Heat dissipation member and battery pack including same

Abstract

A heat dissipation member according to an embodiment of the present invention includes a heat dissipation member including a first heat dissipation portion and a second heat dissipation portion, and a heat insulating member formed along an outer surface of the heat dissipation member.

Description

[Technical field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims the benefit of priority based on Korean Patent Application No. 10-2021-0156869 dated November 15, 2021, and all contents disclosed in the documents of that Korean patent application are incorporated herein by reference.

[0002] The present invention relates to a heat dissipation member and a battery pack including the same, and more specifically, to a heat dissipation member that effectively dissipates heat while preventing heat transmission between adjacent battery modules and a battery pack including the same. [Background technology]

[0003] As technological development and demand for mobile devices increases, the demand for secondary batteries as an energy source is rapidly increasing. In particular, secondary batteries are attracting much attention not only for mobile devices such as mobile phones, digital cameras, laptops, and wearable devices, but also as an energy source for power devices such as electric bicycles, electric cars, and hybrid electric cars.

[0004] Small mobile devices use one, two, three, or four battery cells per device, while medium- to large-sized devices such as automobiles require high output and large capacity. Therefore, medium- to large-sized battery modules that electrically connect multiple battery cells are used.

[0005] Since it is preferable for medium- to large-sized battery modules to be manufactured with as small a size and weight as possible, prismatic batteries and pouch-shaped batteries, which can be stacked with a high degree of integration and have a small weight relative to their capacity, are mainly used as battery cells for medium- to large-sized battery modules.

[0006] However, conventional battery packs include multiple battery modules, and if thermal runaway occurs in some of the battery cells of each battery module, causing a fire or explosion, the heat or flame may be transferred to an adjacent secondary battery, causing a secondary explosion. As a result, efforts are being made to prevent secondary fires or explosions.

[0007] Therefore, there is a need to develop a heat dissipation member and a battery pack including the same that can effectively dissipate the generated heat while preventing the heat from being transferred to adjacent battery modules when a battery module in a battery pack ignites or explodes. Summary of the Invention [Problem to be solved by the invention]

[0008] The problem to be solved by the present invention relates to a heat dissipation member that effectively dissipates heat while preventing heat transfer between adjacent battery modules, and a battery pack including the same.

[0009] However, the problems that the present invention is intended to solve are not limited to those mentioned above, and problems not mentioned will be clearly understood by those having ordinary skill in the art to which the present invention pertains from this specification and the attached drawings. [Means for solving the problem]

[0010] A heat dissipation member according to an embodiment of the present invention includes a heat dissipation member including a first heat dissipation portion and a second heat dissipation portion, and a heat insulating member formed along an outer surface of the heat dissipation member.

[0011] The first heat dissipating part and the second heat dissipating part may be integrally formed, and a portion of the first heat dissipating part and the second heat dissipating part may be formed to be spaced apart from each other.

[0012] The first heat dissipating part and the second heat dissipating part may be bent and extended, and the first heat dissipating part and the second heat dissipating part may be bent in opposite directions.

[0013] The heat dissipation member may further include a first recess formed in the first heat dissipation portion and a second recess formed in the second heat dissipation portion.

[0014] The heat dissipation member may further include a cooling member formed in the first recess and the second recess.

[0015] The heat dissipation member may further include a first indentation formed in the first heat dissipation portion and a second indentation formed in the second heat dissipation portion, and the first indentation and the second indentation may be formed to be in contact with each other.

[0016] A battery pack according to another embodiment of the present invention includes a plurality of battery modules and a heat dissipation member located between adjacent battery modules among the plurality of battery modules, the heat dissipation member including a heat dissipation member having a first heat dissipation portion and a second heat dissipation portion, and a heat insulating member formed along an outer surface of the heat dissipation member.

[0017] The heat insulating member may be formed between the heat dissipating member and the battery module.

[0018] The heat insulating member may be formed to be in contact with the battery module.

[0019] The first heat dispersing part and the second heat dispersing part of the battery pack may be integrally formed, and the first heat dispersing part and the second heat dispersing part may be spaced apart from each other.

[0020] The first heat dispersing part and the second heat dispersing part of the battery pack may be bent and extended, and the first heat dispersing part and the second heat dispersing part may be bent in opposite directions.

[0021] The battery pack may further include a first indentation formed in the first heat dispersing portion and a second indentation formed in the second heat dispersing portion, and the first indentation and the second indentation may be formed to contact each other.

[0022] The battery pack may further include a first recess formed in the first heat dispersing part and a second recess formed in the second heat dispersing part.

[0023] The battery pack may further include a cooling member formed in the first recess and the second recess.

[0024] The battery pack may further include a pack frame that houses the plurality of battery modules, and the cooling member may be in contact with an upper portion of the pack frame.

[0025] The cooling member may be in contact with an upper inner surface of the pack frame.

[0026] The battery pack according to still another embodiment of the present invention may further include a thermally conductive resin layer formed between a lower portion of the battery module and a bottom portion of the pack frame.

[0027] The battery pack may further include a heat sink formed between the thermally conductive resin layer and a bottom of the pack frame. Effect of the Invention

[0028] According to one aspect of the present invention, in a heat dissipation member and a battery pack including the same, a heat dissipation member included in the heat dissipation member is positioned between insulating members, and a spaced apart space is formed between each heat dissipation member, thereby effectively dissipating heat while preventing heat transmission between battery modules.

[0029] The effects of the present invention are not limited to the effects described above, and effects not mentioned will be clearly understood by those having ordinary skill in the art to which the present invention pertains from this specification and the accompanying drawings. [Brief description of the drawings]

[0030] [Figure 1] 1 is a perspective view showing a heat dissipation member according to an embodiment of the present invention; [Diagram 2] 2 is a diagram showing a heat dispersion member included in the heat dissipation member of FIG. 1. [Diagram 3] 3 is a cross-sectional view of the heat dispersion member of FIG. 2. [Figure 4] 2 is a diagram showing a state in which a heat dispersion member and a heat insulating member included in the heat dissipation member of FIG. 1 are joined together. [Diagram 5] 5 is a diagram showing a state in which a heat dissipation member is formed by combining a cooling member with the heat dispersion member and the heat insulating member in FIG. 4. [Figure 6] FIG. 13 illustrates a battery pack according to another embodiment of the present invention. [Figure 7] FIG. 13 is a diagram showing a battery pack according to still another embodiment of the present invention. [Figure 8] 8 is a perspective view showing a battery module included in the battery pack of FIG. 6 and FIG. 7. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0031] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings, in which: FIG. 1 is a block diagram of a semiconductor device according to an embodiment of the present invention;

[0032] In order to clearly explain the present invention, unnecessary parts will be omitted, and the same reference numerals will be used throughout the specification to refer to the same or similar components.

[0033] In addition, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and the present invention is not necessarily limited to those shown in the drawings. In the drawings, the thicknesses of various layers and regions are exaggerated to clearly express the layers and regions. In the drawings, the thicknesses of some layers and regions are exaggerated to facilitate explanation.

[0034] In addition, when a part such as a layer, film, region, or plate is said to be "on" or "above" another part, this includes not only the case where it is "directly on" the other part, but also the case where there is another part in between. Conversely, when a part is said to be "directly on" another part, it means that there is no other part in between. In addition, being "on" or "above" a reference part means being located above or below the reference part, and does not necessarily mean being located "on" or "above" the direction against gravity.

[0035] In addition, throughout the specification, when a part is said to "comprise" a certain element, this means that it may further include other elements, but not excluding other elements, unless specifically stated to the contrary.

[0036] Also, throughout the specification, "in a plane" means when the subject part is viewed from above, and "in cross section" means when the subject part is cut vertically and viewed from the side.

[0037] The terms first and second used in this application may be used to describe various components, but the components should not be limited by the terms. The terms are used only to distinguish one component from another component.

[0038] Hereinafter, a heat dissipation member according to one embodiment of the present invention will be described with reference to FIGS.

[0039] Fig. 1 is a perspective view showing a heat dissipation member according to an embodiment of the present invention. Fig. 2 is a diagram showing a heat dispersion member included in the heat dissipation member of Fig. 1. Fig. 3 is a diagram showing a cross section of the heat dispersion member of Fig. 2. Fig. 4 is a diagram showing a state in which the heat dispersion member and a heat insulating member included in the heat dissipation member of Fig. 1 are combined. Fig. 5 is a diagram showing a state in which a cooling member is combined with the heat dispersion member and the heat insulating member of Fig. 4 to form a heat dissipation member.

[0040] 1 and 2, a heat dissipation member 100 according to the present embodiment includes a heat dissipation member 150 including a first heat dissipation portion 151 and a second heat dissipation portion 152. As shown in FIG.

[0041] The heat dissipating member 150 may include a first heat dissipating part 151 and a second heat dissipating part 152 that are integrally formed. At this time, the first heat dissipating part 151 and the second heat dissipating part 152 may be formed to be partially separated from each other. Therefore, a space may be formed between the first heat dissipating part 151 and the second heat dissipating part 152.

[0042] The first heat dissipating part 151 and the second heat dissipating part 152 may be bent and extended, and the first heat dissipating part 151 and the second heat dissipating part 152 may be bent in opposite directions. Specifically, the first heat dissipating part 151 may refer to the left region based on the center of the heat dissipating member 150 (FIG. 2), and the second heat dissipating part 152 may refer to the right region. Therefore, the first heat dissipating part 151 and the second heat dissipating part 152 may have bent parts by being farther away from the lower end of the heat dissipating member 150 where the first heat dissipating part 151 and the second heat dissipating part 152 are integrated. Therefore, by being bent as described above, the first heat dissipating part 151 and the second heat dissipating part 152 may have extended parts bent in opposite directions.

[0043] 2 and 3, the heat dissipation member 100 according to the present embodiment may further include a first recess 156 formed in the first heat dissipation part 151 and a second recess 157 formed in the second heat dissipation part 152. In this case, the first recess 156 may be formed in the bent extension part of the first heat dissipation part 151, and the second recess 157 may be formed in the bent extension part of the second heat dissipation part 152.

[0044] Also, the heat dissipating member 100 may further include a first indentation 158 formed in the first heat dissipating portion 151 and a second indentation 159 formed in the second heat dissipating portion 152. At this time, the first indentation 158 and the second indentation 159 may be formed adjacent to the lower end of the heat dissipating member 150 where the first heat dissipating portion 151 and the second heat dissipating portion 152 are integrated. In particular, the first indentation 158 and the second indentation 159 may be formed to contact each other, and by the first indentation 158 and the second indentation 159 contacting each other, the heat transferred to the first heat dissipating portion 151 or the second heat dissipating portion 152 is quickly transferred to the second heat dissipating portion 152 or the first heat dissipating portion 151. This allows an additional heat transfer path to be formed within the heat dissipation member 150 in addition to the heat transfer path through the lower end of the heat dissipation member 150 in which the first heat dissipation part 151 and the second heat dissipation part 152 are integrated, thereby improving the heat dissipation performance of the heat dissipation member 150.

[0045] 5, the heat dissipation member 100 of FIG. 2 according to the present embodiment may further include a cooling member 170 formed in the first recess 156 and the second recess 157. In this case, the cooling member 170 may be a cooling pad. The cooling pad may be made of a silicon-based or acrylic-based material. In particular, the cooling pad may be a silicon pad, a silicon rubber pad, a silicon polymer pad, an acrylic pad, an acrylic polymer pad, etc., but is not limited thereto. The cooling member 170 may cool the heat transferred from the heat dissipation member 150 of the heat dissipation member 100.

[0046] 4 and 5, the heat dissipation member 100 according to the present embodiment includes a heat insulating member 130 formed along the outer surface of the heat dissipation member 150. Specifically, the heat insulating member 130 may be formed on a portion of the outer surface of the heat dissipation member 150. More specifically, the heat insulating member 130 may be formed on the outer surface of the lower end of the bent extension portion of the outer surface of the heat dissipation member 150.

[0047] The heat insulating member 130 may not be formed on the inner surface of the heat dissipating member 150. In this case, the space formed between the first heat dissipating portion 151 and the second heat dissipating portion 152 of the heat dissipating member 150 may be referred to as the inner surface of the heat dissipating member 150. Therefore, the heat insulating member 130 may not be formed on the inner surface of the heat dissipating member 150. This can facilitate heat transfer between the first heat dissipating portion 151 and the second heat dissipating portion 152 of the heat dissipating member 150. In particular, the heat insulating member 130 can serve to block the heat transfer of heat transferred from one heat dissipating portion 151, 152, and therefore can act as an element that prevents the transferred heat from transferring to the other heat dissipating portion 152, 151. Therefore, the heat insulating member 130 according to the present embodiment is not formed on the inner surface of the heat dissipating member 150, and therefore the heat transfer between the first heat dissipating portion 151 and the second heat dissipating portion 152 can be ensured.

[0048] At this time, the portion where the heat insulating member 130 is formed may be a portion that contacts the module frame 18 of the battery module 10, as described below. Therefore, depending on the configuration of the heat insulating member 130, when a battery module 10 catches fire, the heat generated can be effectively dispersed while preventing the heat from being transferred to an adjacent battery module 10.

[0049] Also, the heat dissipating member 150 may be made of materials such as aluminum (Al), graphite, etc. However, the material of the heat dissipating member 150 is not limited to these, and any material having high thermal conductivity is included in this embodiment.

[0050] Also, the heat insulating member 130 may include a ceramic material. For example, the ceramic material may be a material such as ceramic fiber. However, the material of the heat insulating member 130 is not limited thereto, and any material having high heat insulating properties may be included in the present embodiment.

[0051] Hereinafter, a battery pack according to another embodiment of the present invention will be described with reference to Figures 6 to 8. The battery pack may include all of the contents of the heat dissipation member described above.

[0052] Fig. 6 is a view showing a battery pack according to another embodiment of the present invention, Fig. 7 is a view showing a battery pack according to still another embodiment of the present invention, and Fig. 8 is a perspective view showing a battery module included in the battery pack of Figs. 6 and 7.

[0053] 6 to 8, the battery pack 1000 according to the present embodiment includes a plurality of battery modules 10, a pack frame 1100 that houses the plurality of battery modules 10, and a heat dissipation member 100 that is positioned between adjacent battery modules 10 among the plurality of battery modules 10.

[0054] 8, the battery module 10 included in the battery pack 1000 according to the present embodiment may include a plurality of battery cells 11 stacked in a preset direction and then mounted on a module frame 18. There is no particular limitation on the type of the plurality of battery cells 11, and the battery cells may be pouch-type secondary batteries or prismatic secondary batteries.

[0055] In this case, the heat dissipation member 100 may include all of the above-mentioned features. That is, the heat dissipation member 150 may include a first heat dissipation part 151 and a second heat dissipation part 152 that are integrally formed as shown in Fig. 2. In this case, the first heat dissipation part 151 and the second heat dissipation part 152 may be formed such that a part of them is separated from each other. Therefore, a space may be formed between the first heat dissipation part 151 and the second heat dissipation part 152.

[0056] The first heat dissipating part 151 and the second heat dissipating part 152 may be folded and extended, and the first heat dissipating part 151 and the second heat dissipating part 152 may be folded in opposite directions. Specifically, the first heat dissipating part 151 may refer to the left region based on the center of the heat dissipating member 150 (FIG. 2), and the second heat dissipating part 152 may refer to the right region. Therefore, the first heat dissipating part 151 and the second heat dissipating part 152 may have folded parts by being farther away from the lower end of the heat dissipating member 150 where the first heat dissipating part 151 and the second heat dissipating part 152 are integrated. Therefore, by being folded as described above, the first heat dissipating part 151 and the second heat dissipating part 152 may have extended parts folded in opposite directions. At this time, the extended parts folded in opposite directions as described above may be disposed in the battery pack 1000 so as to be adjacent to the upper part of the battery module 10. That is, the heat dissipation member 100 may be fixed between a pair of battery modules 10 such that the bent extended portion of the heat dissipation member 150 is adjacent to the upper portion of the battery module 10 .

[0057] Meanwhile, the heat dissipation member 100 according to the present embodiment may further include a first recess 156 formed in the first heat dissipation part 151 and a second recess 157 formed in the second heat dissipation part 152. In this case, the first recess 156 may be formed in the bent extension part of the first heat dissipation part 151, and the second recess 157 may be formed in the bent extension part of the second heat dissipation part 152. In particular, the first recess 156 and the second recess 157 may be formed to be adjacent to the upper part of the battery module 10.

[0058] Also, the heat dissipation member 100 may further include a first indentation 158 formed in the first heat dissipation part 151 and a second indentation 159 formed in the second heat dissipation part 152. In this case, the first indentation 158 and the second indentation 159 may be formed adjacent to the lower end of the heat dissipation member 150 where the first heat dissipation part 151 and the second heat dissipation part 152 are integrated. That is, the first indentation 158 and the second indentation 159 may be formed to be located between the pair of battery modules 10, and more specifically, may be formed adjacent to a side portion of the module frame 18 of the battery module 10.

[0059] At this time, the first indentation 158 and the second indentation 159 may be formed to contact each other, and as the first indentation 158 and the second indentation 159 contact each other, heat transferred to the first heat dissipating part 151 or the second heat dissipating part 152 is quickly transferred to the second heat dissipating part 152 or the first heat dissipating part 151. That is, in addition to the heat transfer path through the lower end of the heat dissipating member 150 in which the first heat dissipating part 151 and the second heat dissipating part 152 are integrated, an additional heat transfer path can be formed within the heat dissipating member 150 through the contact, thereby improving the heat dissipating performance of the heat dissipating member 150.

[0060] Also, the heat dissipating member 150 may be made of materials such as aluminum (Al), graphite, etc. However, the material of the heat dissipating member 150 is not limited to these, and any material having high thermal conductivity may be included in this embodiment.

[0061] Here, the heat dissipation member 100 according to the present embodiment may further include a cooling member 170 formed in the first recess 156 and the second recess 157. Here, the cooling member 170 may be a cooling pad. The cooling member 170 may cool the heat transferred from the heat dissipation member 150 of the heat dissipation member 100. Also, the cooling member 170 according to the present embodiment may be in contact with the upper portion 1100a of the pack frame 1100. More specifically, the cooling member 170 may be in contact with an inner surface of the upper portion 1100a of the pack frame 1100. Therefore, when a fire occurs in the battery module 10, thermal energy can be quickly transferred through the heat dissipation member 100 and the upper portion 1100a of the pack frame 1100 and released to the outside.

[0062] Meanwhile, the heat dissipation member 100 according to the present embodiment includes a heat insulating member 130 formed along the outer surface of the heat dissipation member 150. Specifically, the heat insulating member 130 may be formed on a part of the outer surface of the heat dissipation member 150. More specifically, the heat insulating member 130 may be formed on the outer surface of the lower end of the bent extension part of the outer surface of the heat dissipation member 150.

[0063] Also, the heat insulating member 130 may include a ceramic material. For example, the ceramic material may be a material such as ceramic fiber. However, the material of the heat insulating member 130 is not limited thereto, and any material having high heat insulating properties may be included in the present embodiment.

[0064] Furthermore, according to this embodiment, the heat insulating member 130 of the heat dissipation member 100 can be formed between the heat dissipation member 150 and the battery modules 10. More specifically, one side of one of the pair of battery modules 10 may be in contact with the heat insulating member 130, and one side of the other of the pair of battery modules 10 may also be in contact with the heat insulating member 130. Thus, the heat insulating member 130 may be formed to be in contact with the battery modules 10.

[0065] As a result, in this embodiment, when some battery modules ignite or explode, heat transmission between adjacent battery modules 10 can be blocked by the insulating member 130 of the heat dissipation member 100, thereby preventing successive fires or explosions due to heat transmission between adjacent battery modules 10.

[0066] 7, a battery pack 1000 according to another embodiment of the present invention may further include a thermally conductive resin layer 1200 formed between a lower portion of the battery module 10 and a bottom 1100b of the pack frame 1100. The battery pack 1000 may further include a heat sink 1300 formed between the thermally conductive resin layer 1200 and the bottom 1100b of the pack frame 1100. Therefore, heat generated from the battery module 10 can be transferred to the bottom 1100b of the pack frame 1100 through the thermally conductive resin layer 1200 and the heat sink 1300 as well as the heat dissipation member 100, and then dissipated to the outside.

[0067] The battery pack can be applied to various devices, including vehicles such as electric bicycles, electric cars, and hybrid cars, but the present invention is not limited thereto and can be applied to various devices that can use a battery module, which also fall within the scope of the present invention.

[0068] Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and various modifications may be made by a person having ordinary knowledge in the technical field to which the invention pertains without departing from the gist of the present invention as claimed in the claims, and such modifications should not be understood individually from the technical ideas and perspectives of the present invention. [Explanation of symbols]

[0069] 10: Battery module 100: Heat dissipation material 130: Heat insulating material 150: Heat dissipation material 151: 1st heat dispersion section 152:Second heat dispersion section 156: First depression 157: Second depression 158: First Bay 159: Second Bay 170: Cooling material 1000: Battery pack 1100: Pack Frame 1100a: Top of pack frame 1100b: Bottom of pack frame 1200: Thermally conductive resin layer 1300: Heat sink

Claims

1. A heat dissipation member located between adjacent battery modules, a heat dissipating member including a first heat dissipating portion and a second heat dissipating portion; a heat insulating member formed along an outer surface of the heat dissipation member; a cooling member formed on the heat dissipation member; A heat dissipation member comprising: A first recess formed in the first heat dissipating portion; A second recess formed in the second heat dissipating portion; Further comprising: The cooling member is a heat dissipation member formed in a first recess of the first heat dissipation portion and a second recess of the second heat dissipation portion.

2. The first heat dispersing portion and the second heat dispersing portion are integrally formed, The heat dissipation member according to claim 1 , wherein the first heat dissipating portion and the second heat dissipating portion are formed such that a portion of the first heat dissipating portion is separated from a portion of the second heat dissipating portion.

3. The first heat dissipating portion and the second heat dissipating portion are each bent and extended, The heat dissipation member according to claim 1 , wherein the first heat dissipating portion and the second heat dissipating portion are bent in opposite directions.

4. A heat dissipation member located between adjacent battery modules, a heat dissipating member including a first heat dissipating portion and a second heat dissipating portion; a heat insulating member formed along an outer surface of the heat dissipation member; a cooling member formed on the heat dissipation member; A heat dissipation member comprising: A first indentation formed in the first heat dissipation portion; A second indentation formed in the second heat dissipation portion; Further comprising: The first indentation and the second indentation are formed so as to be in contact with each other.

5. A plurality of battery modules; a heat dissipation member located between adjacent battery modules among the plurality of battery modules; Including, The heat dissipation member is a heat dissipating member including a first heat dissipating portion and a second heat dissipating portion; a heat insulating member formed along an outer surface of the heat dissipation member; a cooling member formed on the heat dissipation member; A battery pack comprising: A first recess formed in the first heat dissipating portion; A second recess formed in the second heat dissipating portion; Further comprising: The cooling member is formed in a first recess of the first heat dissipating portion and a second recess of the second heat dissipating portion.

6. The battery pack according to claim 5 , wherein the heat insulating member is formed between the heat dissipating member and the battery module.

7. The battery pack according to claim 5 , wherein the heat insulating member is formed so as to be in contact with the battery module.

8. The first heat dispersing portion and the second heat dispersing portion are integrally formed, The battery pack according to claim 5 , wherein the first heat dispersing portion and the second heat dispersing portion are spaced apart from each other.

9. The first heat dissipating portion and the second heat dissipating portion are each bent and extended, The battery pack according to claim 5 , wherein the first heat dispersing portion and the second heat dispersing portion are folded in opposite directions.

10. A plurality of battery modules; a heat dissipation member located between adjacent battery modules among the plurality of battery modules; Including, The heat dissipation member is a heat dissipating member including a first heat dissipating portion and a second heat dissipating portion; a heat insulating member formed along an outer surface of the heat dissipation member; a cooling member formed on the heat dissipation member; A battery pack comprising: A first indentation formed in the first heat dissipation portion; A second indentation formed in the second heat dissipation portion; Further comprising: The first indentation and the second indentation are formed so as to be in contact with each other.

11. The battery pack further includes a pack frame that houses the plurality of battery modules, The battery pack according to claim 5 , wherein the cooling member is in contact with an upper portion of the pack frame.

12. The battery pack according to claim 11 , wherein the cooling member is in contact with an upper inner surface of the pack frame.

13. The battery pack according to claim 11 , further comprising a thermally conductive resin layer formed between the lower portion of the battery module and the bottom of the pack frame.

14. The battery pack according to claim 13 , further comprising a heat sink formed between the thermally conductive resin layer and a bottom of the pack frame.

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