Auxiliary-cooled electronic assembly with extrusion-cooling cavity

Abstract

An assisted-cooling electronic assembly includes a metal extrusion. The metal extrusion includes one or more cooling conduits extending axially along a length of the metal extrusion, with a first open end in fluid communication with the cooling conduit and a second open end in fluid communication with the cooling conduit; a first end cap coupled to the first open end forming a fluid-tight seal between the first end cap and the metal extrusion; a second end cap coupled to the second open end forming a fluid-tight seal between the second end cap and the metal extrusion; and one or more circuit components electrically linked together to form a circuit mounted to the metal extrusion.

Description

TECHNICAL FIELD

[0001] The present application relates to an assembly that houses a plurality of circuit components, and more particularly, to a metal extrusion having a cooling cavity that is capable of receiving and delivering a cooling fluid. BACKGROUND

[0002] Circuits can be implemented using a variety of different electrical components, the selection of which can be based on the controlled electrical system. For example, an electrical system having an electric motor can use electrical components such as one or more power switches to selectively flow current to the motor windings of the electric motor. As the power switches control the flow of current to the electric motor, the switches generate heat. However, the performance of the electrical components and the circuit generally do not require this heat. Reducing the temperature of the electrical components can improve the performance of the circuit.

[0003] Electrical components of a circuit can be cooled in a variety of ways. At times, air can be forced over the surface of the electrical components to dissipate the heat emitted and carry it away from the circuit. However, ambient air in flow is a relatively inefficient medium for carrying heat away from the electrical components. Instead, a cooling fluid placed in proximity to the electrical components can be used to more effectively remove the heat. But electrical components are generally not compatible with fluids and cannot be in contact with the fluid as they are with ambient air. It would be beneficial to cool electrical components using an assembly that effectively flows a cooling fluid but maintains a leak-tight separation between the fluid and the electrical components. SUMMARY

[0004] In one implementation, an auxiliary-cooled electronic assembly includes a metal extrusion. The metal extrusion includes one or more cooling conduits extending axially along a length of the metal extrusion, wherein a first open end is in fluid communication with the cooling conduit; and a second open end is in fluid communication with the cooling conduit; a first end cap coupled to the first open end forming a fluid-tight seal between the first end cap and the metal extrusion; a second end cap coupled to the second open end forming a fluid-tight seal between the second end cap and the metal extrusion; and one or more circuit components electrically linked together to form a circuit mounted to the metal extrusion.

[0005] In another implementation, an auxiliary-cooled electronic assembly includes a metal extrusion including one or more cooling conduits extending axially along a length of the metal extrusion having a first open end in fluid communication with the cooling conduits and a second open end in fluid communication with the cooling conduits; a cover conduit extending axially along the length of the metal extrusion separated from the cooling conduits by a mounting base extending between the cover conduit and the cooling conduits; a first end cap coupled to a first end of the metal extrusion forming a fluid-tight seal between the first end cap and the first open end; a second end cap coupled to a second end of the metal extrusion forming a fluid-tight seal between the second end cap and the second open end; and one or more circuit components electrically linked together to form a circuit mounted to the metal extrusion. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 is a perspective view depicting an implementation of an auxiliary-cooled electronic assembly;

[0007] Figure 2 is a perspective view depicting an implementation of a portion of an auxiliary-cooled electronic assembly;

[0008] Figure 3 is another perspective view depicting an implementation of a portion of an auxiliary-cooled electronic assembly;

[0009] Figure 4 is a perspective view depicting another implementation of a portion of an auxiliary-cooled electronic assembly;

[0010] Figure 5 is a perspective view depicting another implementation of a portion of an auxiliary-cooled electronic assembly;

[0011] Figure 6 is a perspective view depicting another implementation of an auxiliary-cooled electronic assembly;

[0012] Figure 7 is an exploded view depicting another implementation of an auxiliary-cooled electronic assembly;

[0013] Figure 8 is a perspective view depicting another implementation of a portion of an auxiliary-cooled electronic assembly;

[0014] Figure 9 is a perspective view depicting another implementation of a portion of an auxiliary-cooled electronic assembly;

[0015] Figure 10 is a cross-sectional view depicting another implementation of a portion of an auxiliary-cooled electronic assembly;

[0016] Figure 11 is a perspective view depicting another implementation of a portion of an auxiliary-cooled electronic assembly;

[0017] Figure 12 is a perspective view depicting another implementation of a portion of an auxiliary-cooled electronic assembly;

[0018] Figure 13 is an exploded view depicting another implementation of an auxiliary-cooled electronic assembly;

[0019] Figure 14 is a cross-sectional view depicting another implementation of a portion of an auxiliary-cooled electronic assembly; and

[0020] Figure 15 is a perspective view depicting another implementation of a portion of an auxiliary-cooled electronic assembly. DETAILED DESCRIPTION

[0021] Auxiliary-cooled electronic assemblies can carry circuit components and cool these components using one or more cooling conduits in a metal extrusion that flows a cooling fluid. End caps can be attached to the assembly or metal extrusion, forming a fluid-tight seal that encapsulates the cooling conduits; these caps can include fluid inlets and / or fluid outlets for the cooling fluid to enter and exit the cooling conduits and carry heat away from the circuit components. Circuit components can be attached to the metal extrusion and protected by a cover that extends over and encapsulates them beneath or inside it. A cooling fluid, such as an internal combustion engine (ICE) coolant or lubricant, can be provided to the fluid inlets. The fluid can pass through the cooling conduits and exit the fluid outlets.

[0022] REFERENCE Figures 1-4 , an implementation of an auxiliary-cooled electronic assembly 10 is shown. Figure 1 The assembly 10 is shown, which includes a metal extrusion 12, a first end cap 14 with a fluid inlet 16 and a fluid outlet 18, a second end cap 20, and a cover 22. Figure 4 The plurality of circuit components 24 shown can be mounted directly on the metal extrusion 12, such that a surface of the components 24 abuts and contacts the metal extrusion 12, or such that the components 24 are in close proximity to the metal extrusion 12. The metal extrusion 12 can include one or more cooling conduits 26 that extend axially within the metal extrusion 12 and can convey a cooling fluid within the extrusion 12. Figure 2An implementation of the metal extrusion 12 is shown that includes in the assembly, without end caps 14, 20. The overall structure of the metal extrusion 12 and cooling conduit 26 can be formed by extruding the metal through a die such that the cooling conduit 26 is formed along the length of the metal extrusion 12 along with the structure of the metal extrusion 12. The shape of the die can define the cross-sectional shape of the metal extrusion 12, including the mounting base 28 that receives the circuit component 24, as well as the cooling conduit 26. The metal extrusion 12 can have a cross-section defined by the die and a length that can be set when the metal extrusion 12 is created. In some implementations, the fins 30 can be formed in the metal extrusion 12 that extend into the cooling conduit 26 and along the length of the metal extrusion 12. The fins 30 can have a cross-section defined by the die through which the metal is extruded. The fins 30 can increase the surface area of the cooling conduit 26, and thereby the surface area of the metal extrusion 12 that is exposed to the cooling fluid.

[0023] Generally, the metal extrusion 12 can be formed when a metal billet, such as aluminum, is forced under pressure through a die having a smaller cross-sectional dimension relative to the billet. In one implementation, the metal extrusion 12 can be formed from aluminum. The cross-sectional shape of the metal extrusion 12 can be uniform along its axial length. The length of the metal extrusion 12 can be defined by cutting the extrusion perpendicular to its axis (x). A number of different extrusion techniques can be used to manufacture the metal extrusion 12. For example, hot extrusion and cold extrusion can be used to form the metal extrusion 12, and the metal billet can be forced through the die directly or indirectly. And it should be understood that metal materials other than aluminum can be used to form the metal extrusion 12.

[0024] The first end cap 14 and the second end cap 20 can be attached to the metal extrusion 12 in a fluid-tight manner to enclose and partially define the cooling conduits 26. The first end cap 14 can be attached to the first end 32 of the metal extrusion 12 to isolate the first open end 34 and define at least a portion of the fluid conduit 26. The second end cap 20 can be attached to the second end 36 of the metal extrusion 12 to isolate the second open end 38 and define at least a portion of the fluid conduit 26. In some implementations, a gasket can be used between the first end cap 14 and the first end 32 and / or the second end cap 20 and the second open end 38. The first end cap 14 and the second end cap 20 can be attached to the metal extrusion 12 in a variety of ways, such as by welding, brazing, or via mechanical fasteners that draw the end caps 14, 20 toward the metal extrusion 20. In this implementation, the metal extrusion 12 includes two cooling conduits 26. The first end cap 14 includes a conduit divider 40 that separates the first fluid conduit 26a from the second fluid conduit 26b. The first end cap 14 can include a fluid inlet 16 in fluid communication with the first fluid conduit 26a and a fluid outlet 18 in fluid communication with the second fluid conduit 26b. The fluid inlet 16 can be separated from the fluid outlet 18 by the conduit divider 40, as shown in Figure 3 In another embodiment, as shown in Figure 4 the first end cap 14 can include a first fluid inlet 16a separated from a second fluid inlet 16b by the conduit divider 40 and the second end cap 20 can include a first fluid outlet 18a separated from a second fluid outlet 18b by the conduit divider 40. The first fluid inlet 16a receives cooling fluid and passes the cooling fluid through the first cooling conduit 26a to the first fluid outlet 18a and the second fluid inlet 16b receives cooling fluid and passes the cooling fluid to the second fluid outlet 18b. The width and height of the first end cap 14 and the second end cap 20 can be closely conforming or matching to the width and height of the metal extrusion 12.

[0025] One or more circuit components 24 can be attached to the metal extrusion 12. The outer surface of the metal extrusion 12 can include a mounting base 28 on which the circuit components 24 can be attached to the assembly 10. The mounting base 28 can be a part of the metal extrusion 12 that receives the circuit components 24 on one side and on the other opposite side of the base 28 there is a cooling conduit 26 that carries a cooling fluid. The circuit components 24 include switches, resistors, inductors, and capacitors that can be carried by a printed circuit board assembly (PCBA) and electrically connected together to form an electrical circuit. The circuit components 24 can be attached to the mounting base 28 via a rail 42 that provides some spacing between the circuit components 24 and the mounting base 28 so that they are in close proximity to the mounting base 28 but do not directly contact the mounting base 28. In one embodiment, a plurality of circuit components 24, such as power switches implemented as MOSFETs along with resistors, capacitors, and / or inductors, can be physically and electrically linked to a PCBA 44 and the PCBA 44 can be physically attached to the rail 42. In another implementation, the circuit components 24 can be directly attached to the mounting base 28 of the metal extrusion 12 so that a surface of the circuit components 24 directly abuts the mounting base 28 of the metal extrusion 12 without the spacing that occurs using the rail 42. In one implementation, a PCBA 44 carrying a plurality of circuit components 24, such as power switches and the like, can be directly mounted so that a substrate of the PCBA 44 abuts the mounting base 28. In this implementation, the PCBA substrate can be made of metal rather than a composite material, such as FR4, to better conduct heat from the components 24, such as power switches, into the metal extrusion 12 so that the cooling fluid passing through the fluid conduit 26 can more efficiently carry away the heat. In another implementation, the PCBA 44 can be mounted so that the circuit components 24, such as power switches, can be mounted between the PCB substrate and the mounting base 28 of the metal substrate 12 so that at least some of the circuit components 24 can directly abut the mounting base 28 and contact the outer surface of the metal substrate 12.

[0026] In one implementation, a cover 22 can be attached to the metal extrusion 12, the first end cap 14, and / or the second end cap 20. The cover 22 can be a separate element that encases the circuit components 24 and protects them from external damage, such as heat, dust, or moisture, to name a few. In this implementation, the cover 22 is attachable to the metal extrusion 12, the first end cap 14, and / or the second end cap 20 by a plurality of fasteners 46, such as screws, bolts, or the like. In another implementation, the cover 22 can be integrally formed with the metal extrusion 12, the first end cap 14, and / or the second end cap 20. In this implementation, the cover 22 can be formed of a single piece of material that is molded or otherwise formed around the circuit components 24 and the metal extrusion 12, the first end cap 14, and / or the second end cap 20. Figure 1The illustrated auxiliary cooling electronic component 10 consists of discrete components. The cover 22 may be stamped from a sheet of metal or cast from metal, and includes physical attachment points 46 at which the cover 22 can be attached to the component 10. The cover 22 may be attached using mechanical fasteners such as screws / nuts or rivets, or pivotable clamps, which are releasably attached to the metal extrusion 12 and have levers that engage with and compress the cover 22 against it. In some implementations, the cover 22 may be molded from a composite material or plastic. The plastic or composite material may be made of an electromagnetic field (EMF) shielding material. For example, an EMF fabric may be molded into the composite material forming the cover 22. The EMF shielding material may form a Faraday cage around the circuit component 24. In addition, the cover 22 may include one or more openings 48, which may accommodate electrical inputs or outputs, such as power or control signal outputs, in the form of a male or female electrical connector 50 that can receive a corresponding male or female plug.

[0027] Another embodiment of the metal extrusion 12′ is in Figures 5-6 As shown in the figure. The metal extrusion 12 includes one or more mounting flanges 52 that can be integrally formed with the extrusion 12. The mounting flanges 52 are formed as the metal passes through the die, thereby forming flanges 52 extending away from the cooling channel 26. Holes can then be drilled in the mounting flanges 52, and mechanical fasteners can pass through these holes and a structure on which the engagement assembly 10 can be mounted.

[0028] The auxiliary cooling electronic component 10 can receive cooling fluid flowing through the cooling conduit 26, thereby dissipating heat generated by the electrical components 24. The cooling fluid, such as ICE coolant or ICE oil, can be received at the fluid inlet 16 and forced under pressure through the cooling conduit 26 to cool the metal extrusion 12 and the circuit components 24, which eventually exit at the fluid outlet 18, where the cooling fluid can be cooled using a radiator or other heat exchange mechanism, and then eventually returned to the fluid inlet 16.

[0029] Figures 7-12 Another implementation of the auxiliary cooling electronic assembly 60 is shown. Assembly 60 includes a metal extrusion 12 and a metal cover extrusion 64, the metal extrusion 12 being similar to the above-described embodiment. Figures 1-6As depicted, the metal cover extrusion 64 has a hollow cross-section that is coupled to the extrusion 12. In this implementation, a metal extrusion 12 can be attached to the metal cover extrusion 64, and first and second metal cover extrusion caps 66 and 68 can be attached to the ends of the metal cover extrusion 64. The metal extrusion 12 includes a first end cap 14 having a fluid inlet 16 and a fluid outlet 18, and a second end cap 20. A plurality of circuit components 24 can be mounted on the metal extrusion 12, either directly with the surface of the components 24 abutting and contacting the metal extrusion 12, or with the components 24 in close proximity to the metal extrusion 12. The metal extrusion 12 can include one or more cooling conduits 26 that extend axially within the metal extrusion 12 and can convey a cooling fluid within the extrusion 12. In another implementation, as shown, a metal extrusion 62 can include a mounting flange 52 that is ultimately received by a receiving slot 54 formed in a metal cover extrusion 64'. In this implementation, the metal cover extrusion 64' can be extruded through a mold shaped to form the receiving slot 54. The metal extrusion 62 can be slid into the hollow cross-section of the metal cover extrusion 64 such that the mounting flange 52 is shaped to correspond to the receiving slot 54, which can support the metal extrusion 12 within the metal cover extrusion 64. Two or more rails 42 can extend radially, outwardly, and along the outer surface of the metal extrusion 62 from the outer surface of the metal extrusion 62. Figures 8-12

[0030] Figure 8 ​An implementation is shown that includes a metal extrusion 62 in the assembly. The overall structure of the metal extrusion 62 and cooling conduit 26 can be formed by extruding metal through a die as described above. In some implementations, the fins 30 can be formed in the metal extrusion 62 that extends into the cooling conduit 26. The fins 30 can have a cross-section defined by the die through which the metal is extruded. The first end cap 14 and second end cap 20 can be attached to the metal extrusion 62 in a fluid-tight manner so as to enclose and partially define the cooling conduit 26. The first end cap 14 can be attached to the first end 32 of the metal extrusion 62 so as to isolate the first open end 34 and define at least a portion of the fluid conduit 26. The second end cap 20 can be attached to the second end 38 of the metal extrusion 62 so as to isolate the second open end 38 to define at least a portion of the fluid conduit 26. The first end cap 14 and second end cap 20 can be attached to the metal extrusion 62 in a variety of ways as already described above. In this implementation, the metal extrusion 62 includes two fluid conduits 26a, 26b. The first end cap 14 includes a conduit divider 40 that separates the first fluid conduit 26a from the second fluid conduit 26b. The first end cap 14 can include a fluid inlet 16 in fluid communication with the first fluid conduit 26a and a fluid outlet 18 in fluid communication with the second fluid conduit 26b. The fluid inlet 16 can be separated from the fluid outlet 18 by the conduit divider 40. The width and height of the first end cap 14 and second end cap 20 can closely conform or match the width and height of the metal extrusion 62.

[0031] One or more circuit components 24 can be attached to the metal extrusion 62. The outer surface of the metal extrusion 62 can include a mounting base 28 on which the circuit components 24 can be attached to the assembly 60. The mounting base 28 can be a portion of the metal extrusion 62 that receives the circuit components 24 on one side and there is a cooling conduit that carries cooling fluid on the other, opposite side of the mounting base 28. The metal cover extrusion 64 can be formed using similar techniques as described above. A metal billet can be forced through a die that is shaped to the cross section of the cover extrusion 64. The length of the metal cover extrusion 64 can be defined by the size of the metal billet or it can be cut to a particular size. In one implementation, the metal extrusion 62 can be combined with the metal cover extrusion 64 such that the cavity formed in the hollow cross section receives the metal extrusion. During the extrusion of the metal cover extrusion 64, receiving slots 54 can be formed for receiving the mounting flanges 52 or other corresponding protrusions present on the metal extrusion 62. The receiving slots 54 can be slits that extend axially along the length of the cover extrusion 64 and between which the flanges 52 fit during assembly as the metal extrusion 62 is slid within the metal cover extrusion 64. Cover end caps 66, 68 can be attached to the open ends of the metal cover extrusion and can prevent axial movement of the metal extrusion 62 relative to the metal cover extrusion. A gasket 70 can be used between at least one of the cover end caps 66, 68 and the cover extrusion 64.

[0032] Reference Figures 14-15FIG. 1 illustrates another implementation of an auxiliary-cooled electronic assembly 80. The assembly 80 includes a metal extrusion 82 having a cooling conduit 84 extending axially along a length of the metal extrusion 82. The fluid conduit 84 includes a first open end 34 and a second open end 38. A cover conduit 86 extends axially along the length of the metal extrusion 82 and is separated from the cooling conduit 84 by a mounting base 86 extending between the cover conduit 86 and the cooling conduit. In this implementation, the metal extrusion 82 includes the cooling conduit 84 and a cover defined at least in part by the cover conduit 86, a portion of which can be formed as a single piece with the metal extrusion. The cooling conduit 84 can include a plurality of fins 30. Both the cooling conduit 84 and the cover conduit 86 can be at least partially enclosed by a first end cap 90 coupled to the first end 32 of the metal extrusion 82, forming a fluid-tight seal between the first end cap 90 and the first open end 34; the first end cap 90 can also insulate one end of the cover conduit 86. A second end cap 92 coupled to the second end 36 of the metal extrusion 82 can form a fluid-tight seal between the second end cap 92 and the second open end 38; the second end cap 92 can also insulate the other end of the cover conduit 86. The first and second end caps 90, 92 can be attached to the metal extrusion 82 using metal fasteners, such as bolts received by threaded sockets 94 in the extrusion 82, pressing the first and second end caps 90, 92 against the metal extrusion 82. The first end cap 90 can include a fluid inlet 16 for receiving cooling fluid flowing through the cooling conduit 84. The second end cap 92 can include a fluid outlet 18 for cooling fluid exiting the cooling conduit 84. However, other implementations are possible in which one of the first or second end caps 90, 92 can include both the fluid inlet 16 and the fluid outlet 18. In some implementations, the first / second end caps 90, 92 can compress a sealing gasket (not shown) between the cap 90, 92 and the metal extrusion 82. One or more circuit components 24 electrically connected together to form an electrical circuit can be mounted to the metal extrusion 82. In this implementation, the circuit components 24 can be attached to the mounting base 28 as described above.

[0033] It is to be understood that the foregoing description is that of one or more embodiments of the application. Various embodiments of the application are limited by the claims set forth below. Furthermore, the description includes specific details for the purpose of providing a thorough understanding of the application. However, it will be apparent to those skilled in the art that the application can be practiced without specifically

[0034] As used in the specification and claims, the terms "for example," "e.g.," "for instance," "such as," and "like," and the verbs "comprising," "having," "including," and their conjugates, shall not be restricted to the meaning of "consisting only of" or "consisting of" as non- limiting language but shall be interpreted to mean "including." Other terms shall be construed in their broadest, ordinary meaning, unless they are used in a context that requires a different interpretation.

Claims

1. An auxiliary cooling electronic component, comprising: Metal extrusions, including: One or more cooling conduits, extending along the length axial direction of the metal extrusion, comprising: The first open end is in fluid communication with the cooling conduit; The second opening is in fluid communication with the cooling conduit. Heat sinks are formed in the metal extrusion and extend into the cooling conduit; A first end cap is attached to the first open end, forming a fluid-impermeable seal between the first end cap and the metal extrusion. A second end cap, connected to the second open end, forms a fluid-impermeable seal between the second end cap and the metal extrusion; and One or more circuit components electrically linked together to form a circuit mounted to the metal extrusion. Two or more rails extend radially outward from and along the outer surface of the metal extrusion, and a printed circuit board assembly is attached to the rails, wherein at least some of the circuit components are mounted between the printed circuit board assembly and the outer surface of the metal extrusion and in direct contact with the outer surface of the metal extrusion.

2. The auxiliary cooling electronic component according to claim 1, wherein, The first end cap is attached to the first opening end by one or more mechanical fasteners, and the second end cap is attached to the second opening end.

3. The auxiliary cooling electronic component of claim 1, further comprising a cover attached to the metal extrusion for enclosing the circuit components between the metal extrusion and the cover.

4. The auxiliary cooling electronic component according to claim 3, wherein, The cover further includes a metal cover extrusion having a hollow cross-section for receiving the circuit component.

5. The auxiliary cooling electronic component according to claim 3, wherein, The cover includes electromagnetic shielding.

6. The auxiliary cooling electronic component according to claim 1, wherein, The first end cap includes a fluid inlet and a fluid outlet, or both a fluid inlet and a fluid outlet.

7. The auxiliary cooling electronic component according to claim 1, wherein, The second end cap includes a fluid inlet and a fluid outlet, or both a fluid inlet and a fluid outlet.

8. An auxiliary cooling electronic component, comprising: Metal extrusions, including: One or more cooling conduits, extending along the length axial direction of the metal extrusion, comprising: The first open end is in fluid communication with the cooling conduit; The second opening is in fluid communication with the cooling conduit. Heat sinks are formed in the metal extrusion and extend into the cooling conduit; A cover conduit extends along the length axial direction of the metal extrusion and is separated from the cooling conduit by a mounting base extending between the cover conduit and the cooling conduit; A first end cap is attached to a first end of the metal extrusion, forming a fluid-impermeable seal between the first end cap and the first open end. A second end cap, connected to a second end of the metal extrusion, forms a fluid-impermeable seal between the second end cap and the second open end; and One or more circuit components electrically linked together to form a circuit mounted to the metal extrusion. Two or more rails extend radially outward from and along the outer surface of the metal extrusion, and a printed circuit board assembly is attached to the rails, wherein at least some of the circuit components are mounted between the printed circuit board assembly and the outer surface of the metal extrusion and in direct contact with the outer surface of the metal extrusion.

9. The auxiliary cooling electronic component according to claim 8, wherein, The first end cap covers the first end of the cover conduit, and the second end cap covers the second end of the cover conduit, thereby encapsulating the circuit component within the metal extrusion.

10. The auxiliary cooling electronic component according to claim 8, wherein, The first end cap is connected to the first end of the metal extrusion via one or more mechanical fasteners, and the second end cap is connected to the second end of the metal extrusion.

11. The auxiliary cooling electronic component according to claim 8, wherein, The metal extrusion includes electromagnetic shielding.

12. An auxiliary cooling electronic component, comprising: Metal extrusions, including: One or more cooling conduits, extending along the length axial direction of the metal extrusion, comprising: The first open end is in fluid communication with the cooling conduit; The second opening is in fluid communication with the cooling conduit. Heat sinks are formed in the metal extrusion and extend into the cooling conduit; A first end cap is attached to a first end of the metal extrusion, forming a fluid-impermeable seal between the first end cap and the first open end. The second end cap is connected to the second end of the metal extrusion, forming a fluid-impermeable seal between the second end cap and the second open end; A metal cover extrusion, including a cover conduit connected to the metal extrusion; One or more circuit components, electrically linked together, to form a circuit for the metal extrusion mounted within the covering conduit. Two or more rails extend radially outward from and along the outer surface of the metal extrusion, and a printed circuit board assembly is attached to the rails, wherein at least some of the circuit components are mounted between the printed circuit board assembly and the outer surface of the metal extrusion and in direct contact with the outer surface of the metal extrusion.

13. The auxiliary cooling electronic component according to claim 12, wherein, The metal extrusion is received within the cover conduit of the metal cover extrusion.

14. The auxiliary cooling electronic component according to claim 13, further comprising a first metal-covered extrusion cover and a second metal-covered extrusion cover.

Images