CN219576839U - Power module and power supply system - Google Patents

Abstract

The application provides a power module and a power supply system. The power module includes a circuit board, a terminal, and a first fastener. The terminal comprises a shell and a first electrode plate, the first electrode plate is embedded on the shell, the first electrode plate comprises a first electric connection end, and the first electric connection end is exposed relative to the outer surface of the shell. The first fastener passes through the circuit board and is locked on the shell, and the first electric connection end is electrically connected with the first wiring of the circuit board through the contact or conductive piece.

Description

Power module and power supply system

Technical Field

The present disclosure relates to electrical devices, and particularly to a power module and a power supply system.

Background

With the rapid development of technology, a variety of electrical devices have become an indispensable part of daily work and life. Power modules are a common structure in electrical devices. Because power module includes circuit board, output terminal and connecting terminal, connecting terminal's one end electricity is connected the circuit board, and output terminal is connected to the other end electricity to realize output terminal electricity and connect the circuit board, because connecting terminal needs great space setting, lead to power module's volume great, power module's application scene is restricted.

Disclosure of Invention

The utility model provides a power module with smaller volume and a power supply system.

In a first aspect, an embodiment of the present utility model provides a power module. The power module includes a circuit board, a terminal, and a first fastener. The terminal comprises a shell and a first electrode plate, the first electrode plate is embedded on the shell, the first electrode plate comprises a first electric connection end, and the first electric connection end is exposed relative to the outer surface of the shell. The first fastener passes through the circuit board and is locked on the shell, and the first electric connection end is electrically connected with the first wiring of the circuit board through the contact or conductive piece.

It can be understood that compared with the scheme that the connecting terminal is welded on the circuit board, and the circuit board is electrically connected with the first electrode plate through the connecting terminal, the first wiring in the circuit board is directly connected through the first electric connecting end of the first electrode plate, so that on one hand, the space for arranging the connecting terminal originally can be saved, and the size of the power module is reduced; on the other hand, the installation steps can be simplified, and the cost is saved. In addition, compare with the scheme that circuit board and terminal are fixed through modes such as gluing, through first fastener locking circuit board and terminal, the joint strength of circuit board and terminal is more, has reduced circuit board and terminal and has received the exogenic action to take place the aversion, and leads to the risk of disconnection of electricity between terminal and the circuit board. And in the assembly process, the first fastener is used for locking, so that the requirement on the precision of alignment tolerance between the circuit board and the terminal is low, and the assembly efficiency is improved.

In one possible implementation, the first fastener passes through the first electrical connection and the first trace.

It can be appreciated that the first fastener directly passes through the first electrical connection end and the first wire, and can directly apply a force to the first electrical connection end and the first wire, so that the connection between the first wire of the circuit board and the first electrical connection end is tighter, and the reliability of the electrical connection between the first electrical connection end and the circuit board is ensured. When the first fastener is a conductive material, the first fastener may also be used to assist in through-flow.

In one possible implementation, the terminal further includes a nut embedded on the housing, and the first fastener passes through the first electrical connection end and the first trace and is locked with the nut.

It will be appreciated that the nut is embedded in the housing of the terminal for locking with the first fastener, thereby enhancing the reliability of the connection of the first fastener to the terminal without affecting the first electrical connection of the first electrical connection terminal to the first trace of the circuit board by contact or conductive members.

In one possible implementation, the circuit board includes a first insulating layer located on a side of the first trace proximate to the terminal. The first insulating layer is provided with a through hole, the first wiring is exposed out of the through hole, and the first electric connection end is electrically connected with the first wiring in the through hole through contact or a conductive piece.

It is understood that the first insulating layer may provide insulating protection to the first trace. The first wiring is protected from being damaged by external force, and meanwhile, the first wiring is prevented from being leaked.

In one possible implementation, the first electrical connection terminal includes a protrusion, at least a portion of the protrusion being located within the via, the protrusion electrically connecting the first trace through a contact.

It will be appreciated that the provision of the protrusions may form a stepped surface at the first electrical connection end surface. When the first electric connection end is connected with the first wiring through the convex part, the first insulation layer can be prevented from obstructing the first electric connection end, and the contact area between the first electric connection end and the first wiring is effectively increased. The risk of poor contact between the first electric connection end and the first wiring can be reduced, and unnecessary loss can be reduced, and local heating can be avoided.

In one possible implementation, the first electrical connection terminal further includes a body portion, the protruding portion is connected to a side of the body portion, which is close to the circuit board, and a portion of the body portion is disposed opposite to the first insulating layer.

In one possible implementation, the first electrical connection terminal further includes a body portion, the protrusion is connected to a side of the body portion adjacent to the circuit board, and the protrusion and the body portion are both located in the through hole.

In one possible implementation, the plane of the first insulating layer is a first plane, and a projection of the first electrical connection end on the first plane coincides with a projection of the first electrical connection end on the first plane of the via hole.

It can be understood that the surface of the first electric connection end of the first electrode plate far away from one side of the shell can be completely connected and positioned on the first wiring, so that the first electrode plate is prevented from being blocked by the first insulating layer, and the contact area between the first electrode plate and the first wiring in the first wiring layer is increased.

In one possible implementation, when the first electrical connection terminal is electrically connected to the first trace through the conductive member, the thickness of the conductive member is greater than or equal to the thickness of the first insulating layer.

It is understood that the first electrical connection terminal may be electrically connected to the first trace of the circuit board through the conductive member. The first electric connection end is not hindered by the first insulating layer when being connected with the first wiring. The contact area between the first electric connection end and the first wiring is increased. The risk of poor contact between the first electric connection end and the first wiring can be reduced, and unnecessary loss can be reduced, and local heating can be avoided.

In one possible implementation manner, the first electrode slice further includes a second electrical connection end and a third electrical connection end, and the second electrical connection end of the first electrode slice and the third electrical connection end of the first electrode slice are exposed from the outer surface of the housing and are disposed at intervals. The terminal also comprises a second electrode plate and a third electrode plate, wherein the second electrode plate and the third electrode plate are embedded on the shell at intervals, and the second electric connection end of the second electrode plate and the second electric connection end of the third electrode plate are exposed out of the outer surface of the shell. The second electric connection end of the first electrode plate and the second electric connection end of the second electrode plate form a first interface, and the third electric connection end of the first electrode plate and the second electric connection end of the third electrode plate form a second interface.

Wherein the first electrode sheet may be a positive electrode, and the second electrode sheet and the third electrode sheet may be negative electrodes. Or the first electrode sheet may be a negative electrode, and the second electrode sheet and the third electrode sheet may be positive electrodes.

It will be appreciated that when the terminal is an output terminal, it is possible to realize forming a plurality of interfaces for connecting a load on the output terminal by controlling the number of electrical connection terminals for connecting the load in the first electrode tab and the number of electrode tabs included in the output terminal. In this case, the plurality of interfaces share the positive electrode or the negative electrode. The connecting mode can reduce the number of flat cables inside the output terminal on one hand and further reduce the volume of the output terminal while the shunt power-down of the output terminal is not influenced, and on the other hand, under the condition that the volume of the shell of the output terminal is limited, a plurality of interfaces are arranged on one output terminal, so that the power density of the power module is improved. In addition, the contact point between the output terminal and the circuit board can be reduced, the wiring structure is simplified, and the wiring efficiency can be accelerated.

The output terminal is powered down in a shunt way, namely, the output terminal can independently control the connection and disconnection of the output terminal and any one of a plurality of loads. When the areas of the two power modules for setting the output terminals are the same, the power density is higher for the power modules with more interfaces.

In one possible implementation manner, the first electrode slice further includes a second electrical connection end and a third electrical connection end, and the second electrical connection end of the first electrode slice and the third electrical connection end of the first electrode slice are exposed from the outer surface of the housing and are disposed at intervals. The terminal also comprises a second electrode plate, the second electrode plate is embedded on the shell, and the second electric connection end of the second electrode plate and the third electric connection end of the second electrode plate are exposed from the outer surface of the shell respectively and are arranged at intervals. The second electric connection end of the first electrode plate and the second electric connection end of the second electrode plate form a first interface, and the third electric connection end of the first electrode plate and the third electric connection end of the second electrode plate form a second interface.

Wherein the first electrode sheet may be a positive electrode and the second electrode sheet may be a negative electrode. Or the first electrode sheet may be a negative electrode and the second electrode sheet may be a positive electrode.

It can be understood that when the terminal is an output terminal, the first interface and the second interface share the positive electrode and the negative electrode at the same time, and compared with the scheme of sharing the positive electrode or the negative electrode, on one hand, on the premise of not reducing the interfaces, the number of electrode plates inside the shell of the output terminal can be further reduced, the volume of the terminal is reduced, and on the other hand, under the condition that the volume of the shell of the output terminal is limited, the number of the interfaces on the output terminal can be increased, so that the power density of the power module is improved.

In one possible implementation, the power module further includes a housing including a side wall and a bottom wall, a portion of the terminals being located inside the housing and another portion being exposed outside the housing through the side wall. The circuit board is located on a side of the terminal away from the bottom wall.

It can be appreciated that, on the one hand, the shell can provide protection for the circuit board and a part of the terminal, and on the other hand, the circuit board is located on one side of the terminal away from the bottom wall, and in the direction of the vertical and bottom wall, the circuit board can be partially overlapped with the output terminal, so that the area of the power module in the direction parallel to the bottom wall can be reduced, and the size of the power module is miniaturized.

In one possible implementation, the terminal includes an extension block connected to a side of the housing remote from the side wall, the extension block being located inside the housing, the extension block being fixedly connected to the bottom wall.

It will be appreciated that the side wall is oriented longitudinally to the extension block and that the extension block connects the side of the housing remote from the side wall without increasing the lateral width of the terminal. In addition, under the condition of limited space, more terminals can be arranged transversely, so that the power density of the power module is improved. Furthermore, the extension block may also reduce the risk of the terminal being shifted longitudinally during assembly.

In one possible implementation, the power module further includes a second fastener passing through the extension block and fixedly attached to the bottom wall.

It will be appreciated that the second fastener has better strength of connection and lower accuracy requirements for alignment prior to assembly than by gluing, etc., reducing the risk of the terminals being deflected during assembly.

In one possible implementation, the bottom wall further includes a protrusion, the terminal is provided with an avoidance space near one side of the bottom wall, at least part of the protrusion is located in the avoidance space, and the extension block is connected with the protrusion. The power module further comprises an electronic element, the electronic element is connected with the circuit board, and the electronic element and the bulge are arranged oppositely.

It can be understood that when the electronic component radiates heat through the shell, the distance between the bottom wall and the electronic component on the circuit board can be shortened by arranging the bulge, and then the heat generated by the operation of the electronic component can be more rapidly transferred to the bottom wall of the shell and radiated to the outside, so that the electronic component can be favorably and rapidly radiated out of the power module, and the influence on the operation of the power module caused by overhigh temperature of the electronic component is avoided. Meanwhile, at least part of the bulge is positioned in the avoidance space, the terminal can be at least partially overlapped with the bulge in the direction parallel to the body of the bottom wall, and compared with the scheme that the terminal is completely positioned on one side of the bulge close to the side wall, the avoidance space is arranged to be beneficial to the miniaturization of the power module.

In one possible implementation, the electronic component is attached to a side of the circuit board adjacent to the bottom wall.

It will be appreciated that when the electronic component dissipates heat through the housing, the distance between the electronic component and the bottom wall can be further reduced by connecting the electronic component to the side of the circuit board adjacent to the bottom wall than by connecting the electronic component to the side of the circuit board remote from the bottom wall. In the working process of the circuit board assembly, heat generated by the electronic element can be quickly transferred to the shell, and the shell is used for radiating, so that the radiating efficiency is improved, and the influence on the working performance of the circuit board assembly due to overhigh working temperature is avoided.

In one possible implementation, the terminal further includes a seal ring located between the side wall and the terminal, the seal ring for sealing a gap between the terminal and the side wall.

It can be understood that compared with the scheme that the output terminal is fixed on the side wall through the flange, and then the sealing piece is arranged between the flange and the side wall for waterproofing, the sealing ring is arranged between the side wall and the terminal, the gap between the terminal and the shell is sealed, the area on the side wall is not required to be occupied, the area originally used for arranging the flange can be saved for arranging the terminal, and then the terminal density on the side wall can be effectively improved. When the terminal is an output terminal, the power density of the power module is improved.

In a second aspect, an embodiment of the present application provides a power supply system. The power supply system comprises a power supply and a power module, wherein the power module is electrically connected with the power supply.

It will be appreciated that the power supply system may be used to power a load. The power module is small in size, the power supply system is small in size, the space limitation is less, and the power supply system can be applied to more scenes.

Drawings

In order to describe the technical solution of the embodiment of the present application, the drawings required to be used in the embodiment of the present application will be described below.

FIG. 1 is a schematic diagram of one implementation of a power supply system provided by the present embodiment;

FIG. 2 is a schematic diagram of one implementation of the power module provided by the present embodiment;

FIG. 3 is a schematic view of a portion of the power module shown in FIG. 2 at another angle;

FIG. 4 is a partial schematic diagram of one embodiment of the power module shown in FIG. 2;

FIG. 5 is a schematic diagram of an embodiment of the output terminal shown in FIG. 4;

fig. 6 is a schematic view of the structure of the output terminal shown in fig. 5 at another angle;

FIG. 7 is a schematic diagram of one embodiment of the wire shown in FIG. 5;

FIG. 8 is a schematic view of the wire shown in FIG. 7 at another angle;

FIG. 9 is a schematic partial cross-sectional view of an embodiment of the power module shown in FIG. 4;

FIG. 10 is a schematic diagram of an embodiment of the output terminal connection circuit board assembly shown in FIG. 9;

FIG. 11 is a schematic view of the output terminal connection circuit board assembly shown in FIG. 9 at another angle;

FIG. 12 is a schematic partial cross-sectional view of an embodiment of the power module shown in FIG. 4;

fig. 13 is a schematic structural view of still another embodiment of the output terminal connection circuit board assembly shown in fig. 9;

FIG. 14 is a schematic diagram of one embodiment of a via of the first insulating layer in the circuit board shown in FIG. 13;

fig. 15 is a schematic structural view of still another embodiment of the output terminal connection circuit board assembly shown in fig. 9;

fig. 16 is a schematic structural view of another embodiment of the output terminal connection circuit board assembly shown in fig. 9.

Detailed Description

In describing embodiments of the present application, it should be noted that the term "coupled" should be interpreted broadly, unless otherwise explicitly stated and defined, for example, the term "coupled" may be either detachably coupled or non-detachably coupled; may be directly connected or indirectly connected through an intermediate medium. References to orientation terms, such as "upper" or "lower," in embodiments of the present application are only with reference to the orientation of the accompanying drawings, and thus, the use of orientation terms is intended to better and more clearly describe and understand embodiments of the present application, rather than to indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting embodiments of the present application. In the following, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as implying or implying relative importance or as implying a number of such features. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In addition, a plurality means at least two.

Embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

Fig. 1 is a schematic diagram of an implementation of a power supply system 1000 according to an embodiment of the present application.

As shown in fig. 1, an embodiment of the present application provides a power supply system 1000. The power supply system 1000 may be a blade power supply system, a charging pile of an electric automobile, or an energy storage system. The power supply system 1000 of the embodiment shown in fig. 1 is described by taking a blade power supply system as an example.

The power supply system 1000 may include a power module 100 and a power supply 200. The power module 100 is electrically connected to a power supply 200. The power source 200 may be an external power grid or a battery. The power supply 200 may output alternating current or direct current.

In some embodiments, the power supply system 1000 may be electrically connected to the load 2000 for providing the load 2000 with the current required for operation. The load 2000 may be any device requiring power, and the load 2000 may be a server for 5G signals, such as a remote radio unit (Remote Radio Unit, RRU), baseband unit (Building Base band Unit, BBU), etc. The load 2000 may also be an electric vehicle or an electrical storage device (e.g., a battery).

The power module 100 may be used to process the current output by the power supply 200 such that the current output by the power supply 200 is converted into an operating current suitable for the load 2000. The power module 100 may be an ac/dc module (Alternat Current distribution box, ACDC) or a dc/dc module (direct current distribution box, DCDC).

In some embodiments, the power supply 200 may include an external power grid 210 and a lithium battery 220. The lithium battery 220 can be used as a standby power source of the power module 100, and when the external power grid 210 is temporarily unable to supply power, the lithium battery 220 can output current to the power module 100, so as to ensure the normal operation of the load 2000.

In some embodiments, the power module 100 may also charge the lithium battery 220, in which case the lithium battery 220 may be the load 2000 as the power module 100.

In some embodiments, the power module 100 may connect multiple loads 2000 simultaneously.

Fig. 2 is a schematic diagram of an implementation of the power module 100 provided in this embodiment. Fig. 3 is a schematic view of a portion of the power module 100 shown in fig. 2 at another angle. The power module 100 of the embodiment shown in fig. 2 is described by taking an alternating current-direct current (ACDC) module as an example. In a blade power supply system, the power module 100 may be referred to as a blade power supply.

As shown in fig. 2 and 3, the power module 100 may include a housing 10, a circuit board assembly 20, and terminals 90. In some embodiments, the terminals 90 may include an output terminal 30 and an input terminal 40.

The circuit board assembly 20 may be disposed inside the housing 10. Illustratively, the housing 10 may include a side wall 11 and a bottom wall 12. The side wall 11 is connected with the bottom wall 12, and the side wall 11 and the bottom wall 12 enclose a containing space 13. The circuit board assembly 20 may be disposed in the accommodating space 13.

In some embodiments, the sidewalls 11 may include a first sidewall 111, a second sidewall 112, a third sidewall 113, and a fourth sidewall 114. Wherein the first sidewall 111 and the third sidewall 113 are spaced apart and disposed opposite to each other, and the second sidewall 112 and the fourth sidewall 114 are spaced apart and disposed opposite to each other. The first side wall 111 and the third side wall 113 are connected between the second side wall 112 and the fourth side wall 114. The first side wall 111, the second side wall 112, the third side wall 113, the fourth side wall 114 and the bottom wall 12 define the accommodating space 13.

In some embodiments, the housing 10 may also include a cover plate 14. The cover plate 14 is located on a side of the side wall 11 remote from the bottom wall 12. The cover plate 14 is spaced from and disposed opposite the bottom wall 12. The cover 14 connects the first side wall 111, the second side wall 112, the third side wall 113 and the fourth side wall 114. The first side wall 111, the second side wall 112, the third side wall 113, the fourth side wall 114, the bottom wall 12, and the cover 14 can jointly enclose the accommodating space 13.

It can be appreciated that when the power module 100 is applied to an outdoor environment, the cover 14, the first side wall 111, the second side wall 112, the third side wall 113, the fourth side wall 114 and the bottom wall 12 form a housing 10 with good sealing performance, so that external dust, leaves and other pollutants can be effectively prevented from entering the accommodating space 13 to interfere with the operation of the circuit board assembly 20.

In some embodiments, the power module 100 may not be provided with the housing 10.

As shown in fig. 2 and 3, the sidewall 11 may be provided with a first through hole 15. The first through hole 15 may communicate the accommodating space 13 with the outside of the case 10. The output terminal 30 may be partially located in the accommodating space 13 inside the housing 10, and partially may be exposed to the outside of the housing 10 through the sidewall 11 through the first through hole 15.

The number of the output terminals 30 may be one or a plurality. The number of output terminals 30 is equal to the number of first through holes 15. When the number of the output terminals 30 is plural, the plural output terminals 30 are arranged at intervals.

In some embodiments, the number of the first through holes 15 may be 4 as shown in fig. 3, and the number of the output terminals 30 is also 4. In other embodiments, the number of the first through holes 15 may be 7, and the number of the output terminals 30 may be 7.

In some embodiments, the sidewall 11 may also be provided with a second through hole 16. The first through holes 15 are spaced apart from the second through holes 16. The second through hole 16 may communicate the receiving space 13 with the outside of the housing 10. The input terminal 40 may be partially located in the accommodating space 13 inside the housing 10, and partially may be exposed outside the housing 10 through the sidewall 11 through the second through hole 16.

The number of the input terminals 40 may be one or a plurality. The number of input terminals 40 is equal to the number of second through holes 16. When the number of the input terminals 40 is plural, the plural input terminals 40 are arranged at intervals. The number of input terminals 40 may be equal to or different from the number of output terminals 30.

In some embodiments, the number of first through holes 15 is 7, and the number of output terminals 30 is 7. The number of second through holes 16 is one, and the number of input terminals 40 is also one.

In some embodiments, both the output terminal 30 and the input terminal 40 may pass through the first sidewall 111 to be exposed to the outside of the case 10. The surface of the first sidewall 111 on the side away from the receiving space 13 may be provided as a power distribution panel of the power module 100.

In some embodiments, the input terminals 40 may be electrically connected to the power source 200 while electrically connecting to the circuit board assembly 20. The output terminals 30 may be electrically connected to the load 2000 while being electrically connected to the circuit board assembly 20. Accordingly, the output terminal 30 may also be referred to as a load terminal.

In some embodiments, when the power supply 200 is used to provide ac power, the circuit board assembly 20 may be used to convert ac power received by the input terminals 40 into dc power required by the load 2000. Thus, when the power module 100 is operated, ac power may flow into the circuit board assembly 20 through the input terminal 40, and the circuit board assembly 20 may convert the ac power into dc power, and the dc power may flow out to the load 2000 through the output terminal 30.

In some embodiments, power source 200 may be an external power grid. The input terminal 40 may be used to access a 220V high voltage ac power supply in an external power grid. The circuit board assembly 20 may convert 220V high voltage ac power received by the input terminal 40 into 48V dc power. The output terminal 30 may output 48V direct current to the load 2000. It is understood that the power of the ac power and the power of the dc power output by the power module 100 can be selected by those skilled in the art according to the actual requirements, and the present application is not limited thereto.

In some embodiments, the power supply 200 may also be used to provide direct current. The circuit board assembly 20 may be used to convert direct current power received by the input terminals 40 to direct current power of a particular power. At this time, the power module 100 is a DCDC module. For example, the input terminal 40 receives high voltage dc power, and the circuit board assembly 20 may convert the high voltage dc power into low voltage dc power, which is discharged to the load 2000 through the output terminal 30.

In some embodiments, the power supply 200 may be electrically connected directly to the circuit board assembly 20 of the power module 100 by wires, such that the input terminals 40 may be omitted. Space can be saved on the side wall 11 for providing more output terminals 30.

In some embodiments, the terminals 90 may further include signal terminals for enabling communication between the power module 100 and other functional modules.

The manner in which the input terminals 40 connect the housing 10 and the circuit board assembly 20 may be similar to the manner in which the output terminals 30 connect the housing 10 and the circuit board assembly 20. For the avoidance of redundancy, the manner in which the output terminals 30 connect the housing 10 and the circuit board assembly 20 is described in detail herein as an example.

Fig. 4 is a partial structural schematic diagram of an embodiment of the power module 100 shown in fig. 2. As shown in fig. 4, the output terminal 30 may fixedly connect the housing 10 and the circuit board assembly 20.

Fig. 5 is a schematic structural view of one embodiment of the output terminal 30 shown in fig. 4. Fig. 6 is a schematic view of the structure of the output terminal 30 shown in fig. 5 at another angle.

As shown in fig. 5 and 6, the output terminal 30 may include a housing 31, an electrode sheet 32, a sealing ring 33, and an extension block 34.

The electrode sheet 32 may be embedded in the case 31. The electrode pads 32 may be used to connect the circuit board assembly 20 to the load 2000 for outputting the converted current of the circuit board assembly 20 to the load 2000.

In some embodiments, the material of the housing 31 may be an insulating material, such as plastic.

Illustratively, the outer surface 311 of the housing 31 may include a first end surface 312, a second end surface 313, and a peripheral side surface 314. The first end face 312 and the second end face 313 are disposed opposite. The peripheral side surface 314 connects between the first end surface 312 and the second end surface 313. Wherein, the first end surface 312 is located in the accommodating space 13. The second end surface 313 is exposed opposite the first side wall 111. It will be appreciated that the second end surface 313 is exposed opposite to the first side wall 111, and the second end surface 313 may be flush with a surface of the first side wall 111 on a side away from the accommodating space 13, or may extend out of the housing 10.

In some embodiments, the peripheral side 314 of the housing 31 may include a top surface 3141, a first side 3142, a bottom surface 3143, and a second side 3144, which are sequentially connected. Wherein the top surface 3141 may be spaced from and disposed opposite the bottom surface 3143. The first side 3142 may be spaced apart from and disposed opposite the second side 3144. The top surface 3141 and the bottom surface 3143 are connected between the first side surface 3142 and the second side surface 3144. The top surface 3141 is located on a side of the bottom surface 3143 remote from the bottom wall 12.

Fig. 7 is a schematic diagram of the structure of one embodiment of the electrode sheet 32 shown in fig. 5. Fig. 8 is a schematic view of the electrode sheet 32 shown in fig. 7 at another angle.

As shown in fig. 5 to 8, the electrode sheet 32 may include a first electrode sheet 321, a second electrode sheet 322, and a third electrode sheet 323. The first electrode tab 321, the second electrode tab 322, and the third electrode tab 323 are embedded in the case 31 at intervals. Among them, the first electrode tab 321 may be a positive electrode, and the second electrode tab 322 and the third electrode tab 323 may be negative electrodes. Or the first electrode tab 321 may be a negative electrode, and the second electrode tab 322 and the third electrode tab 323 may be positive electrodes.

The first electrode tab 321, the second electrode tab 322, and the third electrode tab 323 may each be used to electrically connect the circuit board assembly 20 and the load 2000. The second electrode tab 322 and the third electrode tab 323 may be connected to the circuit board assembly 20 in a similar manner to the first electrode tab 321. In order to avoid redundancy, the first electrode sheet 321 is taken as an example, and will be described in detail below.

Illustratively, the first electrode tab 321 may include a first electrical connection terminal 3211, a connection portion 3212, and a second electrical connection terminal 3213 (the first electrical connection terminal 3211, the connection portion 3212, and the second electrical connection terminal 3213 are schematically distinguished by dashed lines in fig. 7) that are sequentially connected. One end of the connection portion 3212 may be connected to the first electrical connection terminal 3211, and the other end may be connected to the second electrical connection terminal 3213.

In some embodiments, the first and second electrical connection ends 3211, 3213 may be exposed with respect to the outer surface 311 of the housing 31. Illustratively, the first electrical connection end 3211 may extend through the peripheral side 314, exposed opposite the housing 31. The second electrical connection end 3213 may be exposed at the second end surface 313 opposite the housing 31 and the shell 10. That is, the first electrical connection terminal 3211 may be located inside the case 10. The second electrical connection terminal 3213 may be exposed outside the case 10.

The first electrical connection terminal 3211 may be used to connect the circuit board assembly 20. The connection portion 3212 may be located inside the case 31. The connection portion 3212 may be used to transfer electrical current from the first electrical connection 3211 to the second electrical connection 3213. The second electrical connection 3213 may be used to connect the load 2000.

Fig. 9 is a schematic partial cross-sectional view of one embodiment of the power module 100 shown in fig. 4. Fig. 10 is a schematic diagram of an embodiment of the output terminal 30 shown in fig. 9 connected to the circuit board assembly 20.

As shown in fig. 9 and 10, the output terminal 30 may be connected to the circuit board assembly 20 and electrically connected to the circuit board assembly 20. Illustratively, the first electrical connection end 3211 of the first electrode tab 321 may protrude from the top surface 3141 beyond the housing 31 to be connected to the circuit board 21.

In some embodiments, circuit board assembly 20 may include a circuit board 21 and an electronic component 22. The circuit board 21 may serve as a carrier for the electronic components 22, and the circuit board 21 may be used for electrical connection between the plurality of electronic components 22, and between the electronic components 22 and the output terminals 30, 40. The circuit board 21 and the electronic component 22 may both be disposed inside the housing 10. The electronic component 22 may be an active device such as a chip, or may be a passive device such as a capacitor, inductor, resistor, or the like, for example. It will be appreciated that one skilled in the art can form a circuit board assembly 20 with a specific function with the circuit board 21 by selecting the type of electronic component 22 and the manner in which it is attached to the circuit board 21. The application is not limited in this regard.

Fig. 11 is a schematic view of the output terminal 30 of fig. 9 connected to the circuit board assembly 20 at another angle.

As shown in fig. 10 and 11, the circuit board 21 may include n wiring layers 212 and n+1 insulating layers 213 that are stacked. The upper and lower surfaces of the trace layer 212 may be connected to the insulating layer 213. Thus, the insulating layer 213 may be used to provide insulation and protection for the trace layer 212. Wherein n is a positive integer greater than or equal to 1.

In some embodiments, the insulating layer 213 of the circuit board 21 adjacent to the output terminal 30 is a first insulating layer 2131, and the trace layer 212 adjacent to the first insulating layer 2131 is a first trace layer 2122. Wherein the first trace layer 2122 may include a first trace 2121. The first trace 2121 is used to make electrical connections between different locations on the circuit board 21.

In some embodiments, the power module 100 may further include a first fastener 50. The first fastener 50 may pass through the circuit board 21 and be locked to the housing 31. The first electrical connection terminal 3211 may be electrically connected to the first trace 2121 of the circuit board 21 by contact.

It can be appreciated that, compared with the scheme of welding the connection terminal (OT terminal) on the circuit board 21 and implementing the electrical connection of the circuit board 21 to the first electrode pad 321 through the connection terminal, the first electrical connection end 3211 of the first electrode pad 321 is directly connected to the first trace 2121 in the circuit board 21, so that on one hand, the space for setting the connection terminal can be saved, which is beneficial to reducing the volume of the power module 100 and developing miniaturization; on the other hand, the installation steps can be simplified, and the cost is saved.

The number of the first wires 2121 may be a plurality, the plurality of first wires 2121 may be spaced apart, and adjacent first wires 2121 may be filled with an insulating material.

In some embodiments, the number of first fasteners 50 may be one or more.

In some embodiments, the first fastener 50 may be locked to the housing 31 through both the first electrical connection end 3211 and the first trace 2121. It will be appreciated that the first fastener 50 may make the connection between the first trace 2121 of the circuit board 21 and the first electrical connection terminal 3211 tighter, and ensure the reliability of the electrical connection between the first electrical connection terminal 3211 and the circuit board 21.

In some embodiments, the first fastener 50 may be a conductive material. Thus, the first fastener 50 is used to assist in the flow through when fixedly connecting the circuit board 21 to the first electrical connection terminal 3211.

In some embodiments, the housing 31 may be provided with a recess 315. The first fastener 50 may pass through the first electrical connection end 3211 and the first trace 2121, enter the recess 315, and fixedly connect to the housing 31. Illustratively, the opening of recess 315 may be located in top surface 3141. The recess 315 may be disposed opposite the first electrical connection terminal 3211.

In some embodiments, the inner wall surface of the recess 315 may be provided with threads (not shown), and the first fastener 50 may be a screw. The first fastening member 50 may pass through the first electrical connection end 3211 and the first trace 2121 and enter the groove 315 to fixedly connect with an inner wall surface of the groove 315, so that the first fastening member 50 may be locked to the housing 31.

In some embodiments, the output terminal 30 may further include a nut 35. The nut 35 may be embedded on the housing 31. The first fastener 50 may pass through the first electrical connection end 3211 and the first trace 2121 and be locked to the nut 35, thereby allowing the first fastener 50 to be locked to the housing 31. It will be appreciated that the nut 35 may further enhance the reliability of the connection of the first fastener to the terminal.

The nut 35 may be secured within the recess 315 by welding or riveting. In some embodiments, the nut 35 is fully embedded within the groove 315. In other words, the nut 35 does not protrude from the top surface 3141 of the housing 31, and the connection between the first electrical connection terminal 3211 and the first trace 2121 is not hindered while the fastening connection is achieved.

In some embodiments, the first insulating layer 2131 may be provided with a via 2132. The via 2132 penetrates the first insulating layer 2131. In some embodiments, the location of the through holes 2132 constitutes a fenestration area of the circuit board 21.

The first wires 2121 in the first wire layer 2122 may be exposed at the via 2132. The first electrical connection end 3211 of the first electrode tab 321 may be electrically connected to the first trace 2121 in contact with the through hole 2132, thereby electrically connecting to the circuit board 21.

It can be appreciated that the first insulating layer 2131 is located on a side of the first wire 2121 near the output terminal 30, and the first insulating layer 2131 can provide insulation protection for the first wire 2121, so as to prevent the first wire 2121 from leaking electricity when the first wire 2121 is not easily damaged by external force.

As shown in fig. 10, the first electrical connection terminal 3211 may include a protrusion 3215 and a body portion 3126 (the protrusion 3215 and the body portion 3126 are schematically distinguished by a dotted line in fig. 10). The convex portion 3215 connects the side of the body portion 3126 remote from the housing 31. At least a portion of the protruding portion 3215 is located in the through hole 2132, and the protruding portion 3215 is electrically connected to the first wiring 2121 by contact.

It can be appreciated that, by providing the protruding portion 3215 at the first electrical connection terminal 3211, a step may be formed on the first electrical connection terminal 3211, and when the first electrical connection terminal 3211 is connected to the first trace 2121 through the protruding portion 3215, the first insulating layer 2131 may be prevented from blocking the first electrical connection terminal 3211, so that a contact area between the first electrical connection terminal 3211 and the first trace 2121 may be effectively increased. The risk of poor contact between the first electrical connection terminal 3211 and the first trace 2121 can be reduced, so that unnecessary loss can be reduced and local heat generation can be avoided.

In some embodiments, the protrusion 3215 may be an integral structure with the body portion 3126. It will be appreciated that the two components being integrally formed to form a unitary structure means that one of the two components is joined to the other component during the formation of the component, and that the two components do not require re-working (e.g. bonding, welding, snap-fit, screw-connection) to join the two components together.

In some embodiments, the male portion 3215 and the body portion 3126 may be formed as a unitary structure through a stamping process.

As shown in fig. 5, the output terminal 30 may be provided with an interface for connecting the load 2000. The number of interfaces may be one or more. Each interface may be correspondingly connected to a load 2000.

Illustratively, the output terminal 30 may be provided with two interfaces, a first interface 3131 and a second interface 3132, respectively. In some embodiments, the first interface 3131 and the second interface 3132 may be located on the second end surface 313 of the output terminal 30.

Several embodiments of the electrode pads 32 for connection to the circuit board assembly 20 are described above in connection with the figures. The manner in which the output terminal 30 is connected to the load 2000 will be described below with reference to the accompanying drawings.

As shown in fig. 7 and 8, in some embodiments, the first electrode tab 321 may further comprise a third electrical connection terminal 3217. The third electrical connection terminal 3217 is connected to the connection portion 3212 of the first electrode tab 321. The third electrical connection terminal 3217 may be exposed opposite to the outer surface 311 of the housing 31 and spaced apart from the second electrical connection terminal 3213.

The second electrode tab 322 may include a first electrical connection end 3221, a connection portion 3222, and a second electrical connection end 3223 connected in sequence. The first electrical connection end 3221 of the second electrode tab 322 and the second electrical connection end 3223 of the second electrode tab 322 may be exposed with respect to the outer surface 311 of the housing 31. Wherein the first electrical connection end 3221 of the second electrode pad 322 may be used to connect the circuit board assembly 20. The connection portion 3222 may be located inside the housing 31. The connection 3222 may be used to carry electrical current from the first electrical connection 3221 to the second electrical connection 3223. The second electrical connection end 3223 of the second electrode pad 322 may be used to connect the load 2000.

The third electrode tab 323 may include a first electrical connection terminal 3231, a connection portion 3232, and a second electrical connection terminal 3233, which are sequentially connected. The first and second electrical connection terminals 3231 and 3233 may be exposed with respect to the outer surface 311 of the housing 31. Wherein the first electrical connection terminal 3231 can be used to connect the circuit board assembly 20. The connection portion 3232 may be located in a space inside the case. The connection portion 3232 can be used to carry electrical current from the first electrical connection 3231 to the second electrical connection 3233.

The second electrical connection end 3213 of the first electrode tab 321 may form a first interface 3131 with the second electrical connection end 3223 of the second electrode tab 322, and the third electrical connection end 3217 of the first electrode tab 321 forms a second interface 3132 with the second electrical connection end 3233 of the third electrode tab 323. The first interface 3131 and the second interface 3132 are used to connect different loads 2000, respectively. Thus, one output terminal 30 can connect two loads 2000 at the same time.

It is understood that it is possible to form a plurality of interfaces for connecting the load 2000 on the output terminal 30 by controlling the number of electrical connection terminals for connecting the load 2000 in the first electrode tab 321 and the number of electrode tabs in the output terminal 30. In this case, the plurality of interfaces share the positive electrode or the negative electrode. This connection reduces the number of flat cables in the output terminal 30 while not affecting the shunt power down of the output terminal 30. In the case where the volume of the housing 31 of the output terminal 30 is limited, it is achieved that a plurality of interfaces are provided on one output terminal 30, thereby improving the power density of the power module 100. In addition, the number of contacts between the output terminal 30 and the circuit board 21 can be reduced, the wiring structure can be simplified, and the assembly efficiency can be increased.

The shunt power-down of the output terminals 30 means that one output terminal 30 is simultaneously connected to two or more loads 2000, and the connection and disconnection of the output terminal 30 and any one load 2000 can be controlled independently. When the areas of the two power modules 100 for setting the output terminals 30 are the same, the power density of the power module 100 is higher as the number of interfaces is larger.

In other embodiments, electrode sheet 32 may further include a fourth electrode sheet (not shown). The fourth electrode tab has the same electrical properties as the second electrode tab 322 and the third electrode tab 323. The first electrode tab 321 may further include a fourth electrical connection terminal (not shown), and the fourth electrical connection terminal of the first electrode tab 321 and the second electrical connection of the fourth electrode tab form a third interface. A third interface may be used to connect a third load 2000. At this time, one output terminal 30 may be simultaneously connected to three loads 2000.

In some embodiments, multiple interfaces on one output terminal 30 may also share a positive and negative electrode at the same time.

Illustratively, the first electrode tab 321 may include a first electrical connection terminal 3211, a connection portion 3212, a second electrical connection terminal 3213, and a third electrical connection terminal 3217. Meanwhile, the second electrode tab 322 may also include a first electrical connection end 3221, a connection portion 3222, a second electrical connection end 3223, and a third electrical connection end (not shown). The second electrical connection end 3223 and the third electrical connection end are exposed from the outer surface 311 of the housing 31, and are disposed at intervals.

The second electrical connection end 3213 of the first electrode plate 321 and the second electrical connection end 3223 of the second electrode plate 322 form a first interface 3131, and the third electrical connection end 3217 of the first electrode plate 321 and the third electrical connection end of the second electrode plate 322 form a second interface 3132. I.e. the first interface 3131 and the second interface 3132 share both positive and negative electrodes.

In this way, the number of electrode pieces 32 in the case 31 of the output terminal 30 can be further reduced as compared with the case where the positive electrode or the negative electrode is shared, and when the volume of the case 31 of the output terminal 30 is limited, the number of interfaces on the output terminal 30 can be increased, thereby improving the power density of the power module 100.

In some embodiments, first interface 3131 and second interface 3132 may be arranged in a direction perpendicular to bottom wall 12.

Fig. 12 is a partial cross-sectional schematic view of an embodiment of the power module 100 shown in fig. 4.

As shown in fig. 12, an extension block 34 may be attached to a side of the housing 31 remote from the sidewall 11. The extension block 34 may be located in the accommodating space 13 inside the housing 10, and the extension block 34 is fixedly connected with the bottom wall 12. For example, the extension block 34 may be coupled to the first end face 312 of the housing 31. It will be appreciated that the direction from the side wall 11 to the extension block 34 is longitudinal, and that the extension block 34 connects the side of the housing 31 remote from the side wall 11 without increasing the lateral width of the output terminal 30. In addition, in the case of limited space, more output terminals 30 may be provided in the lateral direction, which is advantageous in improving the power density of the power module 100. Also, the extension block 34 can reduce the risk of the output terminal 30 being shifted in the longitudinal direction during the assembly process.

In some embodiments, extension block 34 may be attached to housing 31 by gluing, hinging, or the like.

Illustratively, the power module 100 may further include a second fastener 60. A second fastener 60 may extend through the extension block 34 and be fixedly attached to the bottom wall 12. It will be appreciated that the second fastener 60 has a greater strength of attachment.

In some embodiments, during the process of mounting the output terminal 30 to the housing 10, the output terminal 30 may be mounted from the inside toward the outside of the housing 10 through the first through hole 15, and the sealing ring 33 is located in the first through hole 15 and is interference fit with the first through hole 15. The output terminal 30 is then fixed to the housing 31 by the second fastener 60 passing through the positioning hole 341 on the extension block 34.

In some embodiments, the extension block 34 may be an integral structural member with the housing 31.

The number of the extension blocks 34 may be plural or one. In some embodiments, the number of extension blocks 34 is two, and the two extension blocks 34 are symmetrically disposed on a side of the first end surface 312 adjacent to the bottom wall 12.

As shown in fig. 12, a seal 33 may be located between the side wall 11 and the terminal 90, the seal 33 being used to seal a gap between the terminal 90 and the side wall 11. Illustratively, a seal 33 may be located between the first sidewall 111 and the output terminal 30, the seal 33 being configured to seal a gap between the output terminal 30 and the first sidewall 111.

It can be appreciated that, compared with the scheme that the output terminal 30 fixes the side wall 11 through the flange, and then a sealing member is arranged between the flange and the side wall 11 to prevent water, the application arranges the sealing ring 33 between the side wall 11 and the output terminal 30 to seal the gap between the output terminal 30 and the housing 10, so that the area on the side wall 11 is not occupied, the area originally used for arranging the flange can be saved for arranging the output terminal 30, and the density of the output terminal 30 on the side wall 11 can be effectively improved, thereby being beneficial to improving the power density of the power module 100.

In some embodiments, the seal ring 33 may be interference fit with the inner wall surface of the first through hole 15. In some embodiments, the material of the seal ring 33 may be rubber. It will be appreciated that, compared with the scheme in which the output terminal 30 fixes the side wall 11 through the flange and then a sealing member is arranged between the flange and the side wall 11, the sealing ring 33 of the present application achieves waterproofing through interference fit with the inner wall surface of the first through hole 15, is not affected by the roughness of the surface of the side wall 11 and the connection tightness of the flange and the side wall 11, and has better reliability. When the power module 100 is used in an outdoor environment, external moisture or dust cannot easily enter the housing 10 in severe weather (such as storm), the circuit board assembly 20 cannot easily be affected, and the overall reliability of the power module 100 is better.

In some embodiments, the circuit board 21 is located on a side of the output terminals 30 remote from the bottom wall 12. In this way, the circuit board 21 may partially overlap the output terminals 30 in the direction perpendicular to the bottom wall 12, so that the area of the power module 100 in the direction parallel to the bottom wall 12 may be reduced, which is advantageous for miniaturization of the power module 100.

In some embodiments, the power module 100 may employ a natural heat dissipation mode. The housing 10 may be made of a material that conducts heat well. In this way, the heat of the circuit board assembly 20 can be transferred to the external environment through the housing 10, so as to avoid the failure caused by the overhigh temperature of the circuit board assembly 20, and further ensure the reliability of the power module 100.

In some embodiments, the housing 10 may be made of a metallic material having good thermal conductivity. The housing 10 is illustratively formed of metallic aluminum. In other embodiments, the housing 10 may be made of non-metallic materials.

The housing 31 may be made of an insulating material. For example, the housing 31 may be made of plastic.

As shown in fig. 12, the bottom wall 12 may further include a protrusion 17 and a bottom wall body 122 (the protrusion 17 and the bottom wall body 122 are schematically distinguished by a broken line in fig. 12). The protrusion 17 is provided on a surface of the bottom wall body 122 on a side close to the circuit board assembly 20. The protrusion 17 is disposed opposite the electronic component 22.

It can be appreciated that by arranging the protrusion 17, the distance between the bottom wall 12 and the electronic component 22 on the circuit board 21 can be shortened, and then the heat generated by the operation of the electronic component 22 can be more rapidly transferred to the bottom wall 12 of the housing 10 and dissipated to the outside, which is favorable for the rapid heat dissipation of the electronic component 22 out of the power module 100, and avoids the influence on the operation of the power module 100 caused by the overhigh temperature of the electronic component 22.

In some embodiments, the protrusion 17 may be integrally formed with the bottom wall 12.

In some embodiments, the output terminal 30 may form the escape space 121 at a side near the bottom wall 12. The bottom surface 3143 of the housing 31 of the exemplary output terminal 30 may be stepped. A stepped bottom surface 3143 may be used to form the relief space 121. Extension block 34 may be connected to protrusion 17.

At least a portion of the protrusion 17 may be located in the escape space 121, and a portion of the output terminal 30 may be located between the protrusion 17 and the first sidewall 111. In this way, the output terminal 30 may overlap at least partially with the protrusion 17 in a direction parallel to the bottom wall body 122, which is advantageous in terms of downsizing of the power module 100 by providing the escape space 121, compared to a case where the output terminal 30 is located entirely on the side of the protrusion 17 near the side wall 11.

At this time, the arrangement of the electrode sheet 32 may be adjusted according to the stepped shape of the bottom surface 3143. For example, the connection portion 3212 of the first electrode tab 321 can move in a direction away from the bottom surface 3143, thereby avoiding interference with the step-shaped bottom surface 3143.

In some embodiments, the electronic component 22 may be attached to a side of the circuit board 21 proximate to the bottom wall 12 (as shown in fig. 12). That is, the circuit board assembly 20 may be flip-chip. In this way, the distance between the electronic component 22 and the bottom wall 12 can be further shortened as compared with the case where the electronic component 22 is attached to the side of the circuit board 21 remote from the bottom wall 12. In the working process of the circuit board assembly 20, heat generated by the electronic component 22 can be quickly transferred to the shell 10, and the shell 10 is used for radiating, so that the radiating efficiency is improved, and the influence on the working performance of the circuit board assembly 20 due to the overhigh working temperature is avoided.

One embodiment of the power module 100 is specifically described above in connection with the associated figures. Several embodiments of the power module 100 are described below in conjunction with the associated figures.

In some embodiments, the same technical content as in the previous embodiments is not repeated. Fig. 13 is a schematic structural view of still another embodiment of the output terminal 30 connection circuit board assembly 20 shown in fig. 9.

As shown in fig. 13, the plane of the first insulating layer 2131 is a first plane, and the projection of the first electrical connection end 3211 of the first electrode pad 321 on the first plane coincides with the projection of the first electrical connection end on the first plane of the through hole 2132. In other words, there is no first insulating layer 2131 between the first electrical connection ends 3211 of the first electrode pads 321 and the first trace layer 2122.

It is understood that the surface of the first electrical connection end 3211 of the first electrode pad 321, which is far from the side of the housing 31, may be used for contact connection with the first wires 2121, which is not obstructed by the first insulating layer 2131, so as to facilitate increasing the contact area between the first electrode pad 321 and the first wires 2121 in the first wire layer 2122. The risk of poor contact between the first electrical connection terminal 3211 and the first trace 2121 can be reduced, so that unnecessary loss can be reduced and local heat generation can be avoided.

Fig. 14 is a schematic view of one embodiment of the through holes 2132 of the first insulating layer 2131 in the circuit board 21 shown in fig. 13. The through hole 2132 is schematically indicated by a broken line in fig. 14.

As shown in fig. 14, when the through hole 2132 is closer to the edge of the circuit board 21, the through hole 2132 may communicate with the edge of the circuit board 21 on the side close to the output terminal 30. It is understood that the through hole 2132 may be any shape. By increasing the through hole 2132, the contact area between the first electrode pad 321 and the first trace 2121 in the first trace layer 212 is advantageously increased.

In some embodiments, the same technical content as in the previous embodiments is not repeated. Fig. 15 is a schematic structural view of still another embodiment of the output terminal 30 connection circuit board assembly 20 shown in fig. 9.

As shown in fig. 15, the circuit board 21 may further include a conductive member 214. Conductive element 214 may be located within through hole 2132. The thickness of the conductive member 214 is greater than or equal to the thickness of the first insulating layer 2131. Thus, the first electrical connection terminal 3211 may electrically connect the first trace 2121 of the circuit board 21 through the conductive element 214 in the through hole 2132. The first electrical connection terminal 3211 is not obstructed by the first insulating layer 2131 when connected to the first trace 2121. The contact area between the first electrical connection terminal 3211 and the first trace 2121 is increased. The risk of poor contact between the first electrical connection terminal 3211 and the first trace 2121 can be reduced, so that unnecessary loss can be reduced and local heat generation can be avoided.

The conductive member 214 may be made of a conductive material. In some embodiments, the conductive member 214 may be made of a metal material, such as copper. In other embodiments, the conductive member 214 may be made of other non-metallic conductive materials, such as conductive paste.

In some embodiments, the conductive member 214 may be an integral structure with the first trace 2121.

In some embodiments, the same technical content as in the previous embodiments is not repeated. Fig. 16 is a schematic structural view of another embodiment of the output terminal 30 shown in fig. 9 connected to the circuit board assembly 20.

As shown in fig. 16, the first electrical connection terminal 3211 may include a male portion 3215 and a body portion 3126. The convex portion 3215 connects the body portion 3126. The convex portion 3215 connects the side of the body portion 3126 remote from the housing 31. At least a portion of the protruding portion 3215 is located in the through hole 2132, and the protruding portion 3215 is electrically connected to the first wiring 2121 by contact. Meanwhile, the plane of the first insulating layer 2131 is a first plane, and the projection of the first electrical connection end 3211 of the first electrode tab 321 on the first plane coincides with the projection of the first plane of the through hole 2132.

That is, the methods for increasing the contact area between the first electrical connection terminal 3211 and the first trace 2121 described above can be combined with each other, so that the risk of poor contact between the first electrical connection terminal 3211 and the first trace 2121 is further reduced, and unnecessary loss can be reduced and local heat generation can be avoided.

It should be noted that, under the condition of no conflict, the embodiments of the present application and features in the embodiments may be combined with each other, and any combination of features in different embodiments is also within the scope of the present application, that is, the above-described embodiments may also be combined arbitrarily according to actual needs.

It should be noted that all the foregoing drawings are exemplary illustrations of the present application, and do not represent actual sizes of products. And the dimensional relationships among the components in the drawings are not intended to limit the actual products of the application.

The foregoing is merely illustrative embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present application, and the application should be covered. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (16)

1. A power module (100) characterized by comprising a circuit board (21), terminals (90) and a first fastener (50);

the terminal (90) comprises a shell (31) and a first electrode plate (321), the first electrode plate (321) is embedded on the shell (31), the first electrode plate (321) comprises a first electric connection end (3211), and the first electric connection end (3211) is exposed relative to the outer surface (311) of the shell (31);

the first fastener (50) passes through the circuit board (21) and is locked on the shell (31), and the first electric connection end (3211) is electrically connected with the first wiring (2121) of the circuit board (21) through a contact or conductive piece (214).

2. The power module (100) of claim 1, wherein the first fastener (50) passes through the first electrical connection (3211) and the first trace (2121).

3. The power module (100) of claim 2, wherein the terminal (90) further comprises a nut (35), the nut (35) being embedded on the housing (31), the first fastener (50) being locked with the nut (35).

4. The power module (100) of claim 2, wherein the circuit board (21) includes a first insulating layer (2131), the first insulating layer (2131) being located on a side of the first trace (2121) proximate to the terminal (90);

the first insulating layer (2131) is provided with a through hole (2132), the first wire (2121) is exposed at the through hole (2132), and the first electrical connection end (3211) is electrically connected with the first wire (2121) in the through hole (2132) through contact or the conductive piece (214).

5. The power module (100) of claim 4, wherein the first electrical connection terminal (3211) includes a protrusion (3215), at least a portion of the protrusion (3215) being located within the via (2132), the protrusion (3215) electrically connecting the first trace (2121) via a contact.

6. The power module (100) of claim 4, wherein the plane in which the first insulating layer (2131) is located is a first plane, and a projection of the first electrical connection terminal (3211) on the first plane coincides with a projection of the via (2132) on the first plane.

7. The power module (100) of claim 4, wherein a thickness of the conductive member (214) is greater than or equal to a thickness of the first insulating layer (2131) when the first electrical connection terminal (3211) is electrically connected to the first trace (2121) via the conductive member (214).

8. The power module (100) according to any one of claims 1 to 7, wherein the first electrode sheet (321) further comprises a second electrical connection end (3213) and a third electrical connection end (3217), the second electrical connection end (3213) of the first electrode sheet (321) and the third electrical connection end (3217) of the first electrode sheet (321) being exposed with respect to the outer surface (311) of the housing (31) and being disposed at intervals;

the terminal (90) further comprises a second electrode plate (322) and a third electrode plate (323), the second electrode plate (322) and the third electrode plate (323) are embedded on the shell (31) at intervals, and a second electric connection end (3223) of the second electrode plate (322) and a second electric connection end (3233) of the third electrode plate (323) are exposed relative to the outer surface (311) of the shell (31);

The second electrical connection end (3213) of the first electrode sheet (321) and the second electrical connection end (3223) of the second electrode sheet (322) form a first interface (3131), and the third electrical connection end (3217) of the first electrode sheet (321) and the second electrical connection end (3233) of the third electrode sheet (323) form a second interface (3132).

9. The power module (100) according to any one of claims 1 to 7, wherein the first electrode sheet (321) further comprises a second electrical connection end (3213) and a third electrical connection end (3217), the second electrical connection end (3213) of the first electrode sheet (321) and the third electrical connection end (3217) of the first electrode sheet (321) being exposed with respect to the outer surface (311) of the housing (31) and being disposed at intervals;

the terminal (90) further comprises a second electrode plate (322), the second electrode plate (322) is embedded on the shell (31), and a second electric connection end (3223) of the second electrode plate (322) and a third electric connection end of the second electrode plate (322) are exposed relative to the outer surface (311) of the shell (31) and are arranged at intervals;

the second electric connection end (3213) of the first electrode plate (321) and the second electric connection end (3223) of the second electrode plate (322) form a first interface (3131), and the third electric connection end (3217) of the first electrode plate (321) and the third electric connection end of the second electrode plate (322) form a second interface (3132).

10. The power module (100) according to any one of claims 1 to 7, wherein the power module (100) further comprises a housing (10), the housing (10) comprising a side wall (11) and a bottom wall (12), the terminals (90) being located partly inside the housing (10) and partly exposed outside the housing (10) through the side wall (11);

the circuit board (21) is located on a side of the terminal (90) remote from the bottom wall (12).

11. The power module (100) of claim 10, wherein the terminal (90) includes an extension block (34), the extension block (34) being connected to a side of the housing (31) remote from the side wall (11), the extension block (34) being located inside the housing (10), the extension block (34) being fixedly connected to the bottom wall (12).

12. The power module (100) of claim 11, wherein the power module (100) further comprises a second fastener (60), the second fastener (60) passing through the extension block (34) fixedly attached to the bottom wall (12).

13. The power module (100) according to claim 11 or 12, wherein the bottom wall (12) further comprises a protrusion (17), a side of the terminal (90) close to the bottom wall (12) is provided with a avoiding space (121), at least part of the protrusion (17) is located in the avoiding space (121), and the extension block (34) is connected with the protrusion (17);

The power module (100) further comprises an electronic component (22), the electronic component (22) is connected with the circuit board (21), and the electronic component (22) is arranged opposite to the protrusion (17).

14. The power module (100) of claim 13, wherein the electronic component (22) is connected to a side of the circuit board (21) proximate to the bottom wall (12).

15. The power module (100) of claim 10, wherein the terminal (90) further comprises a sealing ring (33), the sealing ring (33) being located between the side wall (11) and the terminal (90), the sealing ring (33) being configured to seal a gap between the terminal (90) and the side wall (11).

16. A power supply system (1000) comprising a power supply (200) and a power module (100) according to any of claims 1 to 15, the power module (100) being electrically connected to the power supply (200).