CN102280671B - cooling system - Google Patents

Abstract

The invention discloses a cooling system, comprising a cooling plate having a first surface and an opposite second surface, a body portion defined on the first surface and the second surface, a At least one channel for the cooling liquid to flow, an inlet and an outlet connected to the at least one channel for the cooling liquid to flow into and out of the at least one channel respectively. The inlet and outlet are spatially separated by a distance. The at least one channel defines a flow path for coolant from the inlet through the at least one channel to the outlet. The path length of the flow path is substantially greater than the distance between the inlet and the outlet.

Description

cooling system

technical field

The invention relates to a cooling system, in particular to a cooling system sandwiched between two electronic components.

Background technique

With the expanding demand for fossil fuels and growing awareness of the environmental impact of fossil fuel consumption, electric or hybrid electric vehicles are becoming more and more popular. There is a built-in high-voltage rechargeable battery in an electric vehicle or hybrid electric vehicle, which requires a high-frequency and high-efficiency charging system to charge it. However, a large amount of heat will be generated when the battery charging system is working. If the generated heat is not effectively dissipated, it will cause the electronic components in the charging system to overheat, which will cause the performance of the charging system to deteriorate, and even damage the components.

Accordingly, there exists a heretofore unmet need in the prior art to overcome the aforementioned disadvantages and deficiencies.

Contents of the invention

An object of the present invention is to provide a cooling system. In one embodiment, the cooling system includes a first heat sink plate having a first surface and an opposite second surface, a body portion defined between the first surface and the second surface, at least one channel formed in the body portion For cooling liquid to flow, an inlet and an outlet respectively connected with the at least one channel for cooling liquid to flow into and out of the at least one channel, a second cooling plate having a first surface and An opposite second surface, wherein when the first heat dissipation plate and the second heat dissipation plate are assembled together, the second surface of the first heat dissipation plate is coupled to the first surface of the second heat dissipation plate, the first heat dissipation plate and the second heat dissipation plate The second cooling plate is fastened together to form a sealing cover between the second surface of the first cooling plate and the first surface of the second cooling plate to seal the at least one channel.

According to an embodiment of the cooling system, the inlet is located at one end of the at least one channel, and the outlet is located at the other end of the at least one channel, wherein the inlet and the outlet are spaced apart by a certain distance.

According to an embodiment of the cooling system, at least one channel in a serpentine shape is formed to define a zigzag coolant flow path, and the coolant flows from the inlet to the outlet through the at least one channel, wherein the path length of the zigzag flow path is substantially greater than the distance between the inlet and outlet.

According to an embodiment of the cooling system, the second cooling plate has a cooling fin protruding in a serpentine shape from the first surface thereon, and when the first cooling plate and the second cooling plate are fastened together, the cooling fin protrudes in a meandering shape. The heat sink is located in at least one channel.

According to an embodiment of the cooling system, the first surface of the second cooling plate is substantially flat, wherein the first cooling plate has a cooling fin protruding in a serpentine shape from at least one groove thereon.

According to an embodiment of the cooling system, the first surface of the first cooling plate is suitable for installing at least one first electronic component. The second surface of the second heat sink is suitable for mounting at least one second electronic component.

The present invention also discloses another cooling system, comprising: a first heat dissipation plate having a first surface and an opposite second surface, a body portion defined between the first surface and the second surface, a plurality of The first cooling fins protrude from the bottom of the body part, wherein the plurality of first cooling fins are substantially parallel to each other to form a plurality of channels for the cooling liquid to flow therein, an inlet connected to the plurality of channels and a The outlets are respectively used for cooling liquid to flow into and out of the plurality of channels; and a second cooling plate has a first surface and an opposite second surface, wherein when the first cooling plate and the second cooling When the plates are assembled together, the second surface of the first heat dissipation plate is coupled with the first surface of the second heat dissipation plate, and the first heat dissipation plate and the second heat dissipation plate are fastened together so as to be on the second surface of the first heat dissipation plate A sealing cover is formed between the first surface of the second heat dissipation plate and the first surface to seal the plurality of channels.

According to an embodiment of the cooling system, the inlet and the outlet are spatially separated by a certain distance. The inlet and outlet are placed on two corners of a diagonal line of the body portion.

According to an embodiment of the cooling system, each plurality of channels defines a respective flow path of the cooling liquid for the cooling liquid to flow from the inlet to the outlet through the corresponding channel, wherein the path length of each flow path is substantially is greater than the distance between the inlet and outlet.

According to an embodiment of the cooling system, the second cooling plate has a plurality of second cooling fins protruding on a first surface thereon, wherein the plurality of second cooling fins are substantially parallel to each other and are positioned as the first cooling plate and The plurality of second cooling fins are inserted into the plurality of channels formed by the plurality of first cooling fins when the second cooling plates are fastened together.

According to an embodiment of the cooling system, the first surface of the second cooling plate is substantially flat.

According to an embodiment of the cooling system, the first surface of the first cooling plate is suitable for installing at least one first electronic component. The second surface of the second heat sink is suitable for mounting at least one second electronic component.

Another aspect of the present invention also discloses a cooling system, comprising: a heat dissipation plate having a first surface and an opposite second surface, a body portion defined between the first surface and the second surface, forming At least one channel for cooling liquid to flow in the main body, an inlet and an outlet connected to the at least one channel are respectively used for cooling liquid to flow into and out of the at least one channel, wherein the inlet and The outlets are spaced apart by a certain distance, wherein at least one channel defines a respective flow path of the cooling liquid for the cooling liquid to flow from the inlet to the outlet through the corresponding channel, wherein the path length of the respective flow paths is substantially greater than the distance between the inlet and the outlet.

According to an embodiment of the cooling system, at least one channel is formed in a serpentine shape to define a zigzag flow path.

According to an embodiment of the cooling system, further comprising a first cooling plate having a first surface and an opposite second surface, additionally mounted on the cooling plate such that the second surface of the first cooling plate substantially contacts the first cooling plate. a surface.

According to an embodiment of the cooling system, the first surface of the first cooling plate is suitable for mounting at least one first electronic component, wherein the at least one first electronic component includes a first power converter.

According to an embodiment of the cooling system, it further includes a second cooling plate having a first surface and an opposite second surface, additionally mounted on the cooling plate so that the first surface of the second cooling plate is substantially in contact with the first cooling plate. The two surfaces are in contact.

According to an embodiment of the cooling system, the second surface of the second cooling plate is suitable for mounting at least one second electronic component, wherein the at least one second electronic component includes a second power converter.

The present invention also discloses an electronic device, including the above-mentioned cooling system.

According to an embodiment of the electronic device, it further includes a first heat dissipation plate having a first surface and an opposite second surface, additionally mounted on the heat dissipation plate such that the second surface of the first heat dissipation plate is substantially in contact with the cooling system , wherein the first surface of the first heat dissipation plate is suitable for mounting at least one first electronic component.

According to an embodiment of the electronic device, further comprising a second heat dissipation plate having a first surface and an opposite second surface, added to the heat dissipation plate such that the first surface of the second heat dissipation plate is substantially in contact with the cooling system, Wherein the second surface of the second heat dissipation plate is suitable for mounting at least one second electronic component.

According to an embodiment of the electronic device, it further includes at least one first electronic component and at least one second electronic component, and the installation method is that the cooling system is sandwiched between the at least one first electronic component and the at least one second electronic component, wherein at least A first electronic component and at least one second electronic component are electrically connected to each other in serial or parallel connection.

Although changes and modifications to the present invention may be effective without departing from the spirit and scope of the novel concepts of the present invention, the following descriptions in conjunction with the accompanying drawings and embodiments may make the above contents of the present invention clearer.

Description of drawings

The drawings illustrate one or more embodiments of the invention and, together with the written description, describe the principles of the invention. In any case, the same reference numerals are used in the drawings to refer to the same or similar elements of the embodiments, in which:

FIG. 1 shows an exploded schematic diagram of an electronic device, such as a battery charging system including a cooling system, according to an embodiment of the present invention.

FIG. 2 shows a schematic diagram of a first heat dissipation plate in the battery charging system shown in FIG. 1 according to an embodiment of the present invention.

FIG. 3 shows a schematic diagram of a second heat sink in the battery charging system shown in FIG. 1 according to an embodiment of the present invention.

FIG. 4 shows a schematic cross-sectional view of coupling the first heat dissipation plate and the second heat dissipation plate of the cooling system in the battery charging system shown in FIG. 1 according to an embodiment of the present invention.

FIG. 5 shows a schematic diagram of the assembled battery charging system as shown in FIG. 1 .

FIG. 6 shows a schematic cross-sectional view of coupling the first heat dissipation plate and the second heat dissipation plate of the cooling system in the battery charging system shown in FIG. 1 according to another embodiment of the present invention.

Fig. 7 shows an exploded schematic view of an electronic device, such as a battery charging system including a cooling system, according to another embodiment of the present invention.

FIG. 8 shows a schematic diagram of the assembled battery charging system as shown in FIG. 7 .

Detailed ways

The present invention is described more fully below by referring to the accompanying drawings that illustrate exemplary embodiments of the invention. However, the present invention can be implemented in other various forms and should not be limited to the embodiments of the present invention. These embodiments are provided to make the disclosure of the technical solutions more complete, and to explain the scope of the present invention to those skilled in the art. Like reference numerals refer to like elements.

When an element is referred to as being on another element, it can be understood as being directly on the other element or having a connection therebetween. In contrast, when an element is referred to as being directly on another element, it will be understood that there are no connectors present therebetween. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed features.

Although the terms first, second, third etc. may be used to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be construed as being limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section could be termed a second element, component, region, layer or section without departing from the teachings of the present invention.

The terms used herein are for the purpose of describing specific embodiments of the present invention only, and are not intended to limit the present invention. As used herein, the meaning of "a" in the singular includes the plural unless the context clearly dictates otherwise. The term "comprising", or "comprising", or "having" used in the present invention refers to the presence of stated features, regions, integers, steps, operations, elements and/or components, but does not exclude an additional one or Various other features, regions, integers, steps, operations, elements, components, and/or groups.

In addition, relative terms such as "lower" or "bottom," "upper" or "top," and "front" or "rear" may be used to describe one element's relationship to another as shown in the figures. Related terms are meant to encompass various orientations of the device in addition to the orientation shown in the figures. For example, if the device in one of the figures is turned over, elements described as below other elements would then be oriented on top of the other elements. The exemplified term "lower" may include directions of "upper" and "lower", depending on the specific orientation in the drawings. Similarly, if the device in the figures is turned over, elements described as "below" or "beneath" other elements would then be oriented above the other elements. Thus, references to "below" or "beneath" can encompass both an orientation of below and above.

Unless defined otherwise, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should be further understood that, for example, terms defined in commonly used dictionaries, unless otherwise defined, should be translated as having the same meaning as in the present invention and its related technical contents, and will not be translated as idealized or overly formal a feeling of.

As used herein, "about", "approximately" or "almost" shall be within 20%, preferably within 10%, more preferably within 5% or a range of a given value. Quantities given herein are approximate, meaning that the corresponding terms "about", "approximately" or "almost" can be inferred even if not expressly stated.

As used herein, "plural" means more than one.

This technical solution is described through the embodiments of the present invention and accompanying drawings 1-8. In accordance with the purpose of the present invention, the embodiments described herein relate to cooling systems for use in electronic devices such as battery charging systems.

FIG. 1 shows an exploded schematic diagram of a battery charging system 100 including a cooling system according to an embodiment of the present invention. As shown in FIG. 1 , the cooling system in this embodiment includes a first heat dissipation plate 110 and a second heat dissipation plate 120 . Referring to FIGS. 1 , 2 and 4 , especially FIG. 2 , the first heat sink 110 has a first surface 112 , an opposite second surface 114 and a body portion 113 defined between the first surface 112 and the second surface 114 . A plurality of cooling fins 117 protrude from the bottom of the body portion 113, thereby forming at least one channel 116 on the body portion for the flow of cooling liquid therein. An inlet 118 a and an outlet 118 b are connected to the channel 116 , which are respectively used for cooling liquid to flow into and out of the channel 116 . The inlet 118a is located at one end of the channel 116, and the outlet 118b is located at the other end of the channel 116, and the inlet 118a and the outlet 118b are separated by a distance in space. The channel 116 is formed in a serpentine shape, thereby defining a zigzag flow path of cooling liquid flowing from the inlet 118a to the outlet 118b, wherein the path length of the zigzag flow path is substantially greater than the distance between the inlet 118a and the outlet 11b.

Referring to FIGS. 1 , 3 and 4 , especially FIG. 3 , the second heat sink 120 has a first surface 122 and an opposite second surface 124 . Wherein the first surface 122 has protruding serpentine fins 126 .

When the first heat dissipation plate 110 and the second heat dissipation plate 120 are assembled together, the second surface 114 of the first heat dissipation plate 110 is coupled with the first surface 122 of the second heat dissipation plate 120 . The first cooling plate 110 and the second cooling plate 120 are fastened together to form a sealed enclosure between the second surface 114 of the first cooling plate 110 and the first surface 122 of the second cooling plate 120 for sealing the channel 116 . FIG. 4 shows a schematic cross-sectional view of coupling the first heat dissipation plate and the second heat dissipation plate of the cooling system in the battery charging system shown in FIG. 1 according to an embodiment of the present invention. From the cross-sectional view perspective shown in FIG. In the channel 116 of the heat sink 110 .

In another embodiment (not shown), the first surface of the second cooling plate is substantially flat, and a plurality of cooling fins 117 protrude from the bottom of the body portion 113 of the first cooling plate 110 to form at least one Channel 116 for the flow of cooling fluid therein.

As shown in Figure 1, the battery charging system 100 includes a first power converter 130 and a second power converter 132, wherein the first power converter 130 is installed on the first surface 112 of the first cooling plate 110, and the second power converter 132 is mounted on the second surface 124 of the second heat sink 120 . In one embodiment, both the first power converter 130 and the second power converter 132 are high frequency power converters and output about 3.3kW of power. The first power converter 130 and the second power converter 132 may be connected to each other in series or in parallel to generate a total of about 6.6 kW of power. The battery charging system 100 also includes a first cover 150 for sealing the first power converter 130 and a second cover 160 for sealing the second power converter 132 .

FIG. 5 shows a schematic diagram of the assembled battery charging system 100 . During operation, the coolant flowing through the channel 116 removes heat generated by the first power converter 130 and the second power converter 132 . Because the cooling system is sandwiched between the first power converter 130 and the second power converter 132 , the battery charging system 100 can be made compact and has better cooling effect.

According to an embodiment of the present invention, FIG. 6 shows a cross-sectional view when the first cooling plate and the second cooling plate of the cooling system in the battery charging system shown in FIG. 1 are coupled. In this embodiment, the second surface 114 of the first heat sink 110' has a groove 115 to form a body portion 113. A plurality of first parallel fins 601 protrude from the bottom of the groove 115 . The second heat sink (not shown) also has a plurality of second parallel fins protruding from the second surface 124 . When the first cooling plate 110' and the second cooling plate are coupled together, a plurality of second parallel cooling fins are placed between the plurality of first parallel cooling fins 601 to form a plurality of channels 119 for the cooling liquid to flow through. The first cooling plate 110' also has an inlet 118a' and an outlet 118b' connected with a plurality of channels 119, the inlet 118a' and the outlet 118b' are respectively used for cooling liquid to flow into and out of the plurality of channels 119, and the inlet 118a' and The outlets 118b' are spatially separated by a certain distance. In this example, the inlet 118a' and the outlet 118b' are located in two corners of the diagonal of the groove 115.

Each of the plurality of channels 119 each defines a flow path for cooling fluid to flow from the inlet 118a' through the corresponding channel to the outlet 118b'. The path lengths of these respective flow paths are substantially greater than the distance between the inlet 118a' to the outlet 118b'.

In this embodiment, the coolant flows in the plurality of channels 119 in the same direction, which reduces the pressure differential of the coolant between the outlet 118b' and the inlet 118a'.

In another embodiment, the second surface of the second cooling plate is substantially flat. Therefore, a plurality of channels are formed between the plurality of first parallel cooling fins 601 for the cooling liquid to flow therein.

FIG. 7 shows an exploded schematic diagram of a battery charging system 700 including a cooling system according to another embodiment of the present invention. The battery charging system 700 includes a first heat dissipation plate 710 , a second heat dissipation plate 720 and a third heat dissipation plate 730 . The first heat sink has a first surface 712 and an opposite second surface 714 . The second heat sink has a first surface 722 and an opposite second surface 724 . The third heat sink has a first surface 732 and an opposite second surface 734 . The battery charging system 700 further includes a first power converter 740 mounted on the first surface 712 of the first heat sink 710 , and a second power converter 750 mounted on the second surface 734 of the third heat sink 730 .

In one embodiment, each of the first power converter 740 and the second power converter 750 is a high frequency power converter and outputs approximately 3.3 kW of power. The first power converter 740 and the second power converter 750 may be connected to each other in series or in parallel to generate a total of about 6.6 kW of power. The battery charging system 700 also includes a first cover 760 sealing the first power converter 740 and a second cover 770 sealing the second power converter 750 .

The second heat dissipation plate 720 is sandwiched between the first heat dissipation plate 710 and the third heat dissipation plate 730 , and grooved channels 726 are formed on the first surface 722 for cooling liquid to flow therein. The first surface 722 of the second heat dissipation plate 720 is coupled with the second surface 714 of the first heat dissipation plate 710, so that the first heat dissipation plate 710 and the second heat dissipation plate 720 are fastened together to form the first heat dissipation plate 710 on the first heat dissipation plate 710. The sealing cover between the second surface 714 and the first surface 722 of the second heat sink 720 seals the channel 726 . The second cooling plate 720 also has an inlet 728a and an outlet 728b connected to the channel 726 for cooling liquid to flow into and out of the channel 726 respectively. The trench 726 has a zigzag profile and covers most areas of the first surface 722 of the second heat sink 720 . The second surface 724 of each second heat dissipation plate 720 and the first surface 732 of the third heat dissipation plate 730 are flat, so that when the second heat dissipation plate 720 and the third heat dissipation plate 730 are fastened together, the third heat dissipation plate 730 There is good heat conduction between the cooling plate 730 and the second cooling plate 720 .

In another embodiment, the second surface 724 also has grooved channels for the cooling fluid to flow therein.

FIG. 8 shows a schematic diagram of battery charging system 700 when assembled. The first heat dissipation plate 710 , the second heat dissipation plate 720 and the third heat dissipation plate 730 can be fastened together by screws or other fastening means. During operation, the cooling liquid flowing through the channel 726 of the second cooling plate 720 takes away the heat generated by the first power converter 740 and the second power converter 750 . Because the cooling system is sandwiched between the first power converter 740 and the second power converter 750, the battery charging system 700 is compact and well cooled.

In general, the present invention relates to a cooling system comprising a heat sink having a first surface and an opposite second surface, a body portion defined between the first surface and the second surface, formed in the body portion At least one channel for the cooling liquid to flow therein, an inlet connected to the at least one channel and an outlet for the cooling liquid to flow into and out of the at least one channel respectively. The inlet and outlet are spatially separated by a distance. The at least one channel defines a flow path for coolant flowing from the inlet to the outlet through the at least one channel. The at least one channel forms a zigzag shape to define a zigzag flow path. The length of the flow path is substantially greater than the distance between the inlet and outlet.

The cooling system also includes a first heat sink plate having a first surface and an opposite second surface, the first heat sink plate being added to the heat sink plate such that the second surface of the first heat sink plate substantially contacts the first heat sink plate of the heat sink plate. surface. Additionally, the cooling system may also include a second heat sink plate having a first surface and an opposite second surface, the second heat sink plate being added to the heat sink plate such that the first surface of the second heat sink plate substantially contacts the heat sink plate of the second surface.

Although the cooling system of various embodiments has been described above in the context of a battery charging system, it should be understood that the cooling system can be used with other electronic systems that generate significant amounts of heat. The cooling system may be sandwiched between two modules of the electronic system, where each module includes one or more electronic components such as switches, inductors, capacitors, and the like. For example and without limitation, electronic components may be mounted on a printed circuit board (PCB). In another embodiment, there may be multiple cooling systems and one of them is sandwiched between two modules of the electronic system.

In another aspect of the present invention, an electronic device such as a battery charging system includes the cooling system disclosed above.

In one embodiment, the electronic device includes a first heat dissipation plate having a first surface and an opposite second surface, the second surface of the first heat dissipation plate substantially contacts the heat dissipation system, wherein the first surface of the first heat dissipation plate is adapted to for installing at least one first electronic component. The electronic device also includes a second heat dissipation plate having a first surface and an opposite second surface, the first surface of the second heat dissipation plate substantially contacts the heat dissipation system, wherein the second surface of the second heat dissipation plate is adapted to mount at least one first 2. Electronic components. For example, at least one first electronic component includes a first power converter, and at least one second electronic component includes a second power converter.

In another embodiment, the electronic device may include at least one first electronic component and at least one second electronic component, and the cooling system is sandwiched between the at least one first electronic component and the at least one second electronic component.

The foregoing disclosure of typical embodiments of the invention has been presented for the purpose of illustration and description only, but not for exhaustion or limitation of the invention to the precise form disclosed. Many modifications and variations are possible in light of the above teaching.

The above embodiments were chosen and described in order to explain the principles of the invention and their practical application, and to enable others of ordinary skill in the art to use the invention and its various embodiments with various modifications as are suited to particular applications. Other embodiments will also be apparent to those of ordinary skill in the art without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention is defined not by the foregoing description and examples, but by the appended claims.

Claims (30)

1. A cooling system comprising: (a) a first heat dissipation plate having a first surface and an opposite second surface, a body portion defined between the first surface and the second surface, at least one channel formed in the The body portion is used for cooling liquid to flow, and an inlet and an outlet are connected to the at least one channel respectively for the cooling liquid to flow into and out of the at least one channel; and (b) a second heat dissipation plate having a first surface and an opposite second surface, wherein when the first heat dissipation plate and the second heat dissipation plate are assembled together, the second heat dissipation plate of the first heat dissipation plate surface is coupled with the first surface of the second heat dissipation plate, and the first heat dissipation plate and the second heat dissipation plate are fastened together so that the second surface of the first heat dissipation plate and the A sealing cover is formed between the first surfaces of the second cooling plate to seal the at least one channel. 2. The cooling system according to claim 1, wherein the inlet is located at one end of the channel, and the outlet is located at the other end of the channel, wherein the inlet and the outlet are spatially separated at a distance. 3. The cooling system according to claim 2, wherein the at least one serpentine channel defines a zigzag coolant flow path, and the coolant flows from the inlet through the at least one channel to the outlet, wherein the zigzag flow path has a path length substantially greater than a straight line distance between the inlet and the outlet. 4. The cooling system according to claim 3, wherein the second cooling plate has at least one cooling fin protruding in a serpentine shape from the first surface thereon, when the first cooling plate When the plate and the second heat dissipation plate are fastened together, the heat dissipation fins are placed in the at least one channel. 5. The cooling system of claim 1, wherein the first surface of the second cooling plate is substantially flat. 6 . The cooling system according to claim 5 , wherein the first heat dissipation plate has at least one heat dissipation fin protruding in a serpentine shape from the at least one groove thereon. 6 . 7. The cooling system according to claim 1, wherein the first surface of the first heat dissipation plate is suitable for mounting at least one first electronic component. 8. The cooling system according to claim 1, wherein the second surface of the second heat dissipation plate is suitable for mounting at least one second electronic component. 9. A cooling system comprising: (a) a first heat dissipation plate having a first surface and an opposite second surface, a body portion defined between the first surface and the second surface, a plurality of first heat dissipation fins extending from the The bottom of the main body protrudes, wherein the plurality of first cooling fins are substantially parallel to each other to form a plurality of channels for the cooling liquid to flow therein, and an inlet and an outlet are respectively connected to one of the plurality of channels. a joint for flow of the coolant into and out of the plurality of channels; and (b) a second heat dissipation plate having a first surface and an opposite second surface, wherein when the first heat dissipation plate and the second heat dissipation plate are assembled together, the second heat dissipation plate of the first heat dissipation plate surface is coupled with the first surface of the second heat dissipation plate, and the first heat dissipation plate and the second heat dissipation plate are fastened together so that the second surface of the first heat dissipation plate and the A sealing cover is formed between the first surfaces of the second cooling plate to seal the channel. 10. The cooling system of claim 9, wherein the inlet and the outlet are spatially separated by a distance. 11. The cooling system according to claim 10, wherein each of said plurality of channels defines a respective flow path of said cooling liquid for said cooling liquid to pass through a corresponding one of said inlets. The channel flows to the outlet, wherein the path length of the respective flow paths is substantially greater than the linear distance between the inlet and the outlet. 12. The cooling system of claim 10, wherein the inlet and the outlet are placed on two corners of a diagonal of the body portion. 13. The cooling system according to claim 9, wherein the first surface of the second cooling plate has a plurality of protruding second cooling fins, wherein the plurality of second cooling fins are substantially The plurality of second heat dissipation fins are parallel to each other and inserted into the plurality of channels formed by the plurality of first heat dissipation fins when the first heat dissipation plate and the second heat dissipation plate are assembled together. 14. The cooling system of claim 9, wherein the first surface of the second heat sink plate is substantially flat. 15. The cooling system according to claim 9, wherein the first surface of the first heat dissipation plate is suitable for mounting at least one first electronic component. 16. The cooling system according to claim 9, wherein the second surface of the second heat dissipation plate is suitable for mounting at least one second electronic component. 17. A cooling system comprising: A heat dissipation plate has a first surface and an opposite second surface, a body portion defined between the first surface and the second surface, and a cooling liquid formed on the body portion at least one channel flowing therein, an inlet and an outlet connected to the at least one channel for the cooling liquid to flow into and out of the channel respectively, wherein the inlet and the outlet are spatially separated at a distance, wherein said at least one channel defines a flow path of said cooling liquid for said cooling liquid to flow from said inlet to said outlet through a corresponding said channel, wherein said respective flow the path length of the path is substantially greater than the straight-line distance between the inlet and the outlet; a first heat sink having a first surface and an opposite second surface, attached to said heat sink so that said second surface of said first heat sink substantially contacts said first heat sink of said heat sink a surface. 18. The cooling system according to claim 17, wherein the at least one channel is formed in a serpentine shape to define a zigzag flow path. 19. The cooling system according to claim 17, wherein the first surface of the first heat dissipation plate is suitable for mounting at least one first electronic component. 20. The cooling system of claim 19, wherein the at least one first electronic component comprises a first power converter. 21. A cooling system comprising: A heat dissipation plate has a first surface and an opposite second surface, a body portion defined between the first surface and the second surface, and a cooling liquid formed on the body portion at least one channel flowing therein, an inlet and an outlet connected to the at least one channel for the cooling liquid to flow into and out of the channel respectively, wherein the inlet and the outlet are spatially separated at a distance, wherein said at least one channel defines a flow path of said cooling liquid for said cooling liquid to flow from said inlet to said outlet through a corresponding said channel, wherein said respective flow the path length of the path is substantially greater than the straight-line distance between the inlet and the outlet; a second heat sink having a first surface and an opposite second surface, attached to said heat sink such that said first surface of said second heat sink is substantially in contact with said first heat sink of said heat sink The two surfaces are in contact. 22. The cooling system according to claim 21, wherein the second surface of the second heat dissipation plate is suitable for mounting at least one second electronic component. 23. The cooling system of claim 22, wherein the at least one second electronic component includes a second power converter. 24. An electronic device comprising the cooling system according to claim 17 or 21. 25. The electronic device according to claim 24, further comprising a first heat dissipation plate having a first surface and an opposite second surface, additionally mounted on the heat dissipation plate to make the first heat dissipation The second surface of the plate is substantially in contact with the cooling system. 26. The electronic device according to claim 25, wherein the first surface of the first heat dissipation plate is suitable for mounting at least one first electronic component. 27. The electronic device according to claim 24, further comprising a second heat sink having a first surface and an opposite second surface, added to the heat sink so that the second heat sink The first surface of is substantially in contact with the cooling system. 28. The electronic device according to claim 27, wherein the second surface of the second heat sink is suitable for mounting at least one second electronic component. 29. The electronic device according to claim 24, further comprising at least one first electronic component and at least one second electronic component, installed in such a way that the cooling system is sandwiched between the at least one first electronic between the component and the at least one second electronic component. 30. The electronic device according to claim 29, wherein the at least one first electronic component and the at least one second electronic component are electrically connected to each other in a serial or parallel connection.

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