Heatsink assembly

Abstract

This invention provides a heat sink assembly that is an extruded heat sink but does not require a separate pipe for forming a flow channel. [Solution] The heat sink assembly 10 includes first to third heat sinks 101 to 103 in which a plurality of ribs 110 are integrally molded along the internal longitudinal direction by extrusion molding, the space between the ribs forms a flow path 112 for the flow of a coolant, the first and second surfaces 120 and 130 at both ends in the longitudinal direction are open, and a communication opening 140 is provided on one side wall adjacent to the second surface. The first to third heat sinks are integrally formed by the side walls forming a joint surface 142 so that the communication openings coincide. The ribs of the first to third heat sinks have a length such that both ends of the ribs are separated by a predetermined distance from the first and second surfaces. The open first and second surfaces at both ends of the first to third heat sinks are closed by end plugs 200 that are inserted so as to be separated from the ends of the ribs.

Description

Technical Field

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[0001] The present invention relates to a heat sink assembly that is mounted on the bottom surface of a battery pack equipped with a plurality of secondary batteries and promotes heat dissipation of the battery pack.

[0002] This application claims the benefit of priority based on Korean Patent Application No. 10-2023-0071921 filed on June 2, 2023, and all the contents disclosed in the literature of the Korean patent application are included as part of this specification.

Background Art

[0003] Unlike primary batteries, secondary batteries can be recharged and have been extensively researched and developed in recent years due to their potential for miniaturization and increased capacity. With the increasing technological development and demand for mobile devices, as well as the emergence of electric vehicles and energy storage systems in line with the contemporary requirements of environmental protection, the demand for secondary batteries as an energy source has been increasing even more rapidly.

[0004] Secondary batteries are classified into coin-type batteries, cylindrical batteries, prismatic batteries, and pouch-type batteries according to the shape of the battery case. The electrode assembly mounted inside the battery case in a secondary battery is a power generation element capable of charge and discharge, which consists of a laminated structure of electrodes and a separator.

[0005] Since secondary batteries are required to be used continuously over a long period, it is necessary to effectively control the heat generated during the charge and discharge process. If the cooling of the secondary battery is not smoothly performed, the temperature rise causes an increase in current, and the increase in current causes a positive feedback chain reaction that again causes a temperature rise, ultimately leading to a catastrophic state of thermal runaway.

[0006] To effectively dissipate the heat generated by secondary batteries, heat sinks (also called cooling plates) with flowing coolants are widely used. Heat sinks are attached to the bottom of a group of secondary batteries, such as a battery pack containing many secondary batteries, and perform a cooling function by absorbing the heat generated inside the pack with a coolant and releasing it to the outside.

[0007] Heat sinks can be divided into brazed heat sinks and extruded heat sinks depending on their structure or manufacturing method. Brazed heat sinks have a structure in which two plate materials are brazed together to form a flow channel. While this offers a high degree of freedom in flow channel design, it has the disadvantage of having poor structural rigidity due to the deterioration of the material's physical properties. In contrast, extruded heat sinks, which are manufactured as a continuous body by extrusion molding, have an advantage in structural rigidity, but only straight flow channels can be realized, resulting in many ports, which in turn occupies space for connecting pipes. [Overview of the project] [Problems that the invention aims to solve]

[0008] The present invention aims to provide a heat sink assembly that, despite being an extruded heat sink, does not require separate pipes for flow channel formation, occupies less space, and can improve differential pressure by reducing the number of parts with a simplified flow channel configuration.

[0009] However, the technical problems that the present invention aims to solve are not limited to those described above, and other problems not mentioned can be clearly understood by an ordinary person of the art from the description of the invention below. [Means for solving the problem]

[0010] The present invention relates to a heat sink assembly, in one example, comprising a first heat sink and a second heat sink, wherein a plurality of ribs are integrally molded along the internal longitudinal direction by extrusion, the spaces between the ribs form a flow path for a coolant, the first and second surfaces at both longitudinal ends are open, and a communication opening is provided on one side wall adjacent to the second surface, the first heat sink and the second heat sink are integrally formed by the side walls forming a joint surface such that the communication opening coincides, the ribs of the first heat sink and the second heat sink have a length such that both ends of the ribs are separated by a predetermined distance from the first and second surfaces, and the open first and second surfaces at both ends of the first and second heat sinks are closed by end plugs inserted so as to be separated from the ends of the ribs.

[0011] In one embodiment of the present invention, the first and second surfaces of the first and second heat sinks are each closed with one end plug, and incisions corresponding to the depth to which the end plug is inserted can be formed at both ends of the side walls of the upper first and second heat sinks that form the joint surface.

[0012] Either the first heat sink or the second heat sink is provided with an inlet port that communicates with the flow path, and the other heat sink is provided with an outlet port that communicates with the flow path.

[0013] The above-mentioned inlet and outlet ports may be located in the space between the end plug and the rib on the first surface.

[0014] Furthermore, the above-mentioned inlet and outlet ports may be located diagonally opposite to the above-mentioned communication opening.

[0015] Furthermore, the ribs of the first heat sink and the second heat sink may be configured such that one end on the first surface side moves away from the first surface as it approaches the joint surface, and the other end on the second surface side moves closer to the second surface as it approaches the joint surface.

[0016] On the other hand, in some embodiments of the present invention, a pair of modules of a first heat sink and a second heat sink are provided, which are integrally formed by the side walls of which align so that the communication openings coincide, and an outlet port provided in one module can be connected to an inlet port provided in the other module by a pipe member.

[0017] The heat sink assembly of the present invention further includes a third heat sink in which the second heat sink has another communication opening on the side wall adjacent to the first surface, a plurality of ribs integrally formed along the internal longitudinal direction by extrusion molding, the spaces between the ribs form a flow path for the refrigerant, the first and second surfaces at both longitudinal ends are open, and the second heat sink has a communication opening on one side wall adjacent to the first surface, the second and third heat sinks are integrally formed by the side walls forming a joint surface so that the communication openings coincide, the ribs of the third heat sink have a length such that both ends of the ribs are separated by a predetermined distance from the first and second surfaces, and the open first and second surfaces at both ends of the third heat sink can be closed with end plugs inserted so as to be separated from the ends of the ribs.

[0018] Furthermore, the first and second surfaces of the first, second, and third heat sinks are each closed with one end plug, and incisions corresponding to the depth to which the end plug is inserted can be formed at both ends of the side walls that form the joint surfaces of the first, second, and third heat sinks.

[0019] Either the first heat sink or the third heat sink may have an inlet port communicating with the flow path, and the other heat sink may have an outlet port communicating with the flow path.

[0020] Of the above-mentioned inlet and outlet ports, one of the ports may be located in the space between the end plug and the rib on the first surface, and the other port may be located in the space between the end plug and the rib on the second surface.

[0021] In one embodiment of the present invention, the inlet port and outlet port may be located diagonally opposite to the nearest adjacent communication port on the upstream side, with respect to the flow of the refrigerant.

[0022] In such a heat sink assembly of the present invention, the Nth heat sink (where N is a natural number greater than or equal to 3) and the (N+1)th heat sink are joined together to form a single unit such that their communication openings formed on one side wall coincide, and the open first and second surfaces at both ends of the (N+1)th heat sink can be continuously extended by closing them with end plugs that are inserted so as to be separated from the ends of ribs formed along the internal longitudinal direction. [Effects of the Invention]

[0023] The heat sink assembly of the present invention, having the above configuration, possesses excellent structural rigidity because the heat sink is manufactured as a continuous body by extrusion molding. Furthermore, by machining both longitudinal ends and side walls of the ribs integrally formed with the heat sink, an internal flow path is formed between the interconnected heat sinks, while the end plugs close the open surfaces, thereby enabling the creation of cooling flow paths divided into inlet and outlet sections.

[0024] As a result, the heat sink assembly of the present invention, while using an extruded heat sink as its basic framework which is advantageous in terms of structural rigidity, does not require a separate pipe for forming a flow path, occupies less space, improves differential pressure by reducing the number of parts with a simplified flow path configuration, and can easily expand the heat dissipation area by increasing the number of heat sinks that are joined.

[0025] However, the technical effects that can be obtained by the present invention are not limited to those described above, and other effects not mentioned can be clearly understood by an ordinary person of the art from the description of the invention below.

[0026] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further understand the technical idea of the present invention together with the detailed description of the invention to be described later. Therefore, the present invention should not be construed as being limited only to the matters described in such drawings.

Brief Description of the Drawings

[0027] [Figure 1] A drawing showing a heat sink assembly according to an embodiment of the present invention. [Figure 2] An exploded perspective view of the heat sink assembly. [Figure 3] A detailed view of the "A" part of FIG. 1. [Figure 4] A detailed view of the "B" part of FIG. 1. [Figure 5] A drawing showing the overall rib structure of the heat sink assembly of FIG. 1. [Figure 6] A drawing showing an embodiment of a heat sink assembly with a third heat sink added. [Figure 7] A drawing exemplarily showing a heat sink assembly including four heat sinks [Figure 8] A drawing showing the flow of refrigerant in a heat sink assembly including two heat sinks. [Figure 9] A drawing showing an embodiment in which the heat sink assembly of FIG. 8 is joined to both sides of a pack center frame. [Figure 10] A drawing showing an embodiment in which the heat sink assembly of FIG. 8 is joined to both sides of a pack center frame. [Figure 11] A drawing showing the refrigerant flow for the heat sink assembly of FIG. 6 in which three heat sinks are continuously joined. [Figure 12] A drawing showing the refrigerant flow for the heat sink assembly of FIG. 7 in which four heat sinks are continuously joined.

Modes for Carrying Out the Invention

[0028] The present invention can be modified in various ways and may have a variety of embodiments; therefore, specific embodiments are described in detail below.

[0029] However, this is not intended to limit the present invention to any particular embodiment, but rather should be understood to include all modifications, equivalents, or substitutions that fall within the spirit and technical scope of the present invention.

[0030] In the present invention, terms such as "includes" and "have" are intended to specify the presence of features, numbers, steps, operations, components, parts, or combinations thereof as described in the specification, and do not preemptively exclude the presence or possibility of adding one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0031] Furthermore, in this invention, when a part such as a layer, film, region, or plate is described as being "on top" of another part, this includes not only the case where it is "directly on top" of the other part, but also the case where another part is located in between. Conversely, when a part such as a layer, film, region, or plate is described as being "below" another part, this includes not only the case where it is "directly below" the other part, but also the case where another part is located in between. Also, in this application, being "on top" may include being located not only at the top but also at the bottom.

[0032] The present invention relates to a heat sink assembly, in one example, comprising a first heat sink and a second heat sink, wherein a plurality of ribs are integrally molded along the internal longitudinal direction by extrusion, the spaces between the ribs form a flow path for a coolant, the first and second surfaces at both longitudinal ends are open, and a communication opening is provided on one side wall adjacent to the second surface, the first heat sink and the second heat sink are integrally formed by the side walls forming a joint surface such that the communication opening coincides, the ribs of the first heat sink and the second heat sink have a length such that both ends of the ribs are separated by a predetermined distance from the first and second surfaces, and the open first and second surfaces at both ends of the first and second heat sinks are closed by end plugs inserted so as to be separated from the ends of the ribs.

[0033] The heat sink assembly of the present invention, having the above configuration, possesses excellent structural rigidity because the heat sink is manufactured as a continuous body by extrusion molding. Furthermore, by machining both longitudinal ends and side walls of the ribs integrally formed with the heat sink, an internal flow path is formed between the interconnected heat sinks, while the end plugs close the open surfaces, thereby enabling the creation of cooling flow paths divided into inlet and outlet sections.

[0034] As a result, the heat sink assembly of the present invention, while using an extruded heat sink as its basic framework which is advantageous in terms of structural rigidity, does not require a separate pipe for forming a flow path, occupies less space, improves differential pressure by reducing the number of parts with a simplified flow path configuration, and can easily expand the heat dissipation area by increasing the number of heat sinks that are joined.

[0035] Specific embodiments of the heat sink assembly 10 of the present invention will be described in detail below with reference to the attached drawings. For reference, the front-to-back and up-down-left-right directions used in the following description to specify relative positions are for the purpose of aiding the understanding of the invention, and unless otherwise defined, the directions shown in the drawings are used as the reference.

[0036] (First Embodiment) Figure 1 is a drawing showing a heat sink assembly 10 according to one embodiment of the present invention, Figure 2 is an exploded perspective view of the heat sink assembly 10, Figure 3 is a detailed view of part "A" in Figure 1, and Figure 4 is a detailed view of part "B" in Figure 1. The heat sink assembly 10 of the present invention will be described in detail with reference to the attached Figures 1 to 4.

[0037] The heat sink assembly 10 of the present invention includes a first heat sink 101, a second heat sink 102, and end plugs 200 for sealing the open surfaces of the first heat sink 101 and the second heat sink 102. The open surfaces of the first heat sink 101 and the second heat sink 102 are the surfaces at both ends in the longitudinal direction L, and for convenience of explanation, the two open surfaces are referred to as the first surface 120 and the second surface 130, respectively. Here, the longitudinal direction L is defined as the extrusion direction of the heat sink, i.e., the direction in which the ribs 110 are extended, and the width direction W is defined as the direction perpendicular to the longitudinal direction L in which the multiple ribs 110 are spaced apart.

[0038] The first heat sink 101 and the second heat sink 102 are manufactured with essentially the same structure. For example, the first heat sink 101 and the second heat sink 102 can be manufactured from an extruded product in which a plurality of ribs 110 are integrally molded along the internal longitudinal direction L by extrusion molding. The first heat sink 101 and the second heat sink 102 can be prepared by cutting the extruded product, which is manufactured in a continuous manner by extrusion molding, to a suitable length. In the first heat sink 101 and the second heat sink 102, the space between the spaced ribs 110 forms a flow path 112 for the refrigerant, and the first surface 120 and the second surface 130 at both ends in the longitudinal direction L are open due to the characteristics of the extruded product.

[0039] The first heat sink 101 and the second heat sink 102 are joined together by a joining process, such as friction stir welding, where one side wall of each heat sink is firmly joined to the other. On the side wall where the first heat sink 101 and the second heat sink 102 are joined to each other, i.e., the joining surface 142, machining is performed to form communication openings 140 for the first heat sink 101 and the second heat sink 102 before joining. The communication openings 140 on the joining surface 142 connect the flow paths 112 of the first heat sink 101 and the second heat sink 102 to each other.

[0040] Figure 3 shows a structure in which a communication opening 140 is processed by cutting a predetermined length inward from the end of the side wall. In other words, with reference to the drawing, the communication opening 140 is provided on one side wall adjacent to the second surface 130. Of course, it is also possible to form and join the communication opening 140 in the middle of the side wall, but it is preferable that the communication opening 140 be located at the end of the side wall in order to facilitate the flow of coolant between the first heat sink 101 and the second heat sink 102. Furthermore, processing the communication opening 140 by cutting a portion of the end of the side wall is also advantageous because it can be carried out all at once together with the processing for inserting the end plug 200, which will be described later.

[0041] Figure 4 shows a structure in which a space is formed into which the end plug 200 is inserted, and into which the coolant flowing in and out of the first heat sink 101 and the second heat sink 102 can be distributed to the flow path 112 between each rib 110. Such a space is created by machining a predetermined length from the ends of the ribs 110 that can be approached via the first surface 120 and the second surface 130.

[0042] As shown in the exploded perspective view of Figure 2, the end plug 200 comprises a front face 210 and an insert 220. The insert 220 is a protruding portion sandwiched in the space between the upper and lower plates of the first heat sink 101 and the second heat sink 102, and has a length corresponding to the internal width length (distance between the inner surfaces of the side walls) of the first heat sink 101 and the second heat sink 102. For example, the end plug 200 can be sealed and joined to the first heat sink 101 and the second heat sink 102 by sequential friction stir welding performed on the upper and lower plates of the first heat sink 101 and the second heat sink 102. By ensuring that the welding depths of the friction stir welding performed vertically overlap, a seal can be completed on all four sides (top, bottom, left, and right) of the first surface 120 and the second surface 130.

[0043] Referring again to Figure 4, the rib 110 on the first surface 120 is machined to a length suitable for the insertion depth of the insert 220 of the end plug 200 and for the formation of a space between the end plug 200 and the rib 110 from which the coolant can flow in and out. As a result, the ribs 110 of the first heat sink 101 and the second heat sink 102 have a length such that both ends of the rib are separated from the first surface 120 by a predetermined distance, and the ends of the rib 110 are separated from the insert 220 of the end plug 200. Of course, the same machining is performed on the rib 110 on the second surface 130.

[0044] In one embodiment of the present invention, the first surface 120 and the second surface 130 of the first heat sink 101 and the second heat sink 102 can each be closed with a single end plug 200. For this purpose, both ends of the side walls of the first heat sink 101 and the second heat sink 102 that form the joint surface 142 can have incisions 150 that correspond to the depth into which the end plug 200 is inserted, i.e., the length of the insert 220.

[0045] In machining the incision portion 150, the incision portion 150 and the communication opening 140 can be formed simultaneously. That is, when forming the incision portion 150 at the end of the joint surface 142 of the second surface 130, the incision portion 150 and the communication opening 140 can be formed simultaneously by cutting deeper by the length of the communication opening 140. The outside of the communication opening 140 is sealed by the insert 220 of the end plug 200, and by forming the communication opening 140 continuously with the incision portion in this way, the machining procedure is simplified.

[0046] Figure 5 is a diagram showing the overall structure of the ribs 110 of the heat sink assembly 10. The total length of each rib 110 is approximately the same, but the positions of the ends of each rib 110 are different. This varied structure of the ribs 110 is created by adjusting the machining depth of the cutting tool approaching through the first surface 120 and the second surface 130.

[0047] As shown in Figure 5, the ribs 110 of the first heat sink 101 and the second heat sink 102 may be configured such that one end on the first surface 120 side gradually moves away from the first surface 120 as it approaches the central joint surface 142, and the other end on the second surface 130 side moves closer to the second surface 130 as it approaches the joint surface 142. In other words, since the insert 220 of the end plug 200 is a flat plate shape with a constant protruding length, the arrangement of the ribs 110 as described above causes the refrigerant flow space between the end plug 200 and the ribs 110 on the first surface 120 and the second surface to change depending on the position. This is to promote the smooth flow of the refrigerant, which will be explained in the third embodiment.

[0048] (Second Embodiment) Figure 6 shows a second embodiment in which the heat transfer area of ​​the heat sink assembly 10 is expanded by adding another third heat sink 103 in the width direction W to the first heat sink 101 and second heat sink 102 described in the first embodiment.

[0049] Since the third heatsink 103 has the same structure as the first heatsink 101 and the second heatsink 102, a redundant explanation of the third heatsink 103 will be omitted. However, since the second heatsink 102 must be joined to the third heatsink 103 at the same time as being joined to the first heatsink 101, the second heatsink 102 is modified to have another communication opening 140 on the side wall adjacent to the first surface 120. The communication opening 140 added adjacent to the first surface 120 is formed on the side wall opposite to the communication opening 140 adjacent to the second surface 130. That is, the two communication openings 140 provided on the second heatsink 102 are located in diagonal directions to each other, with the side walls on which they are formed being changed.

[0050] The third heat sink 103 has essentially the same structure as the first heat sink 101 and the second heat sink 102, except that the position of the communication port 140 is adjusted to achieve fluid connection with the second heat sink 102. That is, the third heat sink 103 is also manufactured from the same extruded part. The communication port 140 of the third heat sink 103 is located on one side wall adjacent to the first surface 120 so as to connect to the communication port 140 added to the second heat sink 102. The first heat sink 101, the second heat sink 102, and the third heat sink 103 all become a single unit by the side walls forming another joining surface 142 so that their communication ports 140 coincide.

[0051] In the third heat sink 103, both ends of the rib 110 have a length that is separated by a predetermined distance from the first surface 120 and the second surface 130, and the open first surface 120 and the second surface 130 at both ends of the third heat sink 103 are closed by end plugs 200 that are separated from the ends of the rib 110. Furthermore, as described in the first embodiment, the first surface 120 and the second surface 130 of the first heat sink 101, the second heat sink 102, and the third heat sink 103 are each closed by one end plug 200, and cuts 150 corresponding to the depth into which the end plugs 200 are inserted can be formed at both ends of the side walls of the first heat sink 101, the second heat sink 102, and the third heat sink 103 that form the joint surface 142.

[0052] From the above description, it can be clearly understood that the heat sink assembly 10 of the present invention can be extended in the same manner along the width direction W by adding four or more heat sinks. For example, with reference to the heat sink assembly 10 of Figure 6, which includes a first heat sink 101, a second heat sink 102, and a third heat sink 103, the Nth heat sink (where N is a natural number greater than or equal to 3) and the (N+1)th heat sink can be joined together to form a single unit with communication openings 140 formed on one side wall coinciding, and the open first and second surfaces 120 and 130 at both ends of the (N+1)th heat sink can be continuously extended by closing them with end plugs 200 that are inserted so as to be separated from the ends of ribs 110 formed along the internal longitudinal direction L. Figure 7 illustrates a heat sink assembly 10 including four heat sinks, with the addition of a fourth heat sink 104.

[0053] In the heat sink assembly 10 of the present invention, since each heat sink is prepared from the same extruded product, the only additional accessories that need to be prepared separately are a single end plug 200 that integrally closes the first surface 120 and the second surface 130, thus simplifying the components. Of course, the position of the communication opening 140 must alternate, but since the position of the communication opening 140 is adjusted by machining, the heat sink assembly 10 of the present invention is highly expandable in this respect.

[0054] (Third embodiment) In the third embodiment, various embodiments in which the refrigerant flows into and out of the heat sink assembly 10 of the first and second embodiments described above will be explained.

[0055] Figure 8 is a diagram showing the flow of refrigerant in a heat sink assembly 10 that includes two heat sinks. As can be seen in Figure 8, one of the heat sinks, the first heat sink 101 or the second heat sink 102, has an inlet port 310 that communicates with the internal flow path 112, and the other heat sink has an outlet port 320 that communicates with the internal flow path 112.

[0056] Since the communication port 140 that fluidly connects the first heat sink 101 and the second heat sink 102 is close to the second surface 130, it is preferable that the inlet port 310 and outlet port 320 be located on the first surface 120 diagonally opposite to the communication port 140 in order to ensure a sufficiently long flow path. The inlet port 310 and outlet port 320 are located in the space between the end plug 200 and the rib 110 on the first surface 120. Since the space between the end plug 200 and the rib 110 is a space shared by each flow path 112, the port 300 is positioned so that the refrigerant flows in and out through this space, allowing the refrigerant to flow smoothly through all the flow paths 112.

[0057] Figures 9 and 10 are drawings showing embodiments in which the heat sink assemblies 10 of Figure 8 are joined to both sides of the pack center frame 400, respectively. The embodiments of Figures 9 and 10 differ in the flow mode of the refrigerant formed in the heat sink assembly 10.

[0058] In the embodiment shown in Figure 9, the heat sink assembly 10 of Figure 8 becomes a single module 105 (first heat sink and second heat sink module), and the flow paths 112 are connected to each other to form an expanded heat sink assembly 10. Each module 105 is joined to the pack center frame 400, but the modules 105 are not joined to each other, which is a slight difference from the expansion by joining heat sinks to each other as described in the second embodiment. Each module 105 with the pack center frame 400 in between is fluidly connected when an outlet port 320 provided in one module 105 is connected to an inlet port 310 provided in another module 105 by a pipe member 330.

[0059] In contrast, the embodiment in Figure 10 is the same in that two modules 105 are joined to the pack center frame 400, but each module 105 is not fluidly connected to one another. Such embodiments have the advantage of being able to configure a variety of refrigerant inflow and outflow patterns. For example, as in Figure 10, by configuring the ports 300 of each module 105 adjacent to the pack center frame 400 as inlet ports 310, the design can be made so that the refrigerant temperature on the pack center frame 400 side is kept relatively low.

[0060] Figure 11 is a diagram showing the refrigerant flow in the heat sink assembly 10 of Figure 6, in which three heat sinks are joined in a continuous manner. Either the first heat sink 101 or the third heat sink 103 has an inlet port 310 that communicates with the flow path 112, and the other heat sink has an outlet port 320 that communicates with the flow path 112. As a result, the first heat sink 101, the second heat sink 102, and the third heat sink 103 are connected in series along their respective flow paths 112, causing the refrigerant to flow in one direction. Since the flow paths 112 of the first heat sink 101, the second heat sink 102, and the third heat sink 103 are internally connected via a communication port 140, it is sufficient for the heat sink assembly 10 to have only one inlet port 310 and one outlet port 320.

[0061] As shown in Figure 11, one of the inlet port 310 and outlet port 320 is located in the space between the end plug 200 and the rib 110 on the first surface 120, and the other port 300 is located in the space between the end plug 200 and the rib 110 on the second surface 130. In order to maximize the length of the overall flow path 112, if the inlet port 310 and outlet port 320 are positioned diagonally with respect to the nearest adjacent communication opening 140 on the upstream side (relative to the flow of refrigerant), then, since the number of heat sinks is odd, the inlet port 310 and outlet port 320 are arranged diagonally.

[0062] Figure 12 is a diagram showing the coolant flow in the heat sink assembly 10 of Figure 7, in which four heat sinks are joined in a continuous manner. The flow pattern is basically the same as that of the heat sink assembly 10 of Figure 11, the only difference being that the inlet port 310 and outlet port 320 are located on the same first surface 120 (based on Figure 12) because the number of heat sinks is even.

[0063] The present invention has been described in more detail above through the drawings and embodiments. However, the configurations described in the drawings or embodiments described herein are merely one embodiment of the present invention and do not represent the entire technical concept of the present invention. Therefore, there may be various equivalents and modifications that can substitute for them at the time of filing. [Explanation of Symbols]

[0064] 10: Heatsink Assembly 100: Heatsink 101: First heatsink 102: Second heatsink 103: Third heatsink 104: 4th heatsink 105: Heatsink Module 110: Rib 112: Flow channel 120: 1st page 130:Second side 140: Connecting port 142: Joint surface 150: Incision site 200: End plug 210:Front 220: Insert 300: Port 310: Entrance Port 320: Exit port 330: Pipe components 400: Pack Center Frame L: Long direction W: width direction

Claims

1. The heat sink includes a first heat sink and a second heat sink, each having multiple ribs integrally molded along the internal longitudinal direction by extrusion molding, the spaces between the ribs forming a flow path for the coolant, the first and second surfaces at both ends in the longitudinal direction being open, and a communication opening on one side wall adjacent to the second surface. The first heat sink and the second heat sink are integrally formed by the side walls forming a joint surface such that the communication openings coincide. The ribs of the first heat sink and the second heat sink have a length such that both ends of the ribs are separated by a predetermined distance from the first surface and the second surface. A heat sink assembly in which the open first and second surfaces at both ends of the first and second heat sinks are closed with end plugs inserted so as to be spaced away from the ends of the ribs.

2. The first and second surfaces of the first and second heat sinks are each closed with one end plug. The heat sink assembly according to claim 1, wherein the first heat sink and the second heat sink have notches formed at both ends of the side walls that form the joining surfaces, corresponding to the depth to which the end plugs are inserted.

3. The heat sink assembly according to claim 1 or 2, wherein either the first heat sink or the second heat sink has an inlet port communicating with the flow path, and the other heat sink has an outlet port communicating with the flow path.

4. The aforementioned inlet port and outlet port are, The heat sink assembly according to claim 3, located in the space between the end plug and the rib on the first surface.

5. The aforementioned inlet port and outlet port are, The heat sink assembly according to claim 4, which is located diagonally opposite to the aforementioned communication port.

6. The ribs of the first heat sink and the second heat sink are The heat sink assembly according to claim 5, wherein one end on the first surface side moves away from the first surface as it approaches the joining surface, and the other end on the second surface side moves closer to the second surface as it approaches the joining surface.

7. A pair of modules, the first heat sink and the second heat sink, are provided, which form an integral unit by the side walls forming the joint surface so that the communication openings coincide. The heat sink assembly according to claim 5, wherein the outlet port provided on one module is connected to the inlet port provided on another module by a pipe member.

8. The second heat sink is provided with another communication opening on the side wall adjacent to the first surface, The third heat sink is further formed by extrusion molding, in which a plurality of ribs are integrally molded along the internal longitudinal direction, the spaces between the ribs form a flow path for the refrigerant, the first and second surfaces at both ends in the longitudinal direction are open, and a communication opening is provided on one side wall adjacent to the first surface. The second heat sink and the third heat sink are integrally formed by the side walls forming a joint surface such that the communication openings coincide. The ribs of the third heat sink have a length such that both ends of the ribs are separated by a predetermined distance from the first and second surfaces. The heat sink assembly according to claim 1 or 2, wherein the open first and second surfaces at both ends of the third heat sink are closed with end plugs inserted so as to be spaced away from the ends of the ribs.

9. The first and second surfaces of the first, second, and third heatsinks are each closed with one end plug. The heat sink assembly according to claim 8, wherein the first heat sink, the second heat sink, and the third heat sink have notches formed at both ends of the side walls that form the joining surfaces, corresponding to the depth to which the end plugs are inserted.

10. The heat sink assembly according to claim 8, wherein either the first heat sink or the preceding third heat sink has an inlet port communicating with the flow path, and the other heat sink has an outlet port communicating with the flow path.

11. Of the aforementioned inlet port and outlet port, Either port is located in the space between the end plug and the rib on the first surface, The heat sink assembly according to claim 10, wherein the other port is located in the space between the end plug and the rib on the second surface.

12. The aforementioned inlet port and outlet port are, The heat sink assembly according to claim 11, which is positioned diagonally to the nearest adjacent communication port on the upstream side, with reference to the flow of the refrigerant.

13. The Nth heatsink (where N is a natural number greater than or equal to 3) and the (N+1)th heatsink are joined together so that their communication openings, formed on one side wall, coincide, forming a single unit. The heat sink assembly according to claim 8, wherein the open first and second surfaces at both ends of the (N+1)th heat sink are closed with end plugs inserted so as to be spaced away from the ends of ribs formed along the internal longitudinal direction.

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