Power supply module, power supply device and equipment cabinet

Abstract

The embodiment of the utility model relates to the technical field of power supply modules, and particularly discloses a power supply module, a power supply module and an equipment cabinet, and the power supply module comprises a substrate, a first circuit board and a second circuit board. A limiting groove is concavely formed in the side edge of the base plate in the first direction and penetrates through the base plate in the second direction, and the second direction is parallel to the thickness direction of the base plate. The first circuit board is installed on the substrate, the first circuit board is provided with a first power device, the side portion, away from the first circuit board, of the first power device is provided with a protruding portion in the second direction, and a containing space is formed between the protruding portion and the first circuit board in the second direction. The second circuit board is installed on the substrate, the second circuit board and the first power device are arranged at intervals in the first direction, the side portion, in the second direction, of the second circuit board is provided with a limiting column inserted into the limiting groove, and the second circuit board is provided with an electronic device located in the containing space. The embodiment of the utility model is beneficial to the assembly of the power module.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power module, in particular to a power module, a power device and an equipment cabinet. BACKGROUND

[0002] The power module in the related art usually comprises a motherboard, a power module and a PCBA, the power module is mainly used for converting alternating current into direct current, and the power module and the PCBA are both mounted on the motherboard and electrically connected with the motherboard.

[0003] In the related art, in order to fully utilize the three-dimensional space, it is expected to vertically mount the PCBA on the motherboard and weld it, and then mount the power module at a position adjacent to the PCBA, however, this scheme has the problem of inconvenient installation. CONTENT OF THE UTILITY MODEL

[0004] The present application relates to the technical field of power module, in particular to a power module, a power device and an equipment cabinet.

[0005] The present application relates to the technical field of power module, in particular to a power module, a power device and an equipment cabinet.

[0006] According to one aspect of the present application, a power module is provided, comprising: a substrate, a side edge of the substrate is recessed with a limiting slot along a first direction, the limiting slot penetrates through the substrate along a second direction, the first direction is perpendicular to the second direction, and the second direction is parallel to the thickness direction of the substrate; a first circuit board is mounted on the substrate, the first circuit board is provided with a first power device, along the second direction, the first power device is provided with a protruding portion away from the side of the first circuit board, and along the second direction, the protruding portion has an accommodation space with the first circuit board; and a second circuit board is mounted on the substrate, along the first direction, the second circuit board is arranged at intervals with the first power device, a limiting column is arranged on the side of the second circuit board along the second direction, the limiting column is inserted into the limiting slot, and an electronic device is arranged on the second circuit board, and the electronic device is located in the accommodation space.

[0007] In an optional manner, the limiting slot comprises a first part and a second part which are in communication with each other, the first part and the second part are sequentially arranged along the first direction, a part of the second part is arranged in a staggered manner with the first part along a third direction, and the third direction, the first direction and the second direction are perpendicular to each other; the limiting column is inserted into the second part of the limiting slot, and a part of the limiting column is arranged in a staggered manner with the first part along the third direction.

[0008] In an optional manner, along the third direction, the length of the second part is greater than the length of the first part.

[0009] In an alternative way, along the third direction, the width of the limiting column is W, the length of the first part of the limiting groove is W1, the length of the second part of the limiting groove is W2, along the first direction, the thickness of the limiting column is T, the width of the second part is T1, and the power module at least meets one of the following conditions: W+0.1mm≤W1≤W+0.5mm; W2=W1+0.5mm; T+0.15mm≤T1≤T+0.2mm.

[0010] In an alternative way, the first circuit board is further provided with a second power device and a copper bar, and the protruding part and the copper bar are spaced apart to form a part of the accommodating space, and / or the protruding part and the second power device are spaced apart to form a part of the accommodating space.

[0011] In an alternative way, the power module further comprises a shell, the shell is provided with a mounting cavity and a first opening and a second opening communicating with the mounting cavity, along the third direction, the first opening and the second opening are oppositely arranged, the substrate, the first circuit board and the second circuit board are located in the mounting cavity; the substrate is further provided with an input end and an output end, both of which are electrically connected to the substrate, the input end is located in the first opening, and the output end is located in the second opening; the shell is further provided with a first heat dissipation hole and a second heat dissipation hole communicating with the mounting cavity, along the third direction, the first heat dissipation hole and the second heat dissipation hole are oppositely arranged, and the first heat dissipation hole, the mounting cavity and the second heat dissipation hole form a heat dissipation channel therebetween.

[0012] In an alternative way, the power module further comprises a vertical plate, the vertical plate is installed on the substrate, the vertical plate is parallel to the second circuit board, and at least part of the vertical plate is spaced apart from at least part of the second circuit board along the first direction.

[0013] In an alternative way, the first circuit board is parallel to the substrate, and the second circuit board is perpendicular to the substrate.

[0014] In an alternative way, the power module is further provided with a fan assembly, the fan assembly is installed on the substrate and electrically connected to the substrate, and the fan assembly drives the airflow to enter from the first heat dissipation hole and flow out from the second heat dissipation hole.

[0015] In an alternative way, the power module further comprises a capacitor module, the capacitor module is installed on the substrate, and the capacitor module is electrically connected to the substrate.

[0016] In an alternative way, the power module further comprises a PFC inductor module, the PFC inductor module is installed on the substrate, and the PFC inductor module is electrically connected to the substrate.

[0017] In an alternative way, the power module further comprises a common mode inductor module, the common mode inductor module is installed on the substrate, and the common mode inductor module is electrically connected to the substrate.

[0018] According to another aspect of the present application, there is provided a power supply device comprising the power supply module as above.

[0019] According to another aspect of the present application, there is provided a device cabinet comprising the power supply device as above.

[0020] The beneficial effects of the embodiments of the present application are: Different from the related art, the embodiments of the present application are provided with a substrate, a first circuit board and a second circuit board. The side edge of the substrate is recessed with a limiting groove along a first direction, the limiting groove penetrates the substrate along a second direction, the first direction is perpendicular to the second direction, the second direction is parallel to the thickness direction of the substrate, the first circuit board is installed on the substrate, the first circuit board is provided with a first power device, along the second direction, the first power device is provided with a protruding portion away from the side of the first circuit board, along the second direction, the protruding portion and the first circuit board have an accommodation space therebetween, the second circuit board is installed on the substrate, along the first direction, the second circuit board is arranged in a spaced manner with the first power device, the side of the second circuit board along the second direction is provided with a limiting column, the limiting column is inserted into the limiting groove, the electronic device is arranged on the second circuit board, and the electronic device is located in the accommodation space. In this way, the second circuit board can be installed on the substrate along the first direction, and the electronic device is accommodated in the accommodation space when the second circuit board is installed transversely, which is beneficial to reduce the risk of interference between the electronic device and the first power device. When the second circuit board is installed on the substrate, the limiting column on the second circuit board is inserted into the limiting groove from the first direction, and the limiting groove can block the second circuit board from continuing to move towards the first circuit board, so as to limit the distance between the second circuit board and the first circuit board in the first direction within a preset range, and avoid the distance between the first power device on the first circuit board and the electronic device on the second circuit board in the first direction being too close. At the same time, the electronic device on the second circuit board is located in the accommodation space, which can reduce the interference of the first power device on the first circuit board on the electronic device on the second circuit board. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the specific embodiments or the related art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the related art description. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, the elements or parts are not necessarily drawn according to the actual proportions.

[0022] Figure 1 is the overall structure schematic diagram of the power supply module of the embodiments of the present application.

[0023] Figure 2 is the exploded schematic diagram of the power supply module of the embodiments of the present application.

[0024] Figure 3This is a schematic diagram of an exploded view of the power module according to an embodiment of the present application from another angle.

[0025] Figure 4 This is a schematic diagram of the partial structural assembly of the power module of an embodiment of the present application.

[0026] Figure 5 yes Figure 2 A magnified schematic diagram of the structure in the middle.

[0027] Figure 6 It is a schematic diagram of partial structural decomposition of the power module of an embodiment of the present application.

[0028] Figure 7 yes Figure 6 A magnified schematic diagram of the structure at point B in the middle. DETAILED DESCRIPTION

[0029] To facilitate understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it may be directly on the other element, or one or more intervening elements may be present therebetween. When an element is described as being "connected to" another element, it may be directly connected to the other element, or one or more intervening elements may be present therebetween.

[0030] The term "perpendicular" as used herein refers to the ability of two components to be approximately perpendicular to each other. For example, in conjunction with numerical descriptions, perpendicularity may refer to the angle between two straight lines being within a range of 90°±10°, the dihedral angle between two planes being within a range of 90°±10°, and the angle between a straight line and a plane being within a range of 90°±10°.

[0031] The term "parallel" as used in this specification indicates that two components can be approximately parallel. For example, in conjunction with numerical descriptions, parallel can refer to the angle between two lines being within a range of 180°±10°, the dihedral angle between two planes being within a range of 180°±10°, and the angle between a line and a plane being within a range of 180°±10°.

[0032] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification and in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the relevant listed items.

[0033] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0034] In some embodiments, referring to Figure 1 and Figure 2 The power module 1000 includes a substrate 20, a first circuit board 30 mounted on and electrically connected to the substrate 20, and a second circuit board 40 mounted on and electrically connected to the substrate 20.

[0035] In order to better illustrate the structure of the power module 1000, the structure of the power module 1000 will be described in combination with X, Y and Z axes, which are perpendicular to each other. The first direction X is along the X axis direction, the second direction Z is along the Z axis direction, and the third direction Y is along the Y axis direction. The first direction X is defined as parallel to the width direction of the substrate 20, the second direction Z is defined as parallel to the thickness direction of the substrate 20, and the third direction Y is defined as parallel to the length direction of the substrate 20.

[0036] In some embodiments, the side edge of the substrate 20 is recessed to form a limiting groove 201 along the first direction X, and the limiting groove 201 penetrates the substrate 20 along the second direction Z. The limiting groove 201 can be used to limit the movement of the second circuit board 40 along the first direction X towards the first circuit board 30.

[0037] In some embodiments, the first circuit board 30 is provided with a first power device 301, and along the second direction Z, the first power device 301 is provided with a protruding portion 3011 away from the side of the first circuit board 30. Along the second direction Z, the protruding portion 3011 and the first circuit board 30 have an accommodation space 30a therebetween.

[0038] In some embodiments, the first circuit board 30 is parallel to the substrate 20, which facilitates the arrangement of the accommodation space 30a.

[0039] In some embodiments, the first circuit board 30 is further provided with a second power device 302 and a copper bar 303. The protruding portion 3011 and the copper bar 303 are spaced apart to form part of the accommodation space 30a, and / or the protruding portion 3011 and the second power device 302 are spaced apart to form part of the accommodation space 30a.

[0040] In some embodiments, the second circuit board 40 is spaced apart from the first power device 301 along the first direction X, the second circuit board 40 is provided with a limiting column 401 on the side thereof along the second direction Z, the limiting column 401 is inserted into the limiting slot 201, and the second circuit board is provided with an electronic device 40a, which is located in the accommodation space 30a. The accommodation space 30a facilitates the lateral installation of the second circuit board 40 and reduces the risk of interference between the electronic device 40a on the second circuit board 40 and the first power device 301. In some embodiments, the second circuit board 40 is perpendicular to the base plate 20.

[0041] Based on the above embodiments, the side edge of the base plate 20 is recessed to form the limiting slot 201 along the first direction X, the second circuit board 40 is provided with the limiting column 401 on the side thereof along the second direction Z, the second circuit board 40 can be installed on the base plate 20 along the first direction X, and the electronic device 40a can be accommodated in the accommodation space 30a when the second circuit board 40 is installed on the base plate 20, which facilitates reducing the risk of interference between the electronic device 40a and the first power device. When the limiting column 401 on the second circuit board 40 is inserted into the limiting slot 201 along the first direction X, the limiting slot 201 can prevent the second circuit board 40 from moving further in the direction close to the first circuit board 30, thereby limiting the distance between the second circuit board 40 and the first circuit board 30 along the first direction X within a predetermined range, avoiding the distance between the first power device 301 on the first circuit board 30 and the electronic device 40a on the second circuit board 40 along the first direction X being too close, and meanwhile, the electronic device 40a on the second circuit board 40 is located in the accommodation space 30a, which can reduce the interference between the first power device 301 on the first circuit board 30 and the electronic device 40a on the second circuit board 40.

[0042] In some embodiments, the power supply module 1000 comprises a housing 10, and the housing 10 is provided with a mounting cavity 10a for mounting internal components of the power supply module 1000.

[0043] In some embodiments, the power supply module 1000 comprises a fan assembly 50, and the fan assembly 50 is mounted on and electrically connected to the base plate 20.

[0044] In some embodiments, the power supply module 1000 comprises a capacitor module 60, and the capacitor module 60 is mounted on and electrically connected to the base plate 20.

[0045] In some embodiments, the power supply module 1000 comprises a PFC inductor module 70, and the PFC inductor module 70 is mounted on and electrically connected to the base plate 20.

[0046] In some embodiments, the power module 1000 comprises a common mode inductor module 80 mounted on the substrate 20, and electrically connected with the substrate 20.

[0047] In some embodiments, the power module 1000 comprises a stand plate 90 mounted on the substrate 20, and parallel to the second circuit board 40, at least part of the stand plate 90 is spaced apart from at least part of the second circuit board 40 along the first direction X.

[0048] In some embodiments, the substrate 20, the first circuit board 30, the second circuit board 40, the fan assembly 50, the capacitor module 60, the PFC inductor module 70, the common mode inductor module 80 and the stand plate 90 are all located in the housing 10. The first circuit board 30, the second circuit board 40, the fan assembly 50, the capacitor module 60, the PFC inductor module 70, the common mode inductor module 80 and the stand plate 90 are all mounted on the substrate 20, and electrically connected with the substrate 20. Along the third direction Y, the first circuit board 30, the capacitor module 60, the PFC inductor module 70, the fan assembly 50 and the common mode inductor module 80 are sequentially spaced apart, and along the first direction X, the stand plate 90 is parallel to the second circuit board 40.

[0049] In some embodiments, for the above-mentioned housing 10 and the fan assembly 50, as shown in Figures 1-3 The housing 10 is provided with a mounting cavity 10a, and a first heat dissipation hole 101 and a second heat dissipation hole 102 communicating with the mounting cavity 10a. Along the third direction Y, the first heat dissipation hole 101 and the second heat dissipation hole 102 are oppositely arranged, and a heat dissipation channel (not shown) is formed among the first heat dissipation hole 101, the mounting cavity 10a and the second heat dissipation hole 102. The heat generated by the electronic components located in the mounting cavity 10a can be dissipated through the heat dissipation channel, thereby achieving heat dissipation for the inside of the power module 1000 and ensuring the normal operation of the power module 1000. The fan assembly 50 is located in the mounting cavity 10a, and the fan assembly 50 is used to drive the airflow to enter from the first heat dissipation hole 101 and flow out from the second heat dissipation hole 102. The fan assembly 50 can accelerate the flow of air, and the flowing air can transport the heat generated inside the power module 1000 to the outside, thereby achieving rapid heat dissipation for the power module 1000.

[0050] In some embodiments, the housing 10 is further provided with a first opening 103 and a second opening 104 communicating with the mounting cavity 10a, and along the third direction Y, the first opening 103 and the second opening 104 are oppositely arranged. The first opening 103 is used for mounting the input end 203 on the substrate 20, and the second opening 104 is used for mounting the output end 204 on the substrate 20; or the first opening 103 is used for mounting the output end 204 on the substrate 20, and the second opening 104 is used for mounting the input end 203 on the substrate 20.

[0051] In some embodiments, for the substrate 20, the first circuit board 30 and the second circuit board 40, as shown in FIG. Figures 2-4 As shown, a first circuit board 30 and a second circuit board 40 are both mounted on a substrate 20 and electrically connected to the substrate 20. The first circuit board 30 is provided with a first power device 301. The second circuit board 40 is spaced apart from the first power device 301 along a first direction X. Optionally, the first circuit board 30 is a synchronous rectifier module, whose primary function is to convert alternating current into direct current, and the second circuit board 40 is a resonant capacitor module 60, which primarily functions to achieve instantaneous voltage boosting and adjust the resonant frequency of the circuit.

[0052] In some embodiments, the number of limiting grooves 201 and limiting columns 401 can be multiple, and the multiple limiting grooves 201 are arranged at intervals along the third direction Y, and the multiple limiting columns 401 are arranged at intervals along the third direction Y, which is conducive to making the second circuit board 40 more stably limited on the substrate 20.

[0053] In some embodiments, the first circuit board 30 is parallel to the substrate 20 , and the second circuit board 40 is perpendicular to the substrate 20 .

[0054] In some embodiments, please refer to Figure 5 The limiting groove 201 includes a first part 201a and a second part 201b that are connected to each other. The first part 201a and the second part 201b are arranged in sequence along the first direction X. A part of the second part 201b is staggered with the first part 201a along the third direction Y. The limiting column 401 is inserted into the second part 201b of the limiting groove 201. Along the third direction Y, a part of the limiting column 401 is staggered with the first part 201a. The second part 201b can clamp the limiting column 401. The provision of the second part 201b can prevent the second circuit board 40 from withdrawing from the notch of the limiting groove 201 along the first direction X, thereby facilitating the subsequent welding and fixation of the second circuit board 40.

[0055] In some embodiments, along the third direction Y, the length of the second portion 201 b is greater than the length of the first portion 201 a .

[0056] In some embodiments, please refer to Figure 6 and Figure 7, along the third direction Y, the width of the limiting column 401 is W, the length of the first part 201a of the limiting groove 201 is W1, and W+0.1mm≤W1≤W+0.5mm, so that the gap between the first part 201a of the limiting groove 201 and the limiting column 401 is not too large, which is beneficial to improve the limiting effect of the limiting groove 201 on the limiting column 401, improve the accuracy of the installation position, and reduce the shaking during installation; and the gap between the first part 201a of the limiting groove 201 and the limiting column 401 is not too small, which is beneficial to the extension of the limiting column 401 into the first part 201a of the limiting groove 201, and improves the smoothness of the installation.

[0057] In some embodiments, please refer to Figure 6 and Figure 7 , along the third direction Y, the length of the second part 201b of the limiting groove 201 is W2, and W2=W1+0.5mm. In this way, the second part 201b and the first part 201a have a certain misalignment space in the first direction X, which can avoid the second circuit board 40 from exiting the slot of the limiting groove 201 in the first direction X, and will not make the misalignment space too large, which is beneficial to reduce the risk of interference between the electronic device 40a and other components

[0058] In some embodiments, please refer to Figure 6 and Figure 7 , along the first direction X, the thickness of the limiting column 401 is T, and the width of the second part 201b is T1, and T+0.15mm≤T1≤T+0.2mm, so that the gap between the second part 201b and the limiting column 401 is not too large, which is beneficial to improve the limiting effect of the limiting groove 201 on the limiting column 401, improve the accuracy of the installation position, and reduce the shaking of the limiting column 401 in the first direction X; and the gap between the second part 201b and the limiting column 401 is not too small, which is beneficial to the extension of the limiting column 401 into the second part 201b, and improves the smoothness of the installation of the limiting column 401.

[0059] In some embodiments, the power module 1000 at least meets one of the following conditions: 2mm≤W≤4mm, W1=W+0.1-0.5mm; W2=W1+0.5mm; T1=T+0.15-0.2mm, for example: W=2mm, W1=2.1mm, W2=2.6mm, T=1mm, T1=1.15mm.

[0060] In some embodiments, the distance from the notch of the first portion 201a to the groove bottom of the second portion 201b is L, the length of L depends on the relative position of the second circuit board 40 and the first circuit board 30 along the width direction of the base plate 20, which can not be specifically limited in the present application, and the user can set it according to actual needs. Optionally, the second circuit board 40 is located near the center point of the base plate 20, and along the first direction X, the second circuit board 40 deviates from the center point of the base plate 20 by 0.05mm.

[0061] In some embodiments, the base plate 20 is also provided with an input end 203 and an output end 204, both of which are electrically connected to the base plate 20. The input end 203 is located at the first opening 103, and the output end 204 is located at the second opening 104. The input end 203 can be used to externally connect other power supply equipment, and the output end 204 can be used to externally connect other power consumption equipment.

[0062] In some embodiments, for the above-mentioned capacitor module 60, PFC inductor module 70, common mode inductor module 80 and stand plate 90, as shown in Figure 2 and Figure 3 The capacitor module 60, the PFC inductor module 70, the common mode inductor module 80 and the stand plate 90 are all located in the mounting cavity 10a, and are all mounted on the base plate 20 and electrically connected thereto. Among them, the capacitor module 60 can play the roles of filtering, energy storage, voltage maintenance, noise reduction, etc., the PFC inductor module 70 can play the roles of improving the power factor in the circuit, reducing the reactive power in the circuit, and improving the power conversion effect, and the common mode inductor module 80 can play the role of filtering electromagnetic interference signals.

[0063] In some embodiments, along the first direction X, the stand plate 90 is parallel to the second circuit board 40.

[0064] In some embodiments, the stand plate 90 includes a third circuit board 901 and an auxiliary source plate 902, both of which are mounted on the base plate 20 and electrically connected thereto. The third circuit board 901 can be a control circuit board, and the auxiliary source plate 902 can be used to provide the required electric energy for the control, protection and monitoring equipment.

[0065] In the embodiment of the present application, the substrate 20, the first circuit board 30 and the second circuit board 40 are arranged. The side edge of the substrate 20 is recessed with a limiting groove 201 along the first direction X, the limiting groove 201 penetrates the substrate 20 along the second direction Z, the first circuit board 30 is installed on the substrate 20, the first circuit board 30 is provided with a first power device 301, along the second direction Z, the first power device 301 is provided with a protruding portion 3011 away from the side of the first circuit board 30, along the second direction Z, the protruding portion 3011 and the first circuit board 30 have an accommodation space 30a therebetween, the second circuit board 40 is installed on the substrate 20, along the first direction X, the second circuit board 40 is arranged apart from the first power device 301, the side of the second circuit board 40 along the second direction Z is provided with a limiting column 401, the limiting column 401 is inserted into the limiting groove 201, the second circuit board 40 is provided with an electronic device 40a, and the electronic device 40a is located in the accommodation space 30a. In this way, when the second circuit board 40 is installed on the substrate 20, the limiting column 401 on the second circuit board 40 is inserted into the limiting groove 201 from the first direction X, the limiting groove 201 can block the second circuit board 40 from continuing to move towards the direction close to the first circuit board 30, so as to limit the distance between the second circuit board 40 and the first circuit board 30 in the first direction X within a predetermined range, avoiding the distance between the first power device 301 on the first circuit board 30 and the electronic device 40a on the second circuit board 40 in the first direction X from being too close, and at the same time, the electronic device 40a on the second circuit board 40 is located in the accommodation space 30a, which can reduce the interference of the first power device 301 on the first circuit board 30 on the electronic device 40a on the second circuit board 40.

[0066] The present application also provides an embodiment of a power supply device, which comprises the power supply module 1000 as above, and the functions and structures of the power supply module 1000 can be referred to the above embodiments, which will not be repeated here.

[0067] The present application also provides an embodiment of an equipment cabinet, which comprises the power supply device as above, and the functions and structures of the power supply device can be referred to the above embodiments, which will not be repeated here.

[0068] The above is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings of the present application, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A power module, characterized by The power module comprises: a substrate, a side edge of the substrate is recessed with a limiting groove along a first direction, the limiting groove penetrates through the substrate along a second direction, the first direction is perpendicular to the second direction, and the second direction is parallel to a thickness direction of the substrate; a first circuit board mounted on the substrate, the first circuit board is provided with a first power device, along the second direction, the first power device is provided with a protruding portion away from a side of the first circuit board, and along the second direction, the protruding portion and the first circuit board have an accommodation space therebetween; a second circuit board mounted on the substrate, along the first direction, the second circuit board is arranged to be spaced apart from the first power device, a side of the second circuit board along the second direction is provided with a limiting column, the limiting column is inserted into the limiting groove, and the second circuit board is provided with an electronic device, and the electronic device is located in the accommodation space.

2. The power module according to claim 1, wherein: the limiting groove comprises a first part and a second part which are in communication with each other, the first part and the second part are sequentially arranged along the first direction, and a part of the second part is arranged to be staggered with the first part along a third direction, the third direction, the first direction and the second direction are perpendicular to each other in pairs; the limiting column is inserted into the second part of the limiting groove, and along the third direction, a part of the limiting column is arranged to be staggered with the first part.

3. The power module according to claim 2, wherein: along the third direction, the length of the second part is greater than the length of the first part.

4. The power module according to claim 2, wherein: along the third direction, the width of the limiting column is W, the length of the first part of the limiting groove is W1, the length of the second part of the limiting groove is W2, along the first direction, the thickness of the limiting column is T, the width of the second part is T1, and the power module at least meets one of the following conditions: W+0.1mm≤W1≤W+0.5mm; W2=W1+0.5mm; T+0.15mm≤T1≤T+0.2mm.

5. The power module according to claim 2, wherein: the power module further comprises a shell, the shell is provided with a mounting cavity and a first opening and a second opening which are in communication with the mounting cavity, along the third direction, the first opening and the second opening are arranged to be opposite to each other, and the substrate, the first circuit board and the second circuit board are located in the mounting cavity; the substrate is further provided with an input end and an output end, the input end and the output end are electrically connected to the substrate, the input end is located in the first opening, and the output end is located in the second opening; the shell is further provided with a first heat dissipation hole and a second heat dissipation hole which are in communication with the mounting cavity, along the third direction, the first heat dissipation hole and the second heat dissipation hole are arranged to be opposite to each other, and the first heat dissipation hole, the mounting cavity and the second heat dissipation hole form a heat dissipation channel therebetween.

6. The power module according to claim 2, wherein: The power module further includes a stand plate mounted to the substrate, the stand plate being parallel to the second circuit board, at least a portion of the stand plate being spaced apart from at least a portion of the second circuit board in the first direction.

7. The power module according to any one of claims 1 to 6, wherein the first circuit board is parallel to the substrate, and the second circuit board is perpendicular to the substrate.

8. The power module according to any one of claims 1 to 6, wherein the first circuit board further includes a second power device and a copper bar, a portion of the protrusion being spaced apart from the copper bar to form the portion of the accommodation space, and / or a portion of the protrusion being spaced apart from the second power device to form the portion of the accommodation space.

9. A power supply device characterized by comprising: A power module as claimed in any one of claims 1 to 8.

10. An apparatus cabinet characterized by A power device as claimed in claim 9.

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