WO2023128546A1

WO2023128546A1 - Heat dissipation component for cooling battery and battery pack

Info

Publication number: WO2023128546A1
Application number: PCT/KR2022/021369
Authority: WO
Inventors: 공유찬
Original assignee: 공유찬
Priority date: 2021-12-27
Filing date: 2022-12-27
Publication date: 2023-07-06
Also published as: KR20230099282A

Abstract

A heat dissipation component of one embodiment according to the present invention includes: a heat dissipation fin stacking part in which multiple heat dissipation fin plates, each including a heat pipe through-groove, are stacked with an air flow space therebetween; and a heat pipe including a heat dissipation part which is inserted into the heat pipe through-groove and is thermally and conductively in contact with each of the heat dissipation fin plates, and a heat absorption part which extends out of the heat dissipation fin stacking part and is thermally conductively in contact with a heat source, the heat pipe being filled with a working material that moves heat by means of phase changes.

Description

Heat dissipation part for battery cooling and battery pack

The present invention relates to a heat dissipation component for cooling a battery and a battery pack.

A battery pack is, illustratively, composed of a plurality of battery cells, and the battery cells have various shapes such as a cylindrical shape and a pouch shape.

The battery pack generates heat during charging as well as during discharging, and the heat generated from the battery has a significant effect on the performance and lifespan of the battery.

Since the degradation of battery performance caused by heat leads to degradation of the product in which it is mounted, countermeasures against it are very important.

For example, in the case of an electric vehicle, since the mileage or fuel efficiency per battery charge is very important, it is necessary to manage the battery performance so that the power consumption does not drop due to heat generated from the battery.

Therefore, as part of the countermeasures, a heat dissipation component is generally included in the battery pack to remove heat generated from the battery.

On the other hand, the recent development of electric aircraft, including drones, is becoming more and more active. In the case of electric aircraft, in particular, since the demand for light weight is great, the battery pack to be mounted is also required to be lightweight.

An object of the present invention is to provide a heat dissipation component and a battery pack with improved heat dissipation performance.

In addition, an object of the present invention is to provide a heat dissipation component and a battery pack suitable for weight reduction.

A heat dissipation component of one embodiment according to the present invention includes a heat dissipation fin laminated portion in which a plurality of heat dissipation fin plates each including a heat pipe through hole are stacked with air flow spaces; A working material including a heat dissipation part inserted into the heat pipe through-hole and contacting each of the heat dissipation fin plates in a thermal conductive manner, and a heat absorption part extending outside the heat dissipation fin laminated part and in contact with a heat source in a thermal conductive manner, and moving heat through a phase change therein. Including this filled heat pipe.

A heat dissipation component according to another embodiment of the present invention, a first heat dissipation fin stacked portion in which a plurality of first heat dissipation fin plates each including a heat pipe through-hole are stacked while having an air flow space; a second heat dissipation fin laminated portion in which a plurality of second heat dissipation fin plates, each including a heat pipe through hole, are stacked while having an air flow space; The first heat dissipation part inserted into the heat pipe penetration hole of the first heat dissipation fin stacked portion and thermally contacting each of the first heat dissipation fin plates, and the second heat dissipation fin plate inserted into the heat pipe through hole of the second heat dissipation fin laminated portion and thermally conductively in contact with each of the first heat dissipation fin plates A heat pipe including a second heat dissipating part thermally conductively in contact with and a heat absorbing part extending outside the first and second heat dissipating fin stacked parts and thermally conductively in contact with a heat source, the inside of which is filled with a phase change material.

A battery pack according to one embodiment of the present invention includes a battery; and a heat dissipation part for cooling the battery, wherein the heat dissipation part includes: a heat dissipation fin laminated portion in which a plurality of heat dissipation fin plates, each including a heat pipe through hole, are stacked while having an air flow space; and a heat dissipation part inserted into the heat pipe penetration hole and thermally in contact with each of the heat dissipation fin plates, and a heat absorption part extending out of the heat dissipation fin laminated portion and thermally conductively in contact with the battery, the inside of which is filled with a phase change material. includes

In at least one embodiment of the present invention, the heat dissipation component further includes a motor and a fan provided on one side of the heat dissipation fin stacked part.

In addition, in at least one embodiment of the present invention, the plurality of heat dissipation fin plates are laid on planes in first and second directions and stacked in a third direction, and the heat absorbing portion of the heat pipe extends from the heat dissipation fin stacked portion in the third direction. and is bent and extended in the first direction, and the battery is disposed on a side of the heat dissipation fin laminated part among both sides of the heat absorbing part.

In at least one embodiment of the present invention, an inner circumference of the heat pipe penetration hole includes a thermal conductive surface that protrudes in the stacking direction and makes surface contact with the heat dissipating portion of the heat pipe.

In at least one embodiment of the present invention, the heat pipe includes a plurality of channels inside, and the working material is a solid/liquid phase change material filled in some of the plurality of channels and a liquid/liquid phase filled in the remaining channels. gaseous phase change fluids.

A heat dissipation component or a battery pack according to one embodiment of the present invention can obtain improved heat dissipation performance.

In addition, lightweight heat dissipation parts and battery packs bonded to the air-cooled cooling structure can be obtained.

1 shows a heat dissipation component according to one embodiment of the present invention.

FIG. 2 shows a heat pipe included in the heat dissipation component of FIG. 1 .

3 is a top view of a radiating fin plate included in the radiating component of FIG. 1 .

FIG. 4 shows a front view of the heat dissipation fin plate of FIG. 3 .

5 shows a heat dissipation component according to another embodiment of the present invention.

FIG. 6 is a view showing only some components of the battery pack including the heat dissipation component of FIG. 5 .

7 shows a heat dissipation component according to another embodiment of the present invention.

8 shows an example of use of a heat dissipation component according to an embodiment of the present invention.

9 shows another use example of a heat dissipation component according to an embodiment of the present invention.

10 shows a heat dissipation component according to another embodiment of the present invention.

FIG. 11 is a view showing only some parts of the battery pack including the heat dissipation part of FIG. 10 .

12 shows a heat dissipation component according to another embodiment of the present invention.

FIG. 13 is a view showing only some parts of the battery pack including the heat dissipation part of FIG. 12 .

14 shows a state in which the battery packs of FIG. 11 are vertically or horizontally stacked.

FIG. 15 shows a state in which the battery packs of FIG. 13 are vertically or horizontally stacked.

10: turning corners

11: face protrusion

12: heat pipe penetration groove

13: plate top

100, 101, 102, 103, 104: heat radiation parts

110: radiating fin laminated part

111: radiation fin plate

120: heat pipe

121: heat sink

122: heat absorbing unit

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

The suffixes "module" and "unit" used in this specification are only used for nomenclatural distinction between components, and are interpreted as premising that they are physically and chemically separated or separated, or that they can be separated or separated in such a way. should not be

Terms including ordinal numbers such as “first” and “second” may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

The term "and/or" is used to include any combination of a plurality of items that are the subject matter. For example, "A and/or B" means including all three cases such as "A", "B", and "A and B".

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be.

In the description of the embodiments, each layer (film), region, pattern or structure is "on" or "under" the substrate, each layer (film), region, pad or pattern. The substrate formed on includes all those formed directly or through another layer. In addition, the criteria for "upper/upper" or "lower/lower" are, in principle, based on the appearance shown in the drawings for convenience, unless otherwise stated in the properties or specification of each component or between them. It is used only to indicate the relative positional relationship between elements for convenience, and should not be construed as limiting the position of actual components. For example, “above B” only indicates that B is shown above A on the drawing, unless otherwise stated or when A or B must be located above B due to the nature of A or B, and B in actual products, etc. may be located under A, or B and A may be placed sideways.

In addition, since the thickness or size of each layer (film), region, pattern, or structure in the drawing may be modified for clarity and convenience of description, it does not entirely reflect the actual size.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

First, the heat dissipation component 100 according to one embodiment of the present invention will be described with reference to FIGS. 1 to 4 .

The heat dissipation component 100 of this embodiment includes a heat dissipation fin laminated portion 110 and a heat pipe 120.

As shown in FIG. 2 , the heat pipe 120 includes a heat dissipation part 121 and a heat absorption part 122 .

The material of the heat pipe 120 is preferably made of aluminum or an alloy thereof. Illustratively, it may be any one of aluminum 1050 series, aluminum 1070 series, aluminum 1100 series, aluminum 3003 series, or aluminum 6005 series.

As shown in FIG. 2 , the heat pipe 120 has a plurality of internally divided channels.

The plurality of channels may be filled with a solid/liquid phase change material and/or a liquid/vapor phase change fluid as a working fluid.

In this embodiment, odd-numbered channels are filled with liquid/gas phase change fluid, and even-numbered channels are filled with solid/liquid phase-change materials. As such, the use of two types of materials as the working fluid is not limited, and the inside of the heat pipe may be filled with only one of the two materials.

The liquid/gas phase change fluid may include at least one of hydrofluoro-olefin (HFO) or hydrofluoroethers (HFE) series or acetone.

The liquid/gas phase phase-change fluid is phase-changed from the heat absorbing part 122 to the heat radiating part 121, condensed while releasing heat, and returns to the heat absorbing part 122 to remove heat from the heat source.

In addition, a solid/liquid phase change material (PCM) is a material that absorbs heat when changing from a solid to a liquid, stores it inside, and releases the stored heat when changing from a liquid to a solid again. Heat is absorbed by the heat absorbing part 122 and heat is released by the heat radiating part 121 .

A surge current with a very large current can suddenly flow during battery charging, which can cause the battery's heat to rise rapidly. It can act as a buffer against rapidly rising heat.

The heat dissipation part 121 of the heat pipe 120 thermally contacts each heat dissipation fin plate 111 and is inserted into the heat pipe penetration hole 12 of the heat dissipation fin plates 111 . At this time, since it contacts the heat conductive surface 12a of the heat dissipation fin plate 111 and is brazed as described above, the heat conduction effect is excellent.

The heat absorbing portion 122 of the heat pipe 120 is continuously formed with the heat dissipating portion 121 and extends out of the heat dissipating fin laminated portion 110 to come into contact with the heat source in a conductive manner.

The heat absorbing portion 122 extends out of the heat radiating fin laminated portion 110 and then bends in the first direction (x1) to further extend, and thermally conductively contacts a heat source on its upper or lower surface.

In the present specification, 'contacting by heat conduction' means contacting so that heat transfer is conducted in a conductive manner, and includes contacting through other objects or materials other than direct contact.

The heat dissipation fin stacked part 110 is made by stacking the heat dissipation fin plates 111 while having an air flow space in the third direction (x3).

As shown in FIGS. 3 and 4 , the heat dissipation fin plate 111 includes a plate-shaped portion 13 having short edges in a first direction (x1) and long edges in a second direction (x2).

The plate-shaped portion 13 includes the heat pipe penetration groove 12 and includes a plurality of spacing protrusions 10 and 11 protruding in the third direction (x3). Here, reference numeral 10 is a representative code commonly referred to as 10a to 10g, and 11 is a representative code collectively referred to as 11a to 11i.

The heat dissipation fin plate 111 is preferably made of aluminum or an alloy thereof, and the heat pipe through hole 12 and spacer protrusions 10 and 11 are made by punching.

Spacer protrusions 10 and 11 include corner protrusions 10 formed on corners and face protrusions 11 formed on surfaces.

In this embodiment, two

corner protrusions

10b and 10c, 10f and 10g are formed on each of the short side edges, two

corner protrusions

10d and 10e are formed on one side of the long side edges, and one

corner protrusion

10d and 10e is formed on one side of the other long edge. Corner protrusions 10a are formed.

In addition, one surface projection 11a is formed in the center, four

surface projections

11b, 11c, 11d, and 11e are formed on the left side, and four

surface projections

11f, 11g, 11h, and 11i are formed on the right side. ) is formed.

Each of the surface protrusions 11 has a hollow hole, and the inner circumference of the hollow hole protrudes in the third direction (x3). In this embodiment, the face projection 11 is circular, but is not limited thereto.

In the state in which the radiating fin plates 111 are stacked, the spacer protrusions 10 and 11 come into contact with the immediately adjacent radiating fin plates 111, and through this, the radiating fin plates 111 are stacked maintaining a constant distance from each other. In this embodiment, all of the angular projections 10 and 11 protrude in the same height and direction, but are not necessarily limited thereto.

A gap is secured between the radiating fin plates 111 by the spacing protrusions 10 and 11, and an air flow space for air cooling is provided through the gap.

The heat pipe through-hole 12 is formed in the plate-shaped portion 13 and is eccentrically positioned at one of the pair of long side edges.

In addition, the inner circumference of the heat pipe through-hole 12 includes a heat conducting surface 12a protruding in the third direction (x3) and making surface contact with the heat dissipating portion 121 of the heat pipe 120 . Due to surface contact through the heat conductive surface 12a, the heat conduction effect from the heat dissipation portion 121 of the heat pipe 120 to the heat dissipation fin plate 111 may be improved.

The heat pipe 120 is inserted into the heat pipe through-hole 12 and bonded to the heat conductive surfaces 12a of the heat dissipation fin plates 111 through brazing in a state of surface contact. A heat transfer rate between the heat pipe 120 and the heat dissipation fin plate 111 is further improved through brazing bonding.

Here, preferably, the protruding height of the heat conducting surface 12a in the third direction (x3) is the same as that of the spacing protrusions 10 and 11.

Meanwhile, at least one side of the heat dissipation fin plate 111 may include a clad material, and a brazing method is used between the heat dissipation fin plates 111 and/or between the heat dissipation fin plates 111 and the heat pipe 120. It can be bonded to increase the bonding strength and the heat transfer rate between the heat pipe 120 and the heat dissipation fin plate 111.

5 shows a heat dissipation component 101 of an embodiment in which a motor 131 and a fan 132 are additionally included in the heat dissipation component 100 of the above-described embodiment.

As shown, a motor 131 and a fan 132 are disposed on one side of the heat dissipation fin laminate 110 to forcibly blow air to further improve the air cooling effect.

FIG. 6 is an embodiment of a battery pack including the heat dissipating component 100 of FIG. 5 , and has a structure in which a battery B is thermally conductively in contact with an upper surface of a heat absorbing portion 122 of a heat pipe 120 .

7 shows a heat dissipation component 102 of another embodiment of the present invention.

The heat dissipation component 102 of this embodiment has the same heat dissipation fin laminated portion 110' and heat pipe 120' as those of the above-described embodiment. However, in this embodiment, the motor 131' and the fan 132' have a structure in which they are directly mounted on one side of the heat dissipation fin stacked part 110' through four screws 133'.

Meanwhile, FIGS. 8 and 9 show examples of using the heat dissipating component 100 of FIG. 1 and the heat dissipating component 102 of FIG. 7 together.

As shown in FIG. 8, the heat dissipation part 100 of FIG. 1 and the heat dissipation part 102 of FIG. 7 are disposed facing each other, and the battery ( B) can be placed.

FIG. 9 is an example in which the left heat dissipation component 100 is vertically inverted and disposed in the state of FIG. 8 , and the battery B may be disposed similarly to the case shown in FIG. 13 .

Meanwhile, FIG. 10 shows a heat dissipation component 103 according to another embodiment of the present invention.

As shown, the heat dissipation component 103 of this embodiment includes a first heat dissipation fin laminated portion 110a″, a second heat dissipated fin laminated portion 110b″, and a heat pipe 120″.

As shown, the first heat dissipation fin stacked portion 110a″ is disposed on the right side and has the same structure as the heat dissipation fin stacked portion 110 of the above-described embodiment.

The second heat dissipation fin stacked portion 110b'' is disposed on the left side and has the same structure as the heat dissipation fin stacked portion 110 of the above-described embodiment.

The heat pipe 120'' of this embodiment is filled with a working fluid and integrally formed as one, and includes the first heat dissipating part 121a'', the second heat dissipating part 121b'', and the heat absorbing part 122''. includes

The first heat dissipation part 121a″ is inserted into the heat pipe through-hole of the first heat dissipation fin stacked part 110a″ and thermally conductively contacts each of the first heat dissipation fin plates 111a″, and the second heat dissipation part ( 121) is inserted into the heat pipe penetration hole of the second heat dissipation fin laminated portion 110b″ and thermally conductively contacts each second heat dissipation fin plate 111b″.

Further, the heat absorbing portion 122'' is formed between the first heat dissipating portion 121a'' and the second heat dissipating portion 121b'', and the first and second heat dissipating fin stacked portions 110a'' and 110b'' It extends outward and bends to contact the heat source in a thermally conductive manner.

In addition, in this embodiment, the first motor 131a″ and the first fan 132a″ are disposed on one side of the first heat dissipation fin stacked portion 110a″, and the second motor 131b″ and the second A fan 132b″ is disposed on one side of the second heat dissipation fin stacked portion 110b″.

In this embodiment, two motors 131a″ and 131b″ and two fans 132a″ and 132b″ are included, but are not limited thereto, and only one of them may be included.

FIG. 11 shows a partial view of a battery pack in which the battery B is disposed on the upper surface of the heat absorbing portion 122 ″ of the heat dissipating part 103 of FIG. 10 .

12 shows a heat dissipation component 104 of another embodiment, and in this embodiment, unlike the heat dissipation component 103 of FIG. ) and the second fan 132b''' are vertically inverted.

FIG. 13 is an embodiment of a battery pack to which the heat dissipation component 104 of FIG. 12 is applied. As shown, in this embodiment, the battery B is disposed on the upper and lower surfaces of the heat absorbing part 122''', respectively.

The battery packs of the embodiments of the present invention may be vertically or horizontally stacked according to the layout of the space in which they are installed.

Illustratively, the battery packs of FIG. 11 may be vertically or horizontally stacked as shown in FIG. 14 .

Also, illustratively, the battery packs of FIG. 13 may be vertically or horizontally stacked as shown in FIG. 15 .

Claims

a heat dissipation fin laminated portion in which a plurality of heat dissipation fin plates each including a heat pipe through-hole are stacked with an air flow space;

A working material including a heat dissipation part inserted into the heat pipe through-hole and contacting each of the heat dissipation fin plates in a thermal conductive manner, and a heat absorption part extending outside the heat dissipation fin laminated part and in contact with a heat source in a thermal conductive manner, and moving heat through a phase change therein. These filled heatpipes

A heat dissipation component comprising a.
battery; and

A heat dissipation component that cools the battery

including,

The heat dissipation component is:

a heat dissipation fin laminated portion in which a plurality of heat dissipation fin plates, each including a heat pipe through hole, are stacked with an air flow space;

A heat dissipation part inserted into the heat pipe penetration hole and contacting each of the heat dissipation fin plates in a thermal conduction manner, and a heat absorption part extending out of the heat dissipation fin stacked part and contacting the battery in a thermal conduction manner, and moving heat through a phase change therein. material filled heat pipe

A battery pack comprising a.
According to claim 2,

The heat dissipation component further includes a motor and a fan provided on one side of the heat dissipation fin stacked portion.

battery pack.
According to claim 2,

The plurality of heat dissipation fin plates are laid on planes in first and second directions and stacked in a third direction;

The heat absorbing portion of the heat pipe extends from the radiating fin laminated portion in the third direction and is bent and extended in the first direction;

The battery is disposed on the side of the heat dissipation fin stacking part among both sides of the heat absorbing part.

battery pack.
According to claim 2,

The inner circumference of the heat pipe through-hole includes a thermal conductive surface that protrudes in the stacking direction and makes surface contact with the heat dissipating portion of the heat pipe.

battery pack.
According to claim 2,

Each of the heat dissipation fin plates includes a plurality of spacing protrusions that protrude from corners and/or surfaces in the stacking direction to make contact with other immediately adjacent heat dissipation fin plates to secure the air flow space.

battery pack.
a first heat dissipation fin laminated portion in which a plurality of first heat dissipation fin plates each having a heat pipe through hole are stacked with air flow spaces;

a second heat dissipation fin laminated portion in which a plurality of second heat dissipation fin plates, each including a heat pipe through hole, are stacked while having an air flow space;

The first heat dissipation part inserted into the heat pipe penetration hole of the first heat dissipation fin stacked portion and thermally conductively in contact with each of the first heat dissipation fin plates, and the second heat dissipation fin plate inserted into the heat pipe through hole of the second heat dissipation fin laminated portion A second heat dissipation part in thermally conductive contact with the second heat dissipation part, and a heat absorption part extending outside the first and second heat dissipation fin stacked parts and in contact with the heat source in a thermal conductive manner, the inside of which is filled with a working material that moves heat through a phase change pipe

A heat dissipation component comprising a.
The method of any one of claims 1 and 7,

The heat pipe includes a plurality of channels inside,

The working material includes a solid / liquid phase change material filled in some of the plurality of channels and a liquid / gaseous phase change fluid filled in the remaining channels.

heat dissipation component.