alternating current output by the power module 30 is transmitted to the second inductor body 62b. The second inductor body 62b is used to filter the alternating current output by the power module 30. The alternating current processed by the second inductor body 62b is transmitted to the power grid 3000 via the output module 43 and the output terminal 44 to supply the power grid 3000. The functional module 45 can be used to supply energy to the power conversion device 200, that is, the functional module 45 is an auxiliary source. In some other embodiments, the functional module 45 can also be used to sample the direct current received by the power module 30.

[0061] Among them, the power module 30 converts direct current into alternating current by continuously opening and closing to realize the power conversion function. The capacitor 50 is used to perform a buffering function on the power module 30 to ensure that the power module 30 can convert direct current into alternating current. Specifically, when the power module 30 is closed, the direct current after the boosting process of the first inductor body 62a can not only be delivered to the power module 30, but also be delivered to the capacitor 50 to charge the capacitor 50. When the power module 30 is opened, the direct current after the boosting process of the first inductor body 62a will not be delivered to the power module 30, and the capacitor 50 discharges to supply energy to the power module 30, thereby ensuring that in the process of converting direct current into alternating current, the power module 30 can always work stably, and the functional module 30 can stably convert direct current into alternating current to realize the power conversion function.

[0062] See also Figure 7 , Figure 8 and Fig. 9 , and combined with Figure 4 , Figure 7 yes Figure 4 The schematic diagram of the partial structure of the housing 10 of the power conversion device 200 is shown cut along the AA line. Figure 8 yes Figure 4 The illustrated schematic diagram is a three-dimensional structural exploded view of the housing 10 of the power conversion device 200 at another angle. Fig. 9 yes Figure 4 The schematic diagram of the exploded three-dimensional structure of the housing 10 (the third housing 14 is omitted) of the power conversion device 200 is shown.

[0063] like Figure 4 , Figure 7 and Figure 8 As shown, in some embodiments, the housing 10 includes a first sub-housing 11, a second sub-housing 12, a fastener 13, and a third housing 14. In the X-axis direction (i.e., the first direction), the second sub-housing 12 is disposed on one side of the first sub-housing 11 through the fastener 13, and the second sub-housing 12 is disposed on one side of the first sub-housing 11. In the Z-axis direction, the third housing 14 is disposed on one side of the first sub-housing 11.

[0064] like Figure 7 and Figure 8As shown, in some embodiments, the first subshell 11 includes a first cavity wall 111, a second cavity wall 111a, a third cavity wall 111b, a fourth cavity wall 111c, a fifth cavity wall 111d, a sixth cavity wall 111e, a seventh cavity wall 111f and an eighth cavity wall 111g. The first cavity wall 111 extends along the Z-axis direction. In the X-axis direction, the second cavity wall 111a is connected to one side of the first cavity wall 111. The second cavity wall 111a extends along the X-axis direction. In the X-axis direction, the third cavity wall 111b is located on one side of the second cavity wall 111a and faces away from the first cavity wall 111. In the Z-axis direction, the third cavity wall 111b is located on one side of the second cavity wall 111a and faces away from the first cavity wall 111. The third cavity wall 111b is connected to the second cavity wall 111a. The third cavity wall 111b extends along the Z-axis direction. In the X-axis direction, the fourth cavity wall 111c is located on one side of the third cavity wall 111b and faces the second cavity wall 111a. In the Z-axis direction, the fourth cavity wall 111c is located on one side of the third cavity wall 111b and faces away from the second cavity wall 111a. The fourth cavity wall 111c is connected to the third cavity wall 111b. The fourth cavity wall 111c extends along the X-axis direction.

[0065] In the X-axis direction, the fifth cavity wall 111d is located on one side of the fourth cavity wall 111c and faces away from the third cavity wall 111b. In the Z-axis direction, the fifth cavity wall 111d is located on one side of the fourth cavity wall 111c and faces away from the third cavity wall 111b. The fifth cavity wall 111d is connected to the fourth cavity wall 111c. The fifth cavity wall 111d extends along the Z-axis direction. In the X-axis direction, the sixth cavity wall 111e is located on one side of the first cavity wall 111 and faces away from the second cavity wall 111a. In the Z-axis direction, the sixth cavity wall 111e is located on one side of the first cavity wall 111 and faces away from the second cavity wall 111a. The sixth cavity wall 111e is connected to the first cavity wall 111. The sixth cavity wall 111e extends along the X-axis direction. In the X-axis direction, the seventh cavity wall 111f is located on one side of the sixth cavity wall 111e and faces away from the first cavity wall 111. In the Z-axis direction, the seventh cavity wall 111f is located on one side of the sixth cavity wall 111e and faces away from the first cavity wall 111. The seventh cavity wall 111f is connected to the sixth cavity wall 111e.

[0066] The number of the eighth cavity walls 111g is 2. In the Y-axis direction, one eighth cavity wall 111g is connected to one side of the first cavity wall 111, the second cavity wall 111a, the third cavity wall 111b, the fourth cavity wall 111c, the fifth cavity wall 111d, the sixth cavity wall 111e and the seventh cavity wall 111f; the other eighth cavity wall 111g is connected to the other side of the first cavity wall 111, the second cavity wall 111a, the third cavity wall 111b, the fourth cavity wall 111c, the fifth cavity wall 111d, the sixth cavity wall 111e and the seventh cavity wall 111f.

[0067] The first cavity wall 111, the second cavity wall 111a, the third cavity wall 111b, the fourth cavity wall 111c, the fifth cavity wall 111d, the sixth cavity wall 111e, the seventh cavity wall 111f and the two eighth cavity walls 111g are surrounded to form a receiving cavity 112. In other words, the first subshell 11 includes a receiving cavity 112. The receiving cavity 112 extends along the X-axis direction (i.e., the first direction) and has a receiving opening 1120. Among them, the first cavity wall 111, the sixth cavity wall 111e and the two eighth cavity walls 111g are surrounded to form a first cavity 1121. The second cavity wall 111a, the third cavity wall 111b, the fourth cavity wall 111c and the two eighth cavity walls 111g are surrounded to form a second cavity 1122. In other words, the receiving cavity 112 includes a first cavity 1121 and a second cavity 1122. In the Z-axis direction (i.e., the third direction), the second cavity 1122 is located on one side of the first cavity 1121 and is connected to the first cavity 1121. The dimension of the second cavity 1122 in the X-axis direction (i.e., the depth dimension of the second cavity 1122) is greater than the dimension of the first cavity 1121 in the X-axis direction (i.e., the depth dimension of the first cavity 1121).

[0068] The first cavity wall 111 and the second cavity wall 111a are enclosed to form a receiving groove 113. In other words, a receiving groove 113 is provided on one side of the first sub-shell 11. The receiving groove 113 extends along the X-axis direction (i.e., the first direction) and has a first opening 1131. In the X-axis direction (i.e., the first direction), the first opening 1131 of the receiving groove 113 is opposite to the first cavity 1121, and the first opening 1131 of the receiving groove 113 is opposite to the receiving cavity 112. And the receiving groove 113 extends along the Y-axis direction and has a second opening 1132. In other words, the receiving groove 113 passes through the first sub-shell 11 along the Y-axis direction (i.e., the second direction) and has a second opening 1132. Exemplarily, the number of the second openings 1132 is 2. In the Y-axis direction, the two second openings 1132 are arranged opposite to each other. In some other embodiments, the number of the second opening 1132 may also be 1, and the second opening 1132 may also be omitted. The receiving groove 113 extends along the Z-axis direction and has a third opening 1133. That is, the receiving groove 113 passes through the first sub-shell 11 along the Z-axis direction and has a third opening 1133. In the Z-axis direction, the third opening 1133 faces away from the second cavity 1122.

[0069] It can be understood that the projection of the receiving groove 113 in the X-axis direction overlaps with the projection of the first cavity 1121 in the X-axis direction. In other words, the projection of the first cavity 1121 in the X-axis direction (i.e., the first direction) overlaps with the projection of the receiving groove 113 in the X-axis direction (i.e., the first direction). In the Z-axis direction, the receiving groove 113 is located on one side of the second cavity 1122 and faces the first cavity 1121. The projection of the receiving groove 113 in the Z-axis direction overlaps with the projection of the second cavity 1122 in the Z-axis direction. In other words, the projection of the second cavity 1122 in the Z-axis direction (i.e., the third direction) overlaps with the projection of the receiving groove 113 in the Z-axis direction (i.e., the third direction).

[0070] In some embodiments, the first sub-shell 11 is provided with a first through hole 114. The first through hole 114 penetrates the first sub-shell 11 along the X-axis direction (i.e., the first direction). Specifically, the first through hole 114 penetrates the first cavity wall 111 along the X-axis direction. The first through hole 114 is connected to the first cavity 1121 and the receiving groove 113, and the first through hole 114 is connected to the receiving cavity 112 and the receiving groove 113.

[0071] In some embodiments, the first subshell 11 is provided with a second through hole 115. The second through hole 115 penetrates the first subshell 11 along the X-axis direction (i.e., the first direction). Specifically, the second through hole 115 penetrates the first cavity wall 111 along the X-axis direction. In the Z-axis direction, the second through hole 115 is located on one side of the first through hole 114 and faces the second cavity 1122. The second through hole 115 is spaced apart from the first through hole 114. The second through hole 115 is connected to the first cavity 1121 and the receiving groove 113, and the second through hole 115 is connected to the receiving cavity 112 and the receiving groove 113. In some other embodiments, in the Z-axis direction, the second through hole 115 may also be located on one side of the first through hole 114 and face away from the second cavity 1122. The second through hole 115 is spaced apart from the first through hole 114.

[0072] In some embodiments, the first subshell 11 is provided with a first through hole 116. Specifically, the fourth cavity wall 111c is provided with a first through hole 116. The first through hole 116 penetrates the fourth cavity wall 111c along the Z-axis direction. The first through hole 116 is connected to the second cavity 1122, and the first through hole 116 is connected to the receiving cavity 112. Exemplarily, the number of the first through holes 116 is multiple. Specifically, the number of the first through holes 116 is 16. In some other embodiments, the number of the first through holes 116 may also be 1, 2 or more. The multiple first through holes 116 are arranged at intervals from each other.

[0073] In some embodiments, the first sub-shell 11 is provided with a second through hole 117. Specifically, the fourth cavity wall 111c is provided with a second through hole 117. The second through hole 117 penetrates the fourth cavity wall 111c along the Z-axis direction. The second through hole 117 is connected to the second cavity 1122, and the second through hole 117 is connected to the receiving cavity 112. In the Y-axis direction, the second through hole 117 is located on one side of the plurality of first through holes 116 and is spaced apart from the first through holes 116.

[0074] like Fig. 9 As shown, in some embodiments, the first subshell 11 is provided with a first mounting hole 118. Specifically, the seventh cavity wall 111f is provided with a first mounting hole 118, and the first mounting hole 118 passes through the seventh cavity wall 111f along the X-axis direction. In the Z-axis direction, the first mounting hole 118 is located on one side of the receiving cavity 112 and is spaced apart from the receiving cavity 112. Exemplarily, the number of the first mounting holes 118 is multiple, and specifically, the number of the first mounting holes 118 is 4. In some other embodiments, the number of the first mounting holes 118 may also be 1, 2 or more. In the Y-axis direction, multiple first mounting holes 118 are spaced apart in sequence.

[0075] In some embodiments, the first subshell 11 is provided with a second mounting hole 118a. Specifically, the fifth cavity wall 111d is provided with a second mounting hole 118a, and the second mounting hole 118a penetrates the fifth cavity wall 111d along the X-axis direction. In the Z-axis direction, the second mounting hole 118a is located on one side of the receiving cavity 112 and faces away from the first mounting hole 118, and the second mounting hole 118a is spaced apart from the receiving cavity 112. Exemplarily, the number of the second mounting holes 118a is multiple, and specifically, the number of the second mounting holes 118a is 4. In some other embodiments, the number of the second mounting holes 118a may also be 1, 2 or more. In the Y-axis direction, multiple second mounting holes 118a are spaced apart in sequence.

[0076] In some embodiments, the first subshell 11 is provided with a third mounting hole 118b. Specifically, each eighth cavity wall 111g is provided with a third mounting hole 118b, and the third mounting hole 118b passes through the eighth cavity wall 111g along the X-axis direction. In the Y-axis direction, the third mounting hole 118b is located on one side of the receiving cavity 112 and is spaced apart from the receiving cavity 112. Exemplarily, the number of the third mounting holes 118b is multiple, and specifically, the number of the third mounting holes 118b is 3. In some other embodiments, the number of the third mounting holes 118b may also be 1, 2 or more. In the Z-axis direction, multiple third mounting holes 118b are spaced apart in sequence.

[0077] like Figure 4 , Figure 6 and Figure 8As shown, in some embodiments, in the X-axis direction, the second subshell 12 is disposed on one side of the receiving opening 1120 of the receiving cavity 112 and faces away from the receiving groove 113. The second subshell 12 covers the receiving opening 1120 and closes the receiving cavity 112. The second subshell 12 includes a first surface 121, a second surface 122, a third surface 123, and a fourth surface 124. The orientation of the first surface 121, the orientation of the second surface 122, the orientation of the third surface 123, and the orientation of the fourth surface 124 are the same. In the Z-axis direction, the first surface 121 and the second surface 122 are opposite and spaced apart, and the third surface 123 and the fourth surface 124 are located between the first surface 121 and the second surface 122, and are spaced apart from the first surface 121 and the second surface 122. In the Y-axis direction, the third surface 123 and the fourth surface 124 are located on both sides of the first surface 121 and the second surface 122, and are spaced apart from the first surface 121 and the second surface 122. The first surface 121, the second surface 122, the third surface 123 and the fourth surface 124 are all facing the first subshell 11. The first surface 121 is stacked with the seventh cavity wall 111f. The second surface 122 is stacked with the fifth cavity wall 111d. The third surface 123 and the fourth surface 124 are stacked with two eighth cavity walls 111g respectively.

[0078] The second sub-shell 12 is provided with a first mating mounting hole 125. The first mating mounting hole 125 extends from the first surface 121 along the X-axis direction. Exemplarily, the number of the first mating mounting holes 125 is multiple. The number of the first mating mounting holes 125 is equal to the number of the first mounting holes 118. The multiple first mating mounting holes 125 are connected to the multiple first mounting holes 118 in a one-to-one correspondence.

[0079] The second sub-shell 12 is provided with a second mating mounting hole 126. The second mating mounting hole 126 extends from the second surface 122 along the X-axis direction. Exemplarily, the number of the second mating mounting holes 126 is multiple. The number of the second mating mounting holes 126 is equal to the number of the second mounting holes 118a. The multiple second mating mounting holes 126 are connected to the multiple second mounting holes 118a in a one-to-one correspondence.

[0080] The second subshell 12 is provided with a third mating mounting hole 127. The third mating mounting hole 127 extends from the third surface 123 along the X-axis direction. The second subshell 12 is provided with a fourth mating mounting hole 128. The fourth mating mounting hole 128 extends from the fourth surface 124 along the X-axis direction. Exemplarily, the number of the third mating mounting holes 127 is multiple, and the number of the fourth mating mounting holes 128 is multiple. The number of the third mating mounting holes 127 is equal to the number of the third mounting holes 118b of one eighth cavity wall 111g. The plurality of third mating mounting holes 127 are connected to the plurality of third mounting holes 118b of the eighth cavity wall 111g in a one-to-one correspondence. The number of the fourth mating mounting holes 128 is equal to the number of the third mounting holes 118b of another eighth cavity wall 111g. The plurality of fourth mating mounting holes 128 are connected to the plurality of third mounting holes 118b of the eighth cavity wall 111g in a one-to-one correspondence.

[0081] In some embodiments, the second sub-shell 12 is provided with a mounting hole 129. The mounting hole 129 penetrates the second sub-shell 12 along the X-axis direction. The mounting hole 129 is arranged at intervals with the first matching mounting hole 125, the second matching mounting hole 126, the third matching mounting hole 127, and the fourth matching mounting hole 128. The second sub-shell 12 can be mounted on an external component through the mounting hole 129, that is, the housing 10 can be mounted on an external component through the mounting hole 129, and the power conversion device 200 can be mounted on an external component through the mounting hole 129.

[0082] In some embodiments, the number of fasteners 13 is multiple. Specifically, the number of fasteners 13 is 14. The 14 fasteners 13 are divided into 4 first fasteners 13a, 4 second fasteners 13b, 3 third fasteners 13c and 3 fourth fasteners 13d. The 4 first fasteners 13a are installed in the multiple first mounting holes 118 and the multiple first matching mounting holes 125 in a one-to-one correspondence. The 4 second fasteners 13b are installed in the multiple second mounting holes 118a and the multiple second matching mounting holes 126 in a one-to-one correspondence. The 3 third fasteners 13c are installed in the multiple third mounting holes 118b and the multiple third matching mounting holes 127 of one eighth cavity wall 111g in a one-to-one correspondence. The 3 fourth fasteners 13d are installed in the multiple third mounting holes 118b and the multiple fourth matching mounting holes 128 of another eighth cavity wall 111g in a one-to-one correspondence. Thus, through the plurality of fasteners 13 , the second sub-shell 12 is disposed at one side of the receiving opening 1120 of the receiving cavity 112 and faces away from the receiving groove 113 , and the second sub-shell 12 covers the receiving opening 1120 and closes the receiving cavity 112 .

[0083] like Figure 4 and Figure 8As shown, in some embodiments, in the Z-axis direction, the third housing 14 is disposed on one side of the fourth cavity wall 111c and facing away from the receiving cavity 112 by means including but not limited to welding, gluing or screws, and the third housing 14 is disposed on one side of the first sub-shell 11 and facing away from the receiving cavity 112. The third housing 14 is provided with a groove 141. The groove 141 extends along the Z-axis direction and has an opening, and the opening of the groove 141 is connected to the second through hole 117.

[0084] See also Fig.10 , and combined with Figure 1 , Figure 5 and Figure 6 , Fig.10 yes Figure 4 The power conversion device 200 shown is a schematic diagram of a three-dimensional structure explosion at another angle, omitting the second sub-shell 12, the fastener 13, the inductor 60 and the heat dissipation component 70.

[0085] like Figure 5 and Fig.10 As shown, in some embodiments, the circuit board 20 is accommodated in the accommodating cavity 112. In the X-axis direction, the circuit board 20 is located between the first sub-shell 11 and the second sub-shell 12, and is spaced apart from the first sub-shell 11 and the second sub-shell 12. Specifically, the circuit board 20 is located between the first cavity wall 111 and the second sub-shell 12, and the circuit board 20 is spaced apart from the first cavity wall 111 and the second sub-shell 12. In the X-axis direction, the circuit board 20 is located on one side of the plurality of first through holes 116 and faces away from the third cavity wall 111b, and the circuit board 20 is located on one side of the second through hole 117 and faces away from the third cavity wall 111b.

[0086] like Figure 5 , Figure 6 and Fig.10 As shown, in some embodiments, in the X-axis direction, the power module 30 is mounted on one side of the circuit board 20 and faces the first sub-shell 11. Specifically, the power module 30 is fixedly connected to one side of the circuit board 20 and faces the first sub-shell 11 by means including but not limited to plugging or welding. In other words, in the X-axis direction (i.e., the first direction), the circuit board 20 is mounted on one side of the power module 30 and faces away from the first sub-shell 11. In the X-axis direction, the power module 30 is spaced apart from the first sub-shell 11, and the power module 30 is spaced apart from the first cavity wall 111. The power module 30 is accommodated in the accommodating cavity 112. Specifically, the power module 30 is accommodated in the first cavity 1121. Among them, the projection of the power module 30 in the X-axis direction overlaps with the projection of the first through hole 114 in the X-axis direction. Exemplarily, the number of power modules 30 is multiple, and specifically, the number of power modules 30 is 10. In some other embodiments, the number of power modules 30 may also be 1, 2 or more. In the Y-axis direction, a plurality of power modules 30 are arranged in sequence and spaced apart from each other.

[0087] In some embodiments, in the X-axis direction, the auxiliary module 40 is mounted on one side of the circuit board 20 and faces the power module 30. In the Z-axis direction, the auxiliary module 40 is located on one side of the power module 30 and is spaced apart from the power module 30. The auxiliary module 40 is received in the receiving cavity 112. Specifically, the auxiliary module 40 is received in the second cavity 1122. The projection of the auxiliary module 40 in the Z-axis direction (i.e., the third direction) overlaps with the projection of the receiving groove 113 in the Z-axis direction (i.e., the third direction).

[0088] On the basis of ensuring that both the power module 30 and the auxiliary module 40 can be accommodated in the accommodating cavity 112, the depth dimension of the first cavity 1121 (i.e., the dimension of the first cavity 1121 in the X-axis direction) is adapted to the dimension of the power module 30 in the first direction (i.e., the X-axis direction), and the depth dimension of the second cavity 1122 (i.e., the dimension of the second cavity 1122 in the X-axis direction) is adapted to the dimension of the auxiliary module 40 in the first direction (i.e., the X-axis direction). The design that the power module 30 is accommodated in the first cavity 1121 and the auxiliary module 40 is accommodated in the second cavity 1122 can ensure that the projection of the auxiliary module 40 in the Z-axis direction (i.e., the third direction) overlaps with the projection of the accommodating groove 113 in the Z-axis direction (i.e., the third direction), which is conducive to improving the space utilization rate of the accommodating cavity 112, reducing the dimension of the housing 10 in the X-axis direction (i.e., the first direction), improving the space utilization rate of the housing 10, miniaturizing the design of the housing 10, miniaturizing the design of the power conversion device 200, and improving the power density of the power conversion device 200.

[0089] It can be understood that the design in which the projection of the auxiliary module 40 in the Z-axis direction (i.e., the third direction) overlaps with the projection of the receiving groove 113 in the Z-axis direction (i.e., the third direction), is conducive to improving the space utilization of the receiving cavity 112, reducing the size of the shell 10 in the X-axis direction (i.e., the first direction), improving the space utilization of the shell 10, facilitating the miniaturized design of the shell 10, miniaturizing the design of the power conversion device 200, and improving the power density of the power conversion device 200.

[0090] In some embodiments, in the X-axis direction, the input terminal 41 is mounted on one side of the circuit board 20 and faces the power module 30. In the Z-axis direction, the input terminal 41 is located on one side of the power module 30 and is spaced apart from the power module 30. The input terminal 41 includes a connecting portion 411 and a terminal portion 412. In the Z-axis direction, the terminal portion 412 is fixedly connected to one side of the connecting portion 411. Exemplarily, the number of terminal portions 412 is multiple. Specifically, the number of terminal portions 412 is 16. In some other embodiments, the number of terminal portions 412 may also be 1, 2 or more. Among them, the connecting portion 411 is mounted on the circuit board 20. In the Z-axis direction, the connecting portion 411 is located on one side of the power module 30 and is spaced apart from the power module 30. Multiple terminal portions 412 face away from the power module 30.

[0091] The connection portion 411 is received in the second cavity 1122. The plurality of terminal portions 412 are correspondingly installed in the plurality of first through holes 116. The plurality of terminal portions 412 are partially received in the second cavity 1122 and partially exposed outside the second cavity 1122. The input terminal 41 receives the photovoltaic module 2000 (such as Figure 1 The projection of the connection portion 411 in the Z-axis direction and the projection of the plurality of terminal portions 412 in the Z-axis direction overlap with the projection of the receiving groove 113 in the Z-axis direction. That is, the projection of the input terminal 41 in the Z-axis direction overlaps with the projection of the receiving groove 113 in the Z-axis direction.

[0092] In some embodiments, in the X-axis direction, the input module 42 is mounted on one side of the circuit board 20 and faces the power module 30. In the Z-axis direction, the input module 42 is located between the power module 30 and the input terminal 41, and is spaced apart from the power module 30 and the input terminal 41. The input module 42 is received in the second cavity 1122. In the X-axis direction, the input module 42 is spaced apart from the first sub-shell 11, and the input module 42 is spaced apart from the third cavity wall 111b. The projection of the input module 42 in the Z-axis direction overlaps with the projection of the receiving groove 113 in the Z-axis direction.

[0093] In some embodiments, in the X-axis direction, the output module 43 is mounted on one side of the circuit board 20 and faces the power module 30. In the Z-axis direction, the output module 43 is located between the power module 30 and the input terminal 41, and is spaced apart from the power module 30 and the input terminal 41. In the Y-axis direction, the output module 43 is located on one side of the input terminal 41 and the input module 42, and is spaced apart from the input terminal 41 and the input module 42. The output module 43 is accommodated in the second cavity 1122. In the X-axis direction, the output module 43 is spaced apart from the first subshell 11, and the output module 43 is spaced apart from the third cavity wall 111b. The projection of the output module 43 in the Z-axis direction overlaps with the projection of the receiving groove 113 in the Z-axis direction.

[0094] In some embodiments, in the X-axis direction, the output terminal 44 is mounted on one side of the circuit board 20 and faces the power module 30. In the Z-axis direction, the output terminal 44 is located on one side of the output module 43 and faces away from the power module 30, and the output terminal 44 is spaced apart from the output module 43. In the Y-axis direction, the output terminal 44 is located on one side of the input terminal 41 and faces the output module 43, and the output terminal 44 is spaced apart from the input terminal 41. The output terminal 44 is inserted into the second through hole 117. The output terminal 44 is partially accommodated in the second cavity 1122, and partially accommodated in the groove 141 of the third housing 14. In the X-axis direction, the output terminal 44 is spaced apart from the first sub-shell 11, and the output terminal 44 is spaced apart from the third cavity wall 111b. The output terminal 44 is spaced apart from the third housing 14, and the output terminal 44 is spaced apart from the groove wall of the groove 141. The projection of the output terminal 44 in the Z-axis direction overlaps with the projection of the receiving groove 113 in the Z-axis direction.

[0095] In some embodiments, in the X-axis direction, the functional module 45 is installed on one side of the circuit board 20 and faces the power module 30. In the Z-axis direction, the functional module 45 is located between the power module 30 and the input terminal 41, and is spaced apart from the power module 30 and the input terminal 41. In the Y-axis direction, the functional module 45 is located between the input module 42 and the output module 43, and is spaced apart from the input module 42 and the output module 43. The functional module 45 is accommodated in the second cavity 1122. In the X-axis direction, the functional module 45 is spaced apart from the first sub-shell 11, and the functional module 45 is spaced apart from the third cavity wall 111b. The projection of the functional module 45 in the Z-axis direction overlaps with the projection of the receiving groove 113 in the Z-axis direction.

[0096] In some embodiments, in the X-axis direction (i.e., the first direction), the capacitor 50 is installed on one side of the circuit board 20 and faces the power module 30. In the Z-axis direction, the capacitor 50 is located between the power module 30 and the auxiliary module 40, and is spaced apart from the power module 30 and the auxiliary module 40. The capacitor 50 is spaced apart from the auxiliary module 40. Exemplarily, the number of capacitors 50 is multiple, and specifically, the number of capacitors 50 is 8. In some other embodiments, the number of capacitors 50 may also be 1, 2, or more. In the Y-axis direction, multiple capacitors 50 are spaced apart in sequence. Among them, multiple capacitors 50 are accommodated in the accommodating cavity 112. The capacitor 50 is accommodated in the accommodating cavity 112, and the capacitor 50 is accommodated in the second cavity 1122. In the X-axis direction, the capacitor 50 is spaced apart from the first subshell 11, and the capacitor 50 is spaced apart from the third cavity wall 111b. The projection of the capacitor 50 in the Z-axis direction overlaps with the projection of the accommodating groove 113 in the Z-axis direction.

[0097] On the basis of ensuring that the capacitor 50 can be accommodated in the accommodating cavity 112, the depth dimension of the second cavity 1122 (i.e., the dimension of the second cavity 1122 in the X-axis direction) is adapted to the dimension of the capacitor 50 in the first direction (i.e., the X-axis direction). The design of accommodating the capacitor 50 in the second cavity 1122 can ensure that the projection of the capacitor 50 in the Z-axis direction (i.e., the third direction) overlaps with the projection of the accommodating groove 113 in the Z-axis direction (i.e., the third direction). The design that the projection of the capacitor 50 in the Z-axis direction (i.e., the third direction) overlaps with the projection of the accommodating groove 113 in the Z-axis direction (i.e., the third direction) is conducive to improving the space utilization rate of the accommodating cavity 112, is conducive to reducing the dimension of the housing 10 in the X-axis direction (i.e., the first direction), is conducive to improving the space utilization rate of the housing 10, is conducive to the miniaturized design of the housing 10, is conducive to the miniaturized design of the power conversion device 200, and is conducive to improving the power density of the power conversion device 200.

[0098] It can be understood that the shape of the accommodating cavity 112 is compatible with the shape of the circuit board 20, the shape of the power module 30, the shape of the auxiliary module 40 and the shape of the capacitor 50. The accommodating cavity 112 is densely filled with the circuit board 20, the power module 30, the auxiliary module 40 and the capacitor 50, which greatly improves the space utilization of the accommodating cavity 112, is beneficial to improving the space utilization of the shell 10, is beneficial to the miniaturized design of the shell 10, is beneficial to the miniaturized design of the power conversion device 200, and is beneficial to improving the power density of the power conversion device 200.

[0099] See also Fig.11 , Fig.12 and Fig.13 , Fig.11 yes Figure 4The power conversion device 200 shown is a partial structural schematic diagram cut along line BB (the wind guide cover 72, the mounting member 73 and the fan 74 are omitted). Fig.12 yes Fig.11 The schematic diagram of a partial three-dimensional structure explosion of the power conversion device 200 is shown. Fig.13 yes Fig.12 The illustrated schematic diagram is a three-dimensional structural diagram of the inductor 60 of the power conversion device 200 after being assembled at another angle.

[0100] In some embodiments, the inductor 60 is received in the receiving groove 113. The projection of the inductor 60 in the X-axis direction overlaps with the projection of the second through-hole 115 in the X-axis direction. The inductor 60 is electrically connected to the circuit board 20 through the second through-hole 115, and the inductor 60 is electrically connected to the circuit board 20. The design of receiving the inductor 60 in the receiving groove 113 not only ensures that the heat generated by the inductor 60 during operation can be directly transferred to the outside of the housing 10 to achieve rapid heat dissipation of the inductor 60, but also greatly improves the space utilization rate of the housing 10, which is conducive to reducing the size of the power conversion device 200 in the X-axis direction (i.e., the first direction), and is conducive to the miniaturization design of the power conversion device 200.

[0101] In some embodiments, the inductor housing 61 is fixedly stacked on one side of the first cavity wall 111 and faces away from the first cavity 1121 by means including but not limited to welding or gluing. In the X-axis direction, the inductor housing 61 is fixedly stacked on one side of the first sub-shell 11 and faces away from the receiving cavity 112. The inductor housing 61 is received in the receiving groove 113. The projection of the inductor housing 61 in the X-axis direction covers the projection of the second through hole 115 in the X-axis direction.

[0102] A mounting groove 611 is provided on one side of the inductor housing 61. The mounting groove 611 extends along the X-axis direction (i.e., the first direction) and has an opening. In the X-axis direction (i.e., the first direction), the opening of the mounting groove 611 faces the first cavity 1121, and the opening of the mounting groove 611 faces the receiving cavity 112. The opening of the mounting groove 611 is connected to the second through-hole 115, and the mounting groove 611 is connected to the second through-hole 115. The mounting groove 611 is connected to the first cavity 1121, and the mounting groove 611 is connected to the receiving cavity 112. Exemplarily, the number of mounting grooves 611 is multiple. Specifically, the number of mounting grooves 611 is 2. In some other embodiments, the number of mounting grooves 611 may also be 1, 3, or more. In the Y-axis direction, multiple mounting grooves 611 are arranged at intervals.

[0103] In some embodiments, the inductor housing 61 is provided with a heat-conducting fin 612. The heat-conducting fin 612 is located outside the mounting groove 611. Exemplarily, the heat-conducting fin 612 includes a first heat-conducting fin 612a, a second heat-conducting fin 612b and a third heat-conducting fin 612c. In the X-axis direction, the first heat-conducting fin 612a is fixedly stacked on one side of the inductor housing 61 and faces away from the mounting groove 611. In the Y-axis direction, the second heat-conducting fin 612b is fixedly stacked on one side of the inductor housing 61 and faces away from the mounting groove 611. In the Y-axis direction, the third heat-conducting fin 612c is fixedly stacked on one side of the inductor housing 61 and faces away from the second heat-conducting fin 612b. In some other embodiments, the inductor housing 61 may also be provided with only the first heat-conducting fin 612a, the second heat-conducting fin 612b or the third heat-conducting fin 612c.

[0104] In some embodiments, the number of the first inductor bodies 62a of the inductor 60 is multiple. Specifically, the number of the first inductor bodies 62a is 3. In some other embodiments, the number of the first inductor bodies 62a may also be 1, 2 or more. The number of the second inductor bodies 62b of the inductor 60 is multiple. Specifically, the number of the second inductor bodies 62b is 3. In some other embodiments, the number of the second inductor bodies 62b may also be 1, 2 or more. Multiple first inductor bodies 62a are accommodated in one mounting groove 611, and the multiple first inductor bodies 62a are arranged in sequence along the Y-axis direction. Multiple second inductor bodies 62b are accommodated in another mounting groove 611, and the multiple second inductor bodies 62b are arranged in sequence along the Y-axis direction.

[0105] It can be understood that the inductor body 62 of the inductor 60 is accommodated in the mounting groove 611. The projection of the inductor body 62 in the X-axis direction overlaps with the projection of the second through-hole 115 in the X-axis direction. The inductor body 62 is electrically connected to the circuit board 20 through the second through-hole 115, and the inductor body 62 is electrically connected to the circuit board 20. For example, the power conversion device 200 includes a connector (including but not limited to a copper clip and a cable), the connector passes through the second through-hole 115, the connector is connected to the inductor body 62 and the circuit board 20, and the connector is disposed between the inductor 60 and the circuit board 20. Through the connector, the inductor body 62 is electrically connected to the circuit board 20, and the inductor 60 is electrically connected to the circuit board 20. For another example, the inductor body 62 can pass through the second through-hole 115, the inductor body 62 is plugged into the circuit board 20, and the inductor body 62 is electrically connected to the circuit board 20. That is to say, the inductor 60 passes through the second through hole 115 , the inductor 60 is plugged into the circuit board 20 , and the inductor 60 is electrically connected to the circuit board 20 .

[0106] The design of the second through-hole 115 facilitates the electrical connection of the inductor body 62 (i.e., the inductor 60) to the circuit board 20 through methods including but not limited to cables or plug-ins, which helps to reduce the difficulty of electrical connection between the inductor body 62 (i.e., the inductor 60) and the circuit board 20 and helps to reduce the processing cost of the power conversion device 200.

[0107] The heat generated by the inductor body 62 during operation is transferred to the external environment through the inductor housing 61. The inductor housing 61 is provided with a design of heat-conducting fins 612, which is conducive to increasing the heat dissipation area of ​​the heat generated by the inductor body 62 during operation and transferred to the outside through the inductor housing 61, and is conducive to improving the efficiency of the heat generated by the inductor body 62 during operation and transferred to the outside through the inductor housing 61, which is conducive to improving the heat dissipation efficiency of the inductor body 62 and the heat dissipation efficiency of the inductor 60.

[0108] It can be understood that the receiving groove 113 extends along the X-axis direction (i.e., the first direction) and has a first opening 1131, and the receiving groove 113 passes through the first sub-shell 11 along the Y-axis direction (i.e., the second direction) and has a second opening 1132, which ensures that the inductor 60 can be exposed to the outside of the shell 10 from the first opening 1131 and the second opening 1132, which is beneficial to increase the contact area between the inductor 60 and the environment outside the shell 10, and is beneficial to improve the efficiency of transferring the heat generated by the inductor 60 during operation to the outside of the shell 10, which is beneficial to improve the heat dissipation efficiency of the inductor 60.

[0109] The receiving groove 113 penetrates the first subshell 11 along the Z-axis direction (i.e., the third direction) and has a third opening 1133, thereby ensuring that the inductor 60 can be exposed to the outside of the shell 10 from the third opening 1133, which is beneficial to increasing the contact area between the inductor 60 and the environment outside the shell 10, and is beneficial to improving the efficiency of transferring the heat generated by the inductor 60 during operation to the outside of the shell 10, and is beneficial to improving the heat dissipation efficiency of the inductor 60.

[0110] See also Fig.14 , and combined with Figure 5 , Figure 6 , Fig.11 and Fig.12 , Fig.14 yes Fig.12 The schematic diagram of the three-dimensional structure of the heat sink 71 of the power conversion device 200 is shown at another angle.

[0111] like Figure 5 , Figure 6 and Fig.11As shown, the heat dissipation assembly 70 includes a heat sink 71, an air duct 72, a mounting member 73 and a fan 74. In other words, the power conversion device 200 includes a heat sink 71, an air duct 72, a mounting member 73 and a fan 74. The heat sink 71 is accommodated in the receiving groove 113. The heat sink 71 and the inductor 60 are arranged at intervals. The heat sink 71 is thermally connected to the power module 30. In the X-axis direction, the air duct 72 is arranged on one side of the heat sink 71 and faces away from the housing 10. In the X-axis direction, the mounting member 73 is arranged on one side of the air duct 72 and faces away from the housing 10. And in the X-axis direction, the mounting member 73 is arranged on one side of the housing 10 and faces away from the receiving cavity 112. The air duct 72 is arranged on one side of the heat sink 71 and faces away from the housing 10 through the mounting member 73. In the X-axis direction, the fan 74 is arranged between the air duct 72 and the heat sink 71.

[0112] like Fig.11 , Fig.12 and Fig.14 As shown, in the X-axis direction, the heat sink 71 is fixedly stacked on one side of the first cavity wall 111 and faces away from the first cavity 1121, and the heat sink 71 is fixedly stacked on one side of the first subshell 11 and faces away from the receiving cavity 112. That is, in the X-axis direction (i.e., the first direction), the heat sink 71 is arranged on one side of the first subshell 11 and faces away from the second subshell 12. In the Z-axis direction, the heat sink 71 is located on one side of the inductor 60 and faces away from the second cavity 1122, and the heat sink 71 is spaced apart from the inductor 60. Part of the heat sink 71 is received in the receiving groove 113. Part of the heat sink 71 penetrates into the first cavity 1121 from the first through hole 114, and part of the heat sink 71 penetrates into the receiving cavity 112 from the first through hole 114. That is, the heat sink 71 is exposed in the receiving cavity 112 from the first through hole 114. The heat sink 71 contacts the power module 30. Specifically, the heat sink 71 is fixedly stacked with the power module 30. Thus, the heat sink 71 is thermally connected to the power module 30. The heat generated by the power module 30 during operation can be transferred to the outside of the housing 10 through the heat sink 71. In some other embodiments, the first through hole 114 can also be omitted, and the power module 30 and the heat sink 71 are fixedly stacked on opposite sides of the first cavity wall 111, and the power module 30 can also be thermally connected to the heat sink 71 through the first sub-shell 11.

[0113] In the power conversion device 200 provided in the embodiment of the present application, the heat generated by the power module 30 during operation is transferred to the outside of the housing 10 through the heat sink 71, thereby realizing rapid heat dissipation of the power module 30. Compared with the existing power conversion device 200, the power conversion device 200 provided in the present application, because the heat sink 71 is received in the receiving groove 113, greatly improves the space utilization rate of the housing 10 on the basis of ensuring the heat dissipation efficiency of the power module 30, is conducive to reducing the size of the power conversion device 200 in the X-axis direction (i.e., the first direction), and is conducive to the miniaturization design of the power conversion device 200.

[0114] The design of the heat sink 71 in contact with the power module 30 is beneficial to improving the efficiency of transferring the heat generated by the power module 30 when it is working to the heat sink 71, and is beneficial to improving the efficiency of transferring the heat generated by the power module 30 when it is working to the outside of the shell 10 through the heat sink 71, which is beneficial to improving the heat dissipation efficiency of the power module 30.

[0115] In some embodiments, the heat sink 71 includes a first heat dissipation portion 711 and a second heat dissipation portion 712. In the X-axis direction, the second heat dissipation portion 712 is disposed on one side of the first heat dissipation portion 711. Specifically, the second heat dissipation portion 712 is fixedly stacked on one side of the first heat dissipation portion 711. Among them, the first heat dissipation portion 711 is fixedly stacked on one side of the first cavity wall 111 and faces away from the first cavity 1121, and the first heat dissipation portion 711 is disposed on one side of the first subshell 11 and faces away from the receiving cavity 112. The second heat dissipation portion 712 is inserted into the first through hole 114, and the second heat dissipation portion 712 is partially received in the first cavity 1121, and the second heat dissipation portion 712 is partially received in the receiving cavity 112. The second heat dissipation portion 712 is exposed in the receiving cavity 112 from the first through hole 114. The second heat dissipation portion 712 contacts the power module 30. Specifically, the second heat dissipation portion 712 is fixedly stacked with the power module 30.

[0116] In some embodiments, the heat sink 71 is provided with a heat dissipation fin 713. Specifically, a heat dissipation fin 713 is provided on one side of the first heat dissipation portion 711, and in the X-axis direction, the heat dissipation fin 713 faces away from the second heat dissipation portion 712, and the heat dissipation fin 713 faces away from the first sub-shell 11. Exemplarily, the number of the heat dissipation fins 713 is multiple. Specifically, the number of the heat dissipation fins 713 is 18. In some other embodiments, the number of the heat dissipation fins 713 may also be 1, 2, or more. In the Z-axis direction, the plurality of heat dissipation fins 713 are arranged in sequence and spaced apart.

[0117] The radiator 71 is provided with a design of cooling fins 713, which is beneficial to increasing the heat dissipation area of ​​the heat generated by the power module 30 when working and transferred to the outside through the radiator 71, which is beneficial to improving the efficiency of transferring the heat generated by the power module 30 when working to the outside through the radiator 71, and which is beneficial to improving the heat dissipation efficiency of the power module 30.

[0118] It can be understood that the receiving groove 113 extends along the X-axis direction (i.e., the first direction) and has a first opening 1131, and the receiving groove 113 passes through the first sub-shell 11 along the Y-axis direction (i.e., the second direction) and has a second opening 1132, which ensures that the heat sink 71 can be exposed to the outside of the shell 10 from the first opening 1131 and the second opening 1132, which is beneficial to increase the contact area between the heat sink 71 and the external environment of the shell 10, and is beneficial to improve the efficiency of transferring the heat generated by the power module 30 during operation to the outside of the shell 10 through the heat sink 71, which is beneficial to improve the heat dissipation efficiency of the power module 30.

[0119] The receiving groove 113 penetrates the first subshell 11 along the Z-axis direction (i.e., the third direction) and has a third opening 1133, which ensures that the heat sink 71 can be exposed to the outside of the shell 10 from the third opening 1133, which is beneficial to increase the contact area between the heat sink 71 and the external environment of the shell 10, and is beneficial to improve the efficiency of transferring the heat generated by the power module 30 during operation to the outside of the shell 10 through the heat sink 71, which is beneficial to improve the heat dissipation efficiency of the power module 30.

[0120] See also Fig.15 and Fig.16 , and combined with Figure 3 , Figure 4 , Figure 5 and Figure 6 , Fig.15 yes Figure 4 The heat dissipation assembly 70 (heat sink 71 omitted) of the power conversion device 200 is a schematic three-dimensional structural diagram at another angle. Fig.16 yes Fig.15 The schematic diagram of the three-dimensional structure explosion of the heat dissipation assembly 70 is shown.

[0121] like Figure 5 , Figure 6 and Fig.15 As shown, in some embodiments, the air guide cover 72 is disposed on one side of the heat sink 71 and faces away from the first sub-shell 11. The air guide cover 72 is disposed on one side of the inductor 60 and faces away from the first sub-shell 11. The air guide cover 72 covers the outside of the heat sink 71 and the outside of the inductor 60. The air guide cover 72 covers the receiving slot 113.

[0122] like Figure 5 , Figure 6 and Fig.16 As shown, in some embodiments, the air guide cover 72 includes a fixed portion 721 and a sliding portion 722. The sliding portion 722 is slidably connected to the fixed portion 721 along the Y-axis direction (i.e., the second direction). Among them, in the X-axis direction (i.e., the first direction), the fixed portion 721 is arranged on one side of the heat sink 71 and faces away from the first sub-shell 11. And in the X-axis direction (i.e., the first direction), the fixed portion 721 is arranged on one side of the inductor 60 and faces away from the first sub-shell 11. The fixed portion 721 covers the outside of the heat sink 71 and the outside of the inductor 60. In the X-axis direction, the sliding portion 722 is located between the heat sink 71 and the fixed portion 721, and the sliding portion 722 is spaced apart from the heat sink 71. And in the Z-axis direction, the sliding portion 722 is located on one side of the inductor 60 and faces the heat sink 71, and the sliding portion 722 is spaced apart from the inductor 60. The fixed portion 721 and the sliding portion 722 jointly cover the receiving groove 113.

[0123] In some embodiments, the fixing portion 721 includes a first sub-portion 7211, a second sub-portion 7212, a third sub-portion 7213, a fourth sub-portion 7214, and a fifth sub-portion 7215. The first sub-portion 7211 extends along the Y-axis direction. In the Z-axis direction, the second sub-portion 7212 is connected to one side of the first sub-portion 7211. The second sub-portion 7212 extends along the X-axis direction. In the X-axis direction, the third sub-portion 7213 and the fourth sub-portion 7214 are located on one side of the first sub-portion 7211 and are both connected to the first sub-portion 7211. In the Z-axis direction, the third sub-portion 7213 and the fourth sub-portion 7214 are located on one side of the second sub-portion 7212 and face the first sub-portion 7211, and the third sub-portion 7213 and the fourth sub-portion 7214 are both connected to the second sub-portion 7212. In the Y-axis direction, the third sub-portion 7213 and the fourth sub-portion 7214 are opposite and spaced apart. The third sub-section 7213 and the fourth sub-section 7214 both extend along the Z-axis direction. In the Z-axis direction, the fifth sub-section 7215 is located at one side of the first sub-section 7211 and faces away from the second sub-section 7212, and the fifth sub-section 7215 is connected to the first sub-section 7211. In the Y-axis direction, the fifth sub-section 7215 is located between the third sub-section 7213 and the fourth sub-section 7214, and is connected to the third sub-section 7213 and the fourth sub-section 7214.

[0124] In the X-axis direction, the first sub-portion 7211 is located at one side of the heat sink 71 and faces away from the first cavity wall 111, the first sub-portion 7211 is located at one side of the heat sink 71 and faces away from the first sub-shell 11, and the first sub-portion 7211 is spaced apart from the heat sink 71. In the X-axis direction, the first sub-portion 7211 is located at one side of the inductor 60 and faces away from the first cavity wall 111, the first sub-portion 7211 is located at one side of the inductor 60 and faces away from the first sub-shell 11, and the first sub-portion 7211 is spaced apart from the inductor 60. The projection of the first sub-portion 7211 in the X-axis direction overlaps with the projection of the first opening 1131 of the receiving groove 113 in the X-axis direction. The first sub-portion 7211 covers the first opening 1131 of the receiving groove 113.

[0125] In the Z-axis direction, the second sub-portion 7212 is located at one side of the heat sink 71 and faces away from the inductor 60, and the second sub-portion 7212 is spaced apart from the heat sink 71. The projection of the second sub-portion 7212 in the Z-axis direction overlaps with the projection of the third opening 1133 of the receiving groove 113 in the Z-axis direction. The second sub-portion 7212 covers the third opening 1133 of the receiving groove 113.

[0126] In the Y-axis direction, the third sub-portion 7213 and the fourth sub-portion 7214 are located on opposite sides of the heat sink 71, and the third sub-portion 7213 and the fourth sub-portion 7214 are spaced apart from the heat sink 71. In the Y-axis direction, the third sub-portion 7213 and the fourth sub-portion 7214 are located on opposite sides of the inductor 60, and the third sub-portion 7213 and the fourth sub-portion 7214 are spaced apart from the inductor 60. The projection of the third sub-portion 7213 in the Y-axis direction and the projection of the fourth sub-portion 7214 in the Y-axis direction overlap with the projection of the second opening 1132 in the Y-axis direction. The third sub-portion 7213 and the fourth sub-portion 7214 cover the two second openings 1132 of the receiving groove 113 respectively. In the Z-axis direction, the fifth sub-portion 7215 is located between the inductor 60 and the third cavity wall 111b, and is spaced apart from the inductor 60 and the third cavity wall 111b. In some other embodiments, the fifth sub-portion 7215 may also be omitted.

[0127] In some embodiments, the fixed portion 721 is provided with a first slide rail 7216 and a second slide rail 7216a. Specifically, in the X-axis direction, the first slide rail 7216 and the second slide rail 7216a are arranged on one side of the first sub-portion 7211 and face the third sub-portion 7213, and the first slide rail 7216 and the second slide rail 7216a are fixedly stacked on one side of the first sub-portion 7211 and face the third sub-portion 7213. In the Z-axis direction, the first slide rail 7216 and the second slide rail 7216a are opposite and spaced apart. The first slide rail 7216 and the second slide rail 7216a both extend along the Y-axis direction. The first slide rail 7216, the second slide rail 7216a and the first sub-portion 7211 are surrounded to form a sliding groove 723.

[0128] In other words, the fixed portion 721 is provided with a sliding groove 723. The sliding groove 723 extends along the X-axis direction (i.e., the first direction) and has a sliding groove opening 7231. The sliding groove 723 extends along the Y-axis direction (i.e., the second direction) and has a matching opening 7232. The number of matching openings 7232 is 2. In the Y-axis direction, the two matching openings 7232 are arranged opposite to each other. In some other embodiments, the number of matching openings 7232 facing away from the third sub-portion 7213 can be omitted, that is, the number of matching openings 7232 can also be 1. Among them, the projection of the sliding groove 723 in the X-axis direction overlaps with the projection of the heat sink 71 in the X-axis direction. In the X-axis direction (i.e., the first direction), the sliding groove opening 7231 of the sliding groove 723 faces the heat sink 71. And in the Z-axis direction, the sliding groove 723 is located on one side of the inductor 60 and faces the heat sink 71, and the sliding groove 723 is spaced apart from the inductor 60.

[0129] In some embodiments, the fixing portion 721 is provided with a limiting portion 7216b. Specifically, in the X-axis direction, the limiting portion 7216b is disposed on one side of the first sub-portion 7211 and faces the third sub-portion 7213, and the limiting portion 7216b is fixedly stacked on one side of the first sub-portion 7211 and faces the third sub-portion 7213. In the Y-axis direction, the limiting portion 7216b is located on one side of the sliding groove 723 and faces away from the third sub-portion 7213. The projection of the limiting portion 7216b in the Y-axis direction overlaps with the projection of the sliding groove 723 in the Y-axis direction.

[0130] In some embodiments, the fixed portion 721 is provided with an air inlet 724. In other words, the air guide cover 72 is provided with an air inlet 724, and the air inlet 724 is arranged on the fixed portion 721. The air inlet 724 penetrates the fixed portion 721 along the X-axis direction. The air inlet 724 extends along the X-axis direction (i.e., the first direction). The air inlet 724 is connected to the receiving groove 113. In the Z-axis direction, the air inlet 724 is located between the first slide rail 7216 and the second slide rail 7216a. That is, the projection of the air inlet 724 in the X-axis direction overlaps with the projection of the sliding groove 723 in the X-axis direction. In the Y-axis direction, the air inlet 724 is located between the limiting portion 7216b and the third sub-portion 7213, and is spaced apart from the limiting portion 7216b and the third sub-portion 7213. Exemplarily, the number of the air inlet 724 is multiple. Specifically, the number of the air inlet 724 is 2. In some other embodiments, the number of the air inlet holes 724 may also be 1, 3, or more. In the Y-axis direction, the plurality of air inlet holes 724 are arranged at intervals.

[0131] In some embodiments, the fixed portion 721 is provided with an air outlet 725. In other words, the air guide cover 72 is provided with an air outlet 725, and the air outlet 725 is provided on the fixed portion 721. Specifically, the third sub-portion 7213 and the fourth sub-portion 7214 are both provided with an air outlet 725, and the air outlet 725 provided on the third sub-portion 7213 penetrates the third sub-portion 7213 along the Y-axis direction, and the air outlet 725 provided on the third sub-portion 7213 extends along the Y-axis direction, and the air outlet 725 is connected to the receiving groove 113. It can be understood that the air outlet 725 extends along the Y-axis direction, and the air outlet 725 is connected to the receiving groove 113. Exemplarily, the number of the air outlet 725 provided on the third sub-portion 7213 is multiple, and specifically, the number of the air outlet 725 provided on the third sub-portion 7213 is 4. In some other embodiments, the number of the air outlet holes 725 disposed in the third sub-section 7213 may also be 1, 2, or more. In the Z-axis direction, the plurality of air outlet holes 725 disposed in the third sub-section 7213 are sequentially spaced apart.

[0132] The air outlet hole 725 provided in the fourth sub-section 7214 penetrates the fourth sub-section 7214 along the Y-axis direction, extends along the Y-axis direction, and is communicated with the receiving groove 113. It can be understood that the air outlet hole 725 extends along the Y-axis direction, and is communicated with the receiving groove 113. Exemplarily, the number of the air outlet holes 725 provided in the fourth sub-section 7214 is multiple, and specifically, the number of the air outlet holes 725 provided in the fourth sub-section 7214 is 4. In some other embodiments, the number of the air outlet holes 725 provided in the fourth sub-section 7214 may also be 1, 2, or more. In the Z-axis direction, the multiple air outlet holes 725 provided in the fourth sub-section 7214 are arranged in sequence and spaced apart.

[0133] In some embodiments, the fixing portion 721 is provided with a matching hole 726. Specifically, the matching hole 726 penetrates the third sub-portion 7213 along the Y-axis direction, and the matching hole 726 penetrates the fixing portion 721 along the Y-axis direction (i.e., the third direction). The matching hole 726 is connected to the receiving groove 113. In the X-axis direction, the matching hole 726 is located on one side of the air outlet 725 and faces the sliding groove 723. The projection of the matching hole 726 in the Y-axis direction overlaps with the projection of the sliding groove 723 in the X-axis direction. The matching hole 726 is connected to the matching opening 7232 of the sliding groove 723, and the matching hole 726 is connected to the sliding groove 723. The matching hole 726 is connected to the receiving groove 113.

[0134] In some embodiments, the fixing portion 721 is provided with a first baffle 727. Specifically, the first baffle 727 is provided on one side of the first sub-portion 7211 and faces the third sub-portion 7213, and the first baffle 727 is fixedly connected to one side of the first sub-portion 7211 and faces the third sub-portion 7213. In the Y-axis direction, the first baffle 727 is located on one side of the plurality of air inlet holes 724 and the third sub-portion 7213, and the first baffle 727 is spaced apart from the plurality of air inlet holes 724 and the third sub-portion 7213. The first baffle 727 extends along the Z-axis direction, and the first baffle 727 is fixedly connected to the second sub-portion 7212 and the fifth sub-portion 7215. Among them, the first baffle 727 is provided with a first avoidance hole 7271. The first avoidance hole 7271 extends from the first baffle 727 to one side of the first sub-portion 7211 along the X-axis direction. And the first avoidance hole 7271 penetrates the first baffle 727 along the Y-axis direction. The first avoidance hole 7271 is used to receive the first slide rail 7216 and the second slide rail 7216a.

[0135] In the X-axis direction, the first baffle 727 is located between the first sub-section 7211 and the heat sink 71. In other words, the first baffle 727 is provided on one side of the air guide cover 72. In the X-axis direction (i.e., the first direction), the first baffle 727 faces the heat sink 71. The first baffle 727 is spaced apart from the heat sink 71. In some other embodiments, the first baffle 727 may also contact or abut against the heat sink 71. In the X-axis direction, the first baffle 727 is located between the first sub-section 7211 and the inductor 60.

[0136] In some embodiments, the fixing portion 721 is provided with a second baffle 727a. Specifically, the second baffle 727a is provided on one side of the first sub-portion 7211 and faces the third sub-portion 7213, and the second baffle 727a is fixedly connected to one side of the first sub-portion 7211 and faces the third sub-portion 7213. In the Y-axis direction, the second baffle 727a is located between the plurality of air inlet holes 724 and the limiting portion 7216b, and the second baffle 727a is spaced from the plurality of air inlet holes 724 and the limiting portion 7216b. The second baffle 727a extends along the Z-axis direction, and the second baffle 727a is fixedly connected to the second sub-portion 7212 and the fifth sub-portion 7215. Among them, the second baffle 727a is provided with a second avoidance hole 7271a. The second avoidance hole 7271a extends from the second baffle 727a toward one side of the first sub-portion 7211 along the X-axis direction. And the second avoidance hole 7271a penetrates the second baffle plate 727a along the Y-axis direction. The second avoidance hole 7271a is used to accommodate the first slide rail 7216 and the second slide rail 7216a. It can be understood that in the Y-axis direction, the first baffle plate 727 and the second baffle plate 727a are located on both sides of the plurality of air inlet holes 724 and are spaced apart from the plurality of air inlet holes 724. That is, in the Y-axis direction (i.e., the second direction), the first baffle plate 727 and the second baffle plate 727a are located on both sides of the air inlet hole 724 and are spaced apart from the air inlet hole 724.

[0137] In the X-axis direction, the second baffle 727a is located between the first sub-section 7211 and the heat sink 71. In other words, the second baffle 727a is provided on one side of the air guide cover 72. In the X-axis direction (i.e., the first direction), the second baffle 727a faces the heat sink 71. The second baffle 727a is spaced apart from the heat sink 71. In some other embodiments, the second baffle 727a may also contact or abut against the heat sink 71. In the X-axis direction, the second baffle 727a is located between the first sub-section 7211 and the inductor 60.

[0138] like Figure 5 , Fig.15 and Fig.16As shown. In some embodiments, the sliding portion 722 is slidably connected to the sliding groove 723 along the Y-axis direction (i.e., the second direction). And the sliding portion 722 is movably installed in the matching hole 726 along the Y-axis direction (i.e., the second direction). Specifically, the sliding portion 722 penetrates into the sliding groove 723 from the matching hole 726 through the matching opening 7232 of the sliding groove 723 along the Y-axis direction, and the sliding portion 722 passes through the first avoidance hole 7271 of the first baffle 727 and the second avoidance hole 7271a of the second baffle 727a in the sliding groove 723 along the Y-axis direction, and the sliding portion 722 then abuts against the limiting portion 7216b along the Y-axis direction, so that the sliding portion 722 and the fixed portion 721 are assembled together, the sliding portion 722 blocks the matching hole 726, and the sliding portion 722 and the fixed portion 721 jointly cover the receiving groove 113. The design of the limiting portion 7216b plays a limiting role in the assembly of the sliding portion 722 and the fixing portion 721, so that the sliding portion 722 can be slidably connected to the sliding groove 723 along the Y-axis direction, which is conducive to reducing the difficulty of assembly and the assembly cost of the air guide cover 72. In the X-axis direction, the sliding portion 722 is located between the first sub-portion 7211 and the radiator 71, and the sliding portion 722 is spaced apart from the radiator 71. The projection of the sliding portion 722 in the X-axis direction overlaps with the projection of the radiator 71 in the X-axis direction.

[0139] In some embodiments, the sliding portion 722 includes a first mounting portion 7221 and a second mounting portion 7222. In the Y-axis direction, the second mounting portion 7222 is disposed on one side of the first mounting portion 7221, and the second mounting portion 7222 is fixedly connected to one side of the first mounting portion 7221. The first mounting portion 7221 is slidably connected to the sliding groove 723 along the Y-axis direction. The first mounting portion 7221 and the second mounting portion 7222 can be movably installed in the matching hole 726. When the first mounting portion 7221 abuts against the limiting portion 7216b, the first mounting portion 7221 is located outside the matching hole 726, the second mounting portion 7222 is located in the matching hole 726, and the second mounting portion 7222 blocks the matching hole 726, so that the sliding portion 722 and the fixed portion 721 cover the receiving groove 113 together.

[0140] In some embodiments, the sliding portion 722 is provided with a ventilation hole 7223. The ventilation hole 7223 penetrates the sliding portion 722 along the X-axis direction, and the ventilation hole 7223 penetrates the first mounting portion 7221 along the X-axis direction. Exemplarily, the number of ventilation holes 7223 is multiple, and specifically, the number of ventilation holes 7223 is 2. In some other embodiments, the number of ventilation holes 7223 may also be 1, 3 or more. When the first mounting portion 7221 abuts against the limiting portion 7216b, the second mounting portion 7222 blocks the matching hole 726, and the sliding portion 722 and the fixing portion 721 jointly cover the receiving groove 113, the projections of the multiple ventilation holes 7223 in the X-axis direction overlap with the multiple air inlet holes 724 one by one, and the multiple ventilation holes 7223 are connected to the multiple air inlet holes 724 one by one. That is to say, the ventilation holes 7223 are connected to the air inlet holes 724. The ventilation hole 7223 is communicated with the receiving groove 113 , and the air inlet hole 724 is communicated with the receiving groove 113 through the ventilation hole 7223 .

[0141] In some embodiments, in the X-axis direction, the mounting member 73 is fixedly stacked on one side of the first sub-portion 7211 and faces away from the sliding portion 722, the mounting member 73 is arranged on one side of the first sub-portion 7211 and faces away from the sliding portion 722, the mounting member 73 is arranged on one side of the fixed portion 721 and faces away from the radiator 71, and the mounting member 73 is arranged on one side of the air guide cover 72 and faces away from the first sub-shell 11. And the mounting member 73 is fixedly stacked on one side of the third cavity wall 111b and faces away from the second cavity 1122, and the mounting member 73 is fixedly stacked on one side of the first sub-shell 11 and faces away from the receiving cavity 112. Exemplarily, the number of mounting members 73 is multiple. Specifically, the number of mounting members 73 is 2. In the Y-axis direction, the two mounting members 73 are arranged oppositely and spaced apart. In some other embodiments, the number of mounting members 73 may also be 1, 3 or more.

[0142] In some embodiments, each mounting member 73 includes a first matching portion 731 and a second matching portion 732. That is, the mounting member 73 includes a first matching portion 731 and a second matching portion 732. In the X-axis direction, the second matching portion 732 is disposed on one side of the first matching portion 731. Specifically, the second matching portion 732 is fixedly stacked on one side of the first matching portion 731. Among them, by means including but not limited to screw connection, welding or adhesive connection, in the X-axis direction, the second matching portion 732 is fixedly stacked on one side of the first sub-portion 7211 and faces away from the sliding portion 722. And in the X-axis direction, the second matching portion 732 is fixedly stacked on one side of the third cavity wall 111b and faces away from the second cavity 1122. In the X-axis direction, the first matching portion 731 faces away from the first sub-portion 7211, and the first matching portion 731 faces away from the wind guide cover 72. And in the X-axis direction, the first matching portion 731 faces away from the third cavity wall 111b, and the first matching portion 731 faces away from the first sub-shell 11.

[0143] Thus, in the X-axis direction, the mounting member 73 is fixedly stacked on one side of the air guide cover 72 and faces away from the heat sink 71, and the mounting member 73 is fixedly stacked on one side of the first sub-shell 11 and faces away from the receiving cavity 112. In this way, the air guide cover 72 is fixedly connected to the first sub-shell 11 through the mounting member 73, so that in the X-axis direction, the air guide cover 72 is arranged on one side of the heat sink 71 and faces away from the first sub-shell 11. The design of the mounting member 73 fixedly stacked with the air guide cover 72 and the first sub-shell 11 is conducive to increasing the connection strength between the mounting member 73 and the first sub-shell 11 of the air guide cover 72, and is conducive to improving the structural stability of the power conversion device 200.

[0144] In some embodiments, the first matching portion 731 includes a first section 7311, a second section 7312, a third section 7313, a fourth section 7314, and a fifth section 7315. In the X-axis direction, the second section 7312, the third section 7313, the fourth section 7314, and the fifth section 7315 are all arranged on one side of the first section 7311, and the second section 7312, the third section 7313, the fourth section 7314, and the fifth section 7315 are all fixedly connected to one side of the first section 7311. In the Z-axis direction, the second section 7312, the third section 7313, the fourth section 7314, and the fifth section 7315 are arranged in sequence. The first section 7311 is fixedly connected to the second matching portion 732. In the X-axis direction, the second section 7312, the third section 7313, the fourth section 7314, and the fifth section 7315 are facing away from the second matching portion 732. It can be understood that the hanging member 73 can be held by holding the fourth section 7314, and the power conversion device 200 can be carried by holding the hanging member 73, which is simple and stable in design and has low processing cost. Among them, the first section 7311 and the second section 7312 are surrounded to form a hanging groove 7316. In other words, the hanging member 73 is provided with a hanging groove 7316. The hanging groove 7316 extends along the Z-axis direction and has an opening. In the Z-axis direction, the opening of the hanging groove 7316 faces the third section 7313.

[0145] like Figure 3 and Figure 4 As shown, the mounting member 73 is mounted on the matching member 102 through the mounting groove 7316. Specifically, the second section 7312 of the mounting member 73 is partially inserted into the matching groove 1021 of the matching member 102. In the Z-axis direction, the second section 7312 abuts against the matching member 102. That is, in the Z-axis direction, the groove wall of the mounting groove 7316 abuts against the matching member 102. Thus, the power conversion device 200 is mounted on the matching member 102 through the mounting member 73, and the power conversion device 200 is mounted on the carrier 100. The power conversion device 200 is mounted on an external component (such as the carrier 100) through the mounting groove 7316 of the mounting member 73. The design of the mounting groove 7316, on the basis of realizing the mounting requirements of the power conversion device 200, is not only simple and stable in structure, but also easy to design, which is conducive to reducing processing costs.

[0146] like Figure 5 , Fig.15 and Fig.16 As shown, in some embodiments, in the X-axis direction, the fan 74 is arranged on one side of the first mounting portion 7221 and faces away from the first sub-portion 7211, and the fan 74 is arranged on one side of the sliding portion 722 and faces away from the fixed portion 721. The projection of the fan 74 in the X-axis direction (i.e., the first direction) overlaps with the projection of the ventilation hole 7223 in the X-axis direction (i.e., the first direction). Exemplarily, the number of fans 74 is multiple. Specifically, the number of fans 74 is 2. In some other embodiments, the number of fans 74 may also be 1, 3, or more. The projections of the multiple fans 74 in the X-axis direction overlap with the projections of the multiple ventilation holes 7223 in the X-axis direction in a one-to-one correspondence. When the first mounting portion 7221 abuts against the limiting portion 7216b and the second mounting portion 7222 blocks the matching hole 726, the projections of the multiple fans 74 in the X-axis direction overlap with the projections of the multiple air inlet holes 724 in the X-axis direction in a one-to-one correspondence. That is, the projection of the fan 74 in the X-axis direction (i.e., the first direction) and the projection of the air inlet 724 in the X-axis direction (i.e., the first direction) overlap. In the Y-axis direction, the plurality of fans 74 are located between the first baffle 727 and the second baffle 727a, and are spaced apart from the first baffle 727 and the second baffle 727a. In other words, in the Y-axis direction (i.e., the second direction), the first baffle 727 and the second baffle 727a are located on both sides of the fan 74, and are spaced apart from the fan 74.

[0147] In the X-axis direction, each fan 74 is located between the sliding portion 722 and the radiator 71, and each fan 74 is spaced apart from the radiator 71. In other words, in the X-axis direction (i.e., the first direction), the fan 74 is disposed on one side of the air guide cover 72 and faces the radiator 71, and the fan 74 is spaced apart from the radiator 71. The projection of the fan 74 in the X-axis direction overlaps with the projection of the radiator 71 in the X-axis direction.

[0148] The sliding portion 722 is slidably connected to the sliding groove 723 along the Y-axis direction (i.e., the second direction), and the sliding portion 722 is movably installed in the matching hole 726 along the Y-axis direction (i.e., the second direction). The design ensures that the sliding portion 722 can slide along the Y-axis direction (i.e., the second direction) relative to the fixed portion 721, and the sliding portion 722 can be pulled out from the matching hole 726 along the sliding groove 723, so that the fan 74 arranged on the sliding portion 722 can be maintained or repaired, which is beneficial to reduce the difficulty of maintaining or replacing the fan 74 and facilitate the maintenance or replacement of the fan 74.

[0149] That is to say, the sliding portion 722 is slidably connected to the fixed portion 721 along the Y-axis direction (i.e., the second direction), and the fan 74 is arranged on one side of the sliding portion 722 and is facing away from the fixed portion 721. This ensures that the fan 74 can be maintained or replaced by driving the sliding portion 722 to slide relative to the fixed portion 721, and it can be avoided that the fan 74 is maintained or replaced after removing the air guide cover 72, which is beneficial to reducing the difficulty of maintaining or replacing the fan 74 and facilitating the maintenance or replacement of the fan 74.

[0150] The fan 74 is used to generate heat dissipation wind. The heat dissipation wind generated by the fan 74 can flow from the outside of the wind guide cover 72 through the air inlet hole 724 to the radiator 71, and then flow out of the wind guide cover 72 through the air outlet hole 725 through the radiator 71, thereby dissipating heat for the radiator 71, and further dissipating heat for the power module 30. The heat dissipation wind generated by the fan 74 can flow from the outside of the wind guide cover 72 through the air inlet hole 724 to the inductor 60, and then flow out of the wind guide cover 72 through the air outlet hole 725 through the inductor 60, thereby dissipating heat for the inductor 60.

[0151] It can be understood that the heat dissipation wind can flow from the outside of the air guide cover 72 to the radiator 71 through the air inlet hole 724, and then flow out of the air guide cover 72 through the radiator 71 through the air outlet hole 725, so as to achieve heat dissipation of the radiator 71, and then achieve heat dissipation of the power module 30. The heat dissipation wind can flow from the outside of the air guide cover 72 to the inductor 60 through the air inlet hole 724, and then flow out of the air guide cover 72 through the inductor 60 through the air outlet hole 725, so as to achieve heat dissipation of the inductor 60. The design of the air guide cover 72 can guide the heat dissipation wind, which is conducive to improving the heat dissipation efficiency of the radiator 71, the heat dissipation efficiency of the power module 30, and the heat dissipation efficiency of the inductor 60.

[0152] The design in which the fan 74 is arranged on one side of the air guide cover 72 and faces the radiator 71 is beneficial to improving the space utilization of the power conversion device 200, reducing the size of the power conversion device 200 in the first direction, and facilitating the miniaturization design of the power conversion device 200; moreover, the fan 74 can be prevented from being exposed to the outside of the air guide cover 72, and the design is beautiful. The fan 74 can be prevented from being affected by the external environment and affecting its operation, which is beneficial to increasing the service life of the fan 74.

[0153] The design of the first baffle 727 and the second baffle 727a can guide the heat dissipation wind formed by the fan 74, ensuring that the heat dissipation wind flowing into the air guide cover 72 from the air inlet hole 724 flows stably toward the radiator 71 along the first direction, which is beneficial to improving the efficiency of the heat dissipation wind flowing through the radiator 71, and is beneficial to improving the heat dissipation efficiency of the radiator 71, and is beneficial to improving the heat dissipation efficiency of the power module 30.

[0154] See also Fig.17 , and combined with Figure 5 , Fig.17 yes Figure 4 The power conversion device 200 shown is a schematic structural diagram of another embodiment cut along line AA.

[0155] In some other embodiments, the receiving cavity 112 includes a third cavity 1123. In the Z-axis direction (i.e., the third direction), the third cavity 1123 is located on one side of the first cavity 1121 and faces away from the second cavity 1122. The third cavity 1123 is connected to the first cavity 1121. The depth dimension of the third cavity 1123 (i.e., the dimension of the third cavity 1123 in the X-axis direction) is greater than the depth dimension of the first cavity 1121 (i.e., the dimension of the first cavity 1121 in the X-axis direction). The projection of the third cavity 1123 in the Z-axis direction (i.e., the third direction) overlaps with the projection of the receiving groove 113 in the Z-axis direction (i.e., the third direction).

[0156] Specifically, the first subshell 11 includes a first cavity wall 111, a second cavity wall 111a, a third cavity wall 111b, a fourth cavity wall 111c, a fifth cavity wall 111d, a sixth cavity wall 111e, a seventh cavity wall 111f, an eighth cavity wall 111g, a ninth cavity wall 111h and a tenth cavity wall 111i. The matching relationship between the first cavity wall 111, the second cavity wall 111a, the third cavity wall 111b, the fourth cavity wall 111c and the fifth cavity wall 111d can be referred to Figure 5 The relevant description of the illustrated embodiment is not repeated here. In the Z-axis direction, the sixth cavity wall 111e is located on one side of the first cavity wall 111 and faces away from the second cavity wall 111a, and the sixth cavity wall 111e is spaced apart from the first cavity wall 111. The sixth cavity wall 111e extends along the X-axis direction. In the X-axis direction, the seventh cavity wall 111f is located on one side of the first cavity wall 111 and faces away from the second cavity wall 111a, and the seventh cavity wall 111f is spaced apart from the first cavity wall 111. In the X-axis direction, the seventh cavity wall 111f is located on one side of the sixth cavity wall 111e and is connected to the sixth cavity wall 111e. The seventh cavity wall 111f extends along the Z-axis direction.

[0157] In the X-axis direction, the ninth cavity wall 111h is located on one side of the first cavity wall 111 and faces the second cavity wall 111a. The ninth cavity wall 111h is connected to the first cavity wall 111. In the Z-axis direction, the ninth cavity wall 111h is located on one side of the first cavity wall 111 and faces the sixth cavity wall 111e, and the ninth cavity wall 111h is spaced apart from the sixth cavity wall 111e. The ninth cavity wall 111h extends along the X-axis direction. In the X-axis direction, the tenth cavity wall 111i is located on one side of the ninth cavity wall 111h and faces away from the first cavity wall 111. And in the X-axis direction, the tenth cavity wall 111i is located on one side of the sixth cavity wall 111e and faces away from the seventh cavity wall 111f. In the Z-axis direction, the tenth cavity wall 111i is located on the sixth cavity wall 111e and the ninth cavity wall 111h. The tenth cavity wall 111i is connected to the sixth cavity wall 111e and the ninth cavity wall 111h. The tenth cavity wall 111 i extends along the Z-axis direction.

[0158] The number of the eighth cavity walls 111g is 2. In the Y-axis direction, one eighth cavity wall 111g is connected to one side of the first cavity wall 111, the second cavity wall 111a, the third cavity wall 111b, the fourth cavity wall 111c, the fifth cavity wall 111d, the sixth cavity wall 111e, the seventh cavity wall 111f, the ninth cavity wall 111h and the tenth cavity wall 111i; the other eighth cavity wall 111g is connected to the other side of the first cavity wall 111, the second cavity wall 111a, the third cavity wall 111b, the fourth cavity wall 111c, the fifth cavity wall 111d, the sixth cavity wall 111e, the seventh cavity wall 111f, the ninth cavity wall 111h and the tenth cavity wall 111i.

[0159] The first cavity wall 111, the second cavity wall 111a, the third cavity wall 111b, the fourth cavity wall 111c, the fifth cavity wall 111d, the sixth cavity wall 111e, the seventh cavity wall 111f, the two eighth cavity walls 111g, the ninth cavity wall 111h and the tenth cavity wall 111i are surrounded to form a receiving cavity 112. The receiving cavity 112 extends along the X-axis direction and has a receiving opening 1120. The first cavity wall 111 and the two eighth cavity walls 111g are surrounded to form a first cavity 1121. The second cavity wall 111a, the third cavity wall 111b, the fourth cavity wall 111c and the two eighth cavity walls 111g are surrounded to form a second cavity 1122. The sixth cavity wall 111e, the tenth cavity wall 111i, the ninth cavity wall 111h and the two eighth cavity walls 111g are surrounded to form a third cavity 1123.

[0160] Thus, the receiving cavity 112 includes a first cavity 1121, a second cavity 1122 and a third cavity 1123. In the Z-axis direction (i.e., the third direction), the second cavity 1122 is located at one side of the first cavity 1121. The second cavity 1122 is connected to the first cavity 1121. In the Z-axis direction (i.e., the third direction), the third cavity 1123 is located at one side of the first cavity 1121 and faces away from the second cavity 1122. The third cavity 1123 is connected to the first cavity 1121. The depth dimension of the second cavity 1122 (i.e., the dimension of the second cavity 1122 in the X-axis direction) is greater than the depth dimension of the first cavity 1121 (i.e., the dimension of the first cavity 1121 in the X-axis direction). The depth dimension of the third cavity 1123 (i.e., the dimension of the third cavity 1123 in the X-axis direction) is greater than the depth dimension of the first cavity 1121 (i.e., the dimension of the first cavity 1121 in the X-axis direction).

[0161] The first cavity wall 111, the second cavity wall 111a and the ninth cavity wall 111h are surrounded to form a receiving groove 113. That is to say, a receiving groove 113 is provided on one side of the first subshell 11. The receiving groove 113 extends along the X-axis direction and has a first opening 1131. In the X-axis direction, the first opening 1131 is opposite to the first cavity 1121, and the first opening 1131 is opposite to the receiving cavity 112. The receiving groove 113 extends along the Y-axis direction and has a second opening 1132. The number of the second openings 1132 is 2, and the two second openings 1132 are arranged opposite to each other. It can be understood that the third opening 1133 of the receiving groove 113 can be omitted.

[0162] The projection of the receiving groove 113 in the X-axis direction overlaps with the projection of the first cavity 1121 in the X-axis direction. In the Z-axis direction, the receiving groove 113 is located between the second cavity 1122 and the third cavity 1123. The projection of the receiving groove 113 in the Z-axis direction overlaps with the projection of the second cavity 1122 in the Z-axis direction and the projection of the third cavity 1123 in the Z-axis direction. In other words, the projection of the third cavity 1123 in the Z-axis direction (i.e., the third direction) overlaps with the projection of the receiving groove 113 in the Z-axis direction (i.e., the third direction).

[0163] In this embodiment, the circuit board 20 is accommodated in the first cavity 1121, the second cavity 1122 and the third cavity 1123. In the X-axis direction, the power module 30 is mounted on one side of the circuit board 20 and faces the first cavity wall 111. The power module 30 is accommodated in the first cavity 1121. The projection of the power module 30 in the X-axis direction overlaps with the projection of the receiving groove 113 in the X-axis direction. In the X-axis direction, the auxiliary module 40 is mounted on one side of the circuit board 20 and faces the power module 30. In the X-axis direction, the auxiliary module 40 is located between the circuit board 20 and the third cavity wall 111b. The auxiliary module 40 is accommodated in the second cavity 1122. The projection of the auxiliary module 40 in the Z-axis direction overlaps with the projection of the receiving groove 113 in the Z-axis direction.

[0164] In the X-axis direction (i.e., the first direction), the capacitor 50 is installed on one side of the circuit board 20 and faces the power module 30. In the X-axis direction, the capacitor 50 is located between the circuit board 20 and the tenth cavity wall 111i. The capacitor 50 is accommodated in the third cavity 1123. The projection of the capacitor 50 in the Z-axis direction (i.e., the third direction) overlaps with the projection of the receiving groove 113 in the Z-axis direction (i.e., the third direction).

[0165] On the basis of ensuring that the power module 30, the auxiliary module 40 and the capacitor 50 can be accommodated in the accommodating cavity 112, the depth dimension of the first cavity 1121 (i.e., the dimension of the first cavity 1121 in the X-axis direction) is adapted to the dimension of the power module 30 in the first direction (i.e., the X-axis direction); the depth dimension of the second cavity 1122 (i.e., the dimension of the second cavity 1122 in the X-axis direction) is adapted to the dimension of the auxiliary module 40 in the first direction (i.e., the X-axis direction); the depth dimension of the third cavity 1123 (i.e., the dimension of the third cavity 1123 in the X-axis direction) is adapted to the dimension of the capacitor 50 in the first direction (i.e., the X-axis direction).

[0166] Compared to Figure 5 In the embodiment shown, the capacitor 50 is accommodated in the third cavity 1123. The design of accommodating the capacitor 50 in the third cavity 1123 can ensure that the projection of the capacitor 50 in the Z-axis direction (i.e., the third direction) overlaps with the projection of the receiving groove 113 in the Z-axis direction (i.e., the third direction), which is beneficial to improving the space utilization of the receiving cavity 112, and is beneficial to reducing the size of the housing 10 in the X-axis direction (i.e., the first direction), which is beneficial to improving the space utilization of the housing 10, and is beneficial to the miniaturized design of the housing 10, and is beneficial to the miniaturized design of the power conversion device 200, and is beneficial to improving the power density of the power conversion device 200.

[0167] In this way, the shape of the accommodating cavity 112 is also compatible with the shape of the circuit board 20, the shape of the power module 30, the shape of the auxiliary module 40 and the shape of the capacitor 50. The accommodating cavity 112 is densely filled with the circuit board 20, the power module 30, the auxiliary module 40 and the capacitor 50, which greatly improves the space utilization of the accommodating cavity 112, is beneficial to improving the space utilization of the shell 10, is beneficial to the miniaturized design of the shell 10, is beneficial to the miniaturized design of the power conversion device 200, and is beneficial to improving the power density of the power conversion device 200.

[0168] In this embodiment, the heat sink 71 and the inductor 60 are received in the receiving groove 113. In the X-axis direction, the air scoop 72 is arranged on one side of the heat sink 71 and faces away from the first sub-shell 11, the air scoop 72 is arranged on one side of the inductor 60 and faces away from the first sub-shell 11, the air scoop 72 covers the outside of the heat sink 71 and the outside of the inductor 60, and the air scoop 72 covers the receiving groove 113. The fan 74 is arranged on one side of the air scoop 72 and faces the heat sink 71. For details, please refer to Figure 5 The relevant description of the illustrated embodiment will not be repeated here.

[0169] In the X-axis direction, the mounting member 73 is disposed on one side of the air guide cover 72 and faces away from the radiator 71. In the X-axis direction, the mounting member 73 is disposed on one side of the first sub-shell 11 and faces away from the accommodating cavity 112. Specifically, in the X-axis direction, the second mating portion 732 of the mounting member 73 is fixedly stacked on one side of the air guide cover 72 and faces away from the radiator 71. In the X-axis direction, the second mating portion 732 is fixedly stacked on one side of the tenth cavity wall 111i and faces away from the third cavity 1123, and the second mating portion 732 is fixedly stacked on one side of the third cavity wall 111b and faces away from the second cavity 1122. In the X-axis direction, the first mating portion 731 faces away from the first sub-shell 11, and the first mating portion 731 faces away from the radiator 71. In this way, the air guide cover 72 is fixedly connected to the first sub-shell 11 through the hanging part 73, so that in the X-axis direction, the air guide cover 72 can be set on one side of the heat sink 71 and face away from the first sub-shell 11, the air guide cover 72 is set on one side of the inductor 60 and faces away from the first sub-shell 11, the air guide cover 72 is covered on the outside of the heat sink 71 and the outside of the inductor 60, and the air guide cover 72 covers the receiving groove 113.

[0170] Compared to Figure 5 In the embodiment shown, in this embodiment, the second matching portion 732 is fixedly stacked with the tenth cavity wall 111i, and the second matching portion 732 is fixedly stacked with the third cavity wall 111b, so that the hanging member 73 is fixedly stacked with the first sub-shell 11. In this way, it is beneficial to increase the contact area between the hanging member 73 and the first sub-shell 11, to increase the connection strength between the hanging member 73 and the first sub-shell 11, and to increase the structural stability of the power conversion device 200.

[0171] Please refer again Figure 4 , Figure 5 as well as Fig.17, an embodiment of the present application provides a power conversion device 200. The power conversion device 200 includes a housing 10, a power module 30 and a heat sink 71. The housing 10 includes a first sub-shell 11 and a second sub-shell 12. The first sub-shell 11 includes a receiving cavity 112, and the receiving cavity 112 extends along the X-axis direction (i.e., the first direction) and has a receiving opening 1120. In the X-axis direction (i.e., the first direction), the second sub-shell 12 is arranged on one side of the first sub-shell 11, and the second sub-shell 12 covers the receiving opening 1120 and closes the receiving cavity 112. The power module 30 is accommodated in the receiving cavity 112. In the X-axis direction (i.e., the first direction), the heat sink 71 is arranged on one side of the first sub-shell 11 and faces away from the second sub-shell 12, and the heat sink 71 is thermally connected to the power module 30. Among them, a receiving groove 113 is provided on one side of the first subshell 11, and the receiving groove 113 extends along the X-axis direction (i.e., the first direction) and has a first opening 1131. In the X-axis direction (i.e., the first direction), the first opening 1131 of the receiving groove 113 is away from the receiving cavity 112, and the heat sink 71 is received in the receiving groove 113.

[0172] In the power conversion device 200 provided in the embodiment of the present application, the heat generated by the power module 30 during operation is transferred to the outside of the housing 10 through the heat sink 71, thereby realizing rapid heat dissipation of the power module 30. Compared with the existing power conversion device 200, the power conversion device 200 provided in the present application, because the heat sink 71 is received in the receiving groove 113, greatly improves the space utilization of the housing 10 on the basis of ensuring the heat dissipation efficiency of the power module 30, is conducive to reducing the size of the power conversion device 200 in the first direction, and is conducive to the miniaturized design of the power conversion device 200.

Claims

1. A power conversion device, characterized in that: The power conversion device comprises: A shell, the shell comprising a first subshell and a second subshell, the first subshell comprising a receiving cavity, the receiving cavity extending along a first direction and having a receiving opening, the second subshell being disposed on one side of the first subshell in the first direction, the second subshell covering the receiving opening and closing the receiving cavity; a power module, the power module being received in the receiving cavity; and A heat sink, in the first direction, the heat sink is arranged on one side of the first sub-shell and faces away from the second sub-shell, and the heat sink is thermally connected to the power module; A receiving groove is provided on one side of the first subshell. The receiving groove extends along the first direction and has a first opening. In the first direction, the first opening of the receiving groove faces away from the receiving cavity. The heat sink is received in the receiving groove.

2. The power conversion device according to claim 1, characterized in that: The first subshell is provided with a first through hole, which penetrates the first subshell along the first direction, is communicated with the receiving cavity and the receiving groove, and the heat sink is exposed in the receiving cavity through the first through hole, and the heat sink is in contact with the power module.

3. The power conversion device according to claim 1, characterized in that: The receiving groove penetrates the first subshell along a second direction and has a second opening. The heat sink is exposed to the outside of the shell through the first opening and the second opening. The second direction is perpendicular to the first direction.

4. The power conversion device according to any one of claims 1 to 3, characterized in that: The power conversion device includes a circuit board and an inductor. The circuit board is accommodated in the accommodating cavity. In the first direction, the circuit board is installed on one side of the power module and faces away from the first sub-shell. The inductor is accommodated in the accommodating groove. The inductor is spaced apart from the heat sink and is electrically connected to the circuit board.

5. The power conversion device according to claim 4, characterized in that: The first subshell is provided with a second through-hole, the second through-hole penetrates the first subshell along the first direction, the second through-hole is communicated with the receiving cavity and the receiving groove, the power conversion device comprises a connecting member, the connecting member passes through the second through-hole, and the connecting member is arranged between the inductor and the circuit board; Alternatively, the inductor passes through the second through hole, and the inductor is plugged into the circuit board.

6. The power conversion device according to claim 4, characterized in that: The inductor includes an inductor shell and an inductor body. A mounting groove is provided on one side of the inductor shell. The mounting groove extends along the first direction and has an opening. In the first direction, the opening of the mounting groove faces the accommodating cavity. The inductor body is accommodated in the mounting groove. The inductor body is electrically connected to the circuit board. The inductor shell is provided with a thermal fin, and the thermal fin is located outside the mounting groove.

7. The power conversion device according to claim 4, characterized in that: The power conversion device includes an auxiliary module. In the first direction, the auxiliary module is installed on one side of the circuit board and faces the power module. The auxiliary module is accommodated in the accommodating cavity. The projection of the auxiliary module in the third direction overlaps with the projection of the accommodating groove in the third direction. The third direction is arranged perpendicular to the first direction.

8. The power conversion device according to claim 7, characterized in that: The receiving cavity includes a first cavity and a second cavity. In the third direction, the second cavity is located on one side of the first cavity and is connected to the second cavity. The depth dimension of the second cavity is greater than the depth dimension of the first cavity. The projection of the first cavity in the first direction overlaps with the projection of the receiving groove in the first direction. The projection of the second cavity in the third direction overlaps with the projection of the receiving groove in the third direction. The power module is received in the first cavity, and the auxiliary module is received in the second cavity.

9. The power conversion device according to claim 8, characterized in that: The power conversion device includes a capacitor. In the first direction, the capacitor is installed on one side of the circuit board and faces the power module. The capacitor is accommodated in the second cavity. The capacitor is spaced apart from the auxiliary module. The projection of the capacitor in the third direction overlaps with the projection of the receiving groove in the third direction.

10. The power conversion device according to claim 8, characterized in that: The receiving cavity includes a third cavity, in the third direction, the third cavity is located at one side of the first cavity and faces away from the second cavity, the third cavity is connected to the first cavity, the depth of the third cavity is greater than the depth of the first cavity, and the projection of the third cavity in the third direction overlaps with the projection of the receiving groove in the third direction; The power conversion device includes a capacitor. In the first direction, the capacitor is installed on one side of the circuit board and faces the power module. The capacitor is accommodated in the third cavity. The projection of the capacitor in the third direction overlaps with the projection of the accommodation groove in the third direction.

11. The power conversion device according to claim 1, characterized in that: The power conversion device includes an air guide cover, which is arranged on one side of the radiator and faces away from the first sub-shell in the first direction, and covers the receiving slot. The air guide cover is provided with an air inlet and an air outlet, and the air inlet extends along the first direction and is connected to the receiving slot. The air outlet extends along the second direction and is connected to the receiving slot, and the second direction is arranged perpendicular to the first direction.

12. The power conversion device according to claim 11, characterized in that: The power conversion device includes a fan. In the first direction, the fan is arranged on one side of the air guide cover and faces the radiator. The fan is spaced apart from the radiator, and the projection of the fan in the first direction overlaps with the projection of the air inlet in the first direction.

13. The power conversion device according to claim 12, characterized in that: A first baffle and a second baffle are provided on one side of the air guide cover. In the first direction, the first baffle and the second baffle are both facing the radiator. In the second direction, the first baffle and the second baffle are located on both sides of the fan and are spaced apart from the fan.

14. The power conversion device according to claim 12, characterized in that: The air guide cover includes a fixed portion and a sliding portion, the sliding portion is slidably connected to the fixed portion along the second direction, in the first direction, the fixed portion is arranged at one side of the radiator and faces away from the first sub-shell, the sliding portion is located between the fixed portion and the radiator, and the air inlet and the air outlet are both arranged at the fixed portion; The sliding part is provided with a ventilation hole, the ventilation hole is connected with the air inlet hole, the fan is arranged on one side of the sliding part and faces away from the fixed part, and the projection of the fan in the first direction overlaps with the projection of the ventilation hole in the first direction.

15. The power conversion device according to claim 14, characterized in that: The fixed portion is provided with a sliding groove, which extends along the second direction. The sliding groove extends along the first direction and has a sliding groove opening. In the first direction, the sliding groove opening faces the radiator. The fixed portion is provided with a matching hole, which penetrates the fixed portion along the second direction. The sliding portion is slidably connected to the sliding groove along the second direction, and the sliding portion is movably installed in the matching hole along the second direction.

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