KR20190009634A - Apparatus for cooling of battery and battery pack including the same - Google Patents

Abstract

A battery cooling apparatus according to the present invention comprises: a cooling unit configured to contact a battery and cool the battery using a phase change from a liquid refrigerant to a gas refrigerant; and a condensing unit configured to introduce the phase-changed gaseous refrigerant in the cooling unit, to condense the introduced gaseous refrigerant into the liquid refrigerant to be supplied to the cooling unit. The refrigerant can be circulated between the condensing unit and the cooling unit without a separate power unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery cooling apparatus and a battery pack including the battery cooling apparatus.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery cooling device and a battery pack including the battery cooling device, and more particularly, to a battery cooling device that uses a phase change between a gaseous coolant and a liquid coolant to cool a battery and a battery pack including the same.

BACKGROUND ART [0002] In recent years, rechargeable secondary batteries have been widely used as energy sources for wireless mobile devices. Also, the secondary battery is attracting attention as a power source for an electric vehicle (EV) and a hybrid electric vehicle (HEV), which are suggested as solutions for air pollution of existing gasoline vehicles and diesel vehicles using fossil fuels .

2. Description of the Related Art [0002] Medium- and large-sized devices such as automobiles use a battery module in which a plurality of battery cells are electrically connected to each other and a middle- or large-sized battery pack including the unit module. Since the battery module and the battery pack are preferably manufactured in a small size and a weight, a prismatic battery, a pouch-shaped battery, or the like, which can be stacked at a high density and have a small weight to capacity ratio, are mainly used as unit cells of a battery module. Particularly, a pouch-shaped battery using an aluminum laminate sheet or the like as an exterior member has attracted much attention due to its advantages such as small weight, low manufacturing cost, and easy shape deformation.

The battery cells constituting the battery module generate a large amount of heat during the charging and discharging process. Particularly, a laminate sheet of a pouch-type battery widely used for a high-output large-capacity battery module and a battery pack is coated with a polymer material having a low thermal conductivity, so that it is difficult to effectively cool the temperature of the entire battery cell. If the heat of the battery module generated during the charging and discharging process can not be effectively removed, heat accumulation may occur, thereby accelerating the deterioration of the battery module and possibly causing ignition or explosion. Therefore, a battery module having a high output capacity and a battery pack having the battery module packaged therein are required to have a cooling device or a cooling member for cooling the battery cells built therein.

Generally, a battery module is manufactured by stacking a plurality of battery cells at a high density, and adjacent battery cells are stacked at a predetermined interval so as to remove heat generated during charging and discharging. For example, the battery cells themselves may be sequentially stacked while being spaced apart from each other by a predetermined space, or in the case of a battery cell having a low mechanical rigidity, one or a combination of two or more batteries may be built in a cartridge or the like. A battery module can be configured. At this time, the conventional cooling apparatus includes a flow path of a coolant (for example, coolant) formed between the battery cells or the battery modules so as to effectively remove accumulated heat between the stacked battery cells or the battery modules.

The conventional cooling device has a problem in that the entire size of the battery module is increased because a plurality of refrigerant channels must be secured corresponding to a plurality of battery cells. In addition, in the conventional cooling apparatus, as many battery cells are stacked, a large number of components (for example, tanks, valves, pumps, coolers, etc.) are added to increase the volume of the battery module, And the manufacturing process becomes complicated, resulting in a disadvantage that the manufacturing cost is greatly increased. In addition, since the conventional cooling apparatus needs to use a structure in which the refrigerant flowing in the cooling channel flows into the inlet and then exits to the outlet, there is a problem that the side closer to the inlet side is cooled more and the side closer to the outlet side is less cooled. That is, there is a problem that the cooling water efficiency increases as the temperature of the cooling water increases as it is far from the inlet and closer to the outlet. This causes a temperature deviation of the secondary battery, and a temperature deviation of the secondary battery leads to a performance variation of the secondary battery, leading to a deterioration in performance of the entire battery system.

The present invention is characterized in that an absorption member which absorbs liquid refrigerant supplied from a condenser at one end and moves to the other end is provided in a cooling section and a battery can be cooled by using a phase change of liquid refrigerant generated in an inner space of the cooling section An object of the present invention is to provide a battery cooling device and a battery pack including the same.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description and more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to an aspect of the present invention, there is provided a battery cooling apparatus including a cooling unit contacting a battery, configured to cool the battery using a phase change from a liquid refrigerant to a gaseous refrigerant, And a condensing portion configured to condense the introduced gaseous refrigerant into the liquid refrigerant and supply the gaseous refrigerant to the cooling portion.

Preferably, the cooling unit may include an absorbing member disposed in the inner space, the absorbing member being formed in a porous form and configured to absorb the liquid-phase refrigerant supplied from the condensing unit at one end and move the other end in the other end direction.

Preferably, the absorptive member is formed with a protrusion protruding outwardly at one end of the liquid refrigerant absorbed therein.

Preferably, the condenser includes a gaseous inflow port into which the gaseous refrigerant is introduced, a liquefied flow path in which the introduced gaseous refrigerant is condensed with the liquid refrigerant, the gaseous refrigerant and the liquid refrigerant flow, and the condensed liquid refrigerant is discharged And a liquid discharge port positioned below the vapor inlet.

Preferably, the liquefaction flow path may be configured to have a portion inclined so as to become higher toward the vapor inlet port from the liquid outlet port.

Preferably, at least a part of the liquefaction passage may be disposed at a height equal to or higher than the height of the liquid outlet.

Preferably, the battery cooling device further includes a liquid-phase flow path portion having one end connected to the condensing portion and the other end connected to the cooling portion, the liquid-phase flow path portion configured to allow the liquid- And the other end is connected to the condensing portion so that the gaseous refrigerant discharged from the cooling portion flows toward the condensing portion.

The cooling unit may further include a liquid inlet connected to the internal space to receive the liquid refrigerant, and a gas outlet communicating with the internal space to discharge the gaseous refrigerant.

Preferably, the absorbing member may be disposed in a space between the liquid inlet and the gas outlet in the internal space of the cooling section.

Preferably, the liquid inlet may be formed in contact with a lower surface of the inner space of the cooling part.

Preferably, the gas outlet may be formed in contact with the upper surface of the inner space of the cooling portion.

Preferably, the battery cooling device further comprises a heat end member disposed between the condensing portion and the battery, the heat blocking member configured to block or reduce heat exchanged between the condensing portion and the battery.

The battery pack according to the present invention may include the battery cooling apparatus.

According to the present invention, an absorption member for absorbing the liquid-phase refrigerant supplied from the condenser at one end and moving to the other end is provided inside the cooling section, and the battery is cooled using the phase change of the liquid-phase refrigerant generated in the internal space of the cooling section , The refrigerant can be circulated between the condensing section and the cooling section without any separate power device.

1 is a perspective view of a battery cooling apparatus and a battery according to an embodiment of the present invention.
2 is a side view of a battery cooling device and a battery according to an embodiment of the present invention.
3 is a sectional view taken along the line A-A 'in Fig.
4 is a cross-sectional view taken along the line B-B 'in Fig.
5 is a cross-sectional view of a cooling unit of a battery cooling apparatus according to another embodiment of the present invention.
6 is a cross-sectional view of a cooling unit of a battery cooling apparatus according to another embodiment of the present invention.
7 is a view illustrating the inside of a condensing portion of a battery cooling apparatus according to an embodiment of the present invention.
8 is a perspective view of a battery cooling apparatus and a battery according to another embodiment of the present invention.
9 is a graph of position-specific temperature over time when the battery is cooled with natural convection.
FIG. 10 is a graph illustrating a temperature-dependent temperature according to time when a battery cooling apparatus according to an embodiment of the present invention is filled with acetone as a refrigerant.

The above and other objects, features, and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings, which are not intended to limit the scope of the present invention. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to denote the same or similar elements.

FIG. 1 is a perspective view of a battery cooling apparatus and a battery according to an embodiment of the present invention. FIG. 2 is a side view of a battery cooling apparatus and a battery according to an embodiment of the present invention. And FIG. 4 is a cross-sectional view taken along the line B-B 'in FIG.

Referring to FIGS. 1 to 4, a battery cooling apparatus according to an embodiment of the present invention may include a cooling unit 100 and a condensing unit 200.

The cooling unit 100 may be configured to contact the battery 10 and cool the battery 10 using a phase change from liquid refrigerant to gaseous refrigerant. More specifically, the cooling unit 100 may be disposed below the battery 10 such that the upper surface thereof is in surface contact with the lower surface of the battery 10.

Here, the battery 10 may include a cell stack in which a plurality of battery cells 11 are stacked, and a housing 112 in which a plurality of battery cells 11 are accommodated.

The type of the battery cell 11 is not particularly limited, and various secondary batteries may be employed in the present invention. For example, the battery cell 11 may be composed of a lithium ion battery, a lithium polymer battery, a nickel cadmium battery, a nickel hydride battery, a nickel zinc battery, or the like. In particular, the battery cell 11 may be a lithium secondary battery.

On the other hand, the liquid refrigerant described above may mean a refrigerant in a liquid state, and the above-mentioned gaseous refrigerant may mean a refrigerant in a gaseous state. Here, the conventional refrigerant used for the cooling device can be used without restriction, but in the present invention, acetone can be used as the refrigerant.

2, the cooling unit 100 does not locally cool the lower surface of the housing 12 by surface contact with the entire lower surface of the housing 12, so that the entire lower surface of the housing 12 It can be uniformly cooled.

The cooling unit 100 may cool the plurality of battery cells 11 accommodated in the housing 12 by cooling the lower surface of the housing 12. [

The cooling unit 100 may include a heat sink 110, a liquid inlet 120, a gas outlet 130, and an absorbent member 140.

The heat sink 110 can receive the liquid refrigerant, the gaseous refrigerant, and the absorption member 140 in the inner space. 3, the internal space of the heat sink 110 may include a first internal space AR1 through which the liquid refrigerant flows and a second internal space AR2 through which the gaseous refrigerant is discharged.

The heat sink 110 may be made of a metal or a non-metal material. For example, a metal such as copper, aluminum, or titanium. Non-ferrous metal materials such as graphite.

4, the heat sink 110 may be formed so that the liquid inlet 120 may be formed at the side thereof so that the liquid refrigerant supplied from the condenser 200 flows into the first internal space AR1 have. The heat sink 110 is formed so that the vapor phase outlet 130 is formed in the side surface of the heat sink 110 in order to discharge the vaporized gaseous refrigerant from the second internal space AR2 to the outside of the heat sink 110 and to be supplied to the condenser 200. [ .

That is, in the cooling unit 100, the liquid inlet 120 formed on the side surface of the heat sink 110 communicates with the first internal space AR1 to allow the liquid phase refrigerant to flow into the inside, And the gaseous refrigerant can be discharged to the outside by communicating with the internal space AR2.

At this time, the liquid inlet 120 is connected to the lower portion of the liquid flow path portion 300 connected to the condenser 200, so that the liquid coolant supplied from the condenser 200 can be introduced.

The gas-phase outlet 130 is connected to a lower portion of the vapor-phase flow passage 400 connected to the condenser 200, so that the vapor-phase refrigerant can be discharged to the condenser 200.

The absorbent member 140 may be disposed in the inner space of the heat sink 110 and may be formed in a porous form to absorb the liquid coolant supplied from the condenser 200 at one end and move the other end .

More specifically, the absorptive member 140 may be formed to fill a space of the internal space of the heat sink 110 except for the first internal space AR1 and the second internal space AR2. That is, the inner space of the heat sink 110 may be divided into the first inner space AR1 and the second inner space AR2 through the absorbing member 140. [

That is, the absorbing member 140 may be disposed in the space between the liquid inlet 120 and the gas outlet 130 in the inner space of the heat sink 110.

The absorptive member 140 is formed in a porous form having numerous voids therein to absorb the liquid refrigerant introduced into the liquid inlet 120 from one end near the first internal space AR1 using the capillary force .

The absorptive member 140 can move the liquid refrigerant absorbed at one end to the other end direction using the capillary force. Here, the other end direction may mean a direction toward the second inner space AR2. That is, the absorbing member 140 can absorb the liquid refrigerant at one end close to the first inner space AR1 and move toward the other end adjacent to the second inner space AR2.

Thus, the absorption member 140 can increase the vaporization amount of the liquid refrigerant by contacting the absorbed liquid refrigerant with the heat source (the inner upper surface of the heat sink 110) for a long time.

The upper surface of the absorptive member 140 may be in contact with the inside of the upper plate of the heat sink 110 in contact with the lower surface of the housing 12 of the battery 10. The heat generated from the plurality of battery cells 11 accommodated in the housing 12 is sequentially transmitted to the lower surface of the housing 12 and the upper plate of the heat sink 110, Lt; / RTI >

At this time, the liquid refrigerant absorbed at one end of the absorptive member 140 may be phase-changed into the gaseous refrigerant by absorbing heat transmitted to the upper surface of the absorptive member 140 while moving toward the other end.

Accordingly, the cooling unit 100 can cool the battery 10 by absorbing heat generated from the plurality of battery cells 11. [

On the other hand, the absorptive member 140 may be formed with a protrusion 141 protruding outward at one end of the liquid-phase refrigerant absorbed therein.

More specifically, the absorptive member 140 may have a plurality of protrusions 141 protruding toward the first internal space AR1 at one end close to the first internal space AR1. The protrusion 141 protrudes from the first end toward the first inner space AR1, so that the contact area with the liquid coolant introduced into the first inner space AR1 can be widened.

As a result, the absorbent member 140 absorbs more liquid refrigerant through the protrusions 141 than when one end is plate-shaped, and phase-changes the absorbed liquid-phase refrigerant to the gaseous refrigerant, The cooling performance of the cooling unit 100 can be improved.

Meanwhile, the protrusion 141 of the absorbing member 140 described above may have a protruding shape so that the two surfaces thereof come into contact with each other at an angle included in a predetermined angular range. These protrusions 141 may be formed continuously along one end of the absorbent member 140.

On the other hand, the absorber 140 may be formed with micro passages uniformly inside to generate a capillary force. When the micro passageway of the absorbing member 140 is uniformly formed, a high capillary force can be generated without increasing the flow resistance. The absorbent member 140 may be made of a natural or synthetic fiber such as natural fibers such as cotton, chemical fibers such as polyamides or inorganic fibers such as carbon fibers or webs or fabrics or non- non-woven fabric material.

5 is a cross-sectional view of a cooling unit of a battery cooling apparatus according to another embodiment of the present invention.

Referring to FIG. 5, the cooling unit 100 of the battery cooling apparatus according to another embodiment of the present invention is disposed at one end of the absorption member 140 with respect to the cooling unit 100 of the battery cooling apparatus according to the embodiment of the present invention Only the shapes of the formed protrusions 141 are different from each other and the shapes and roles of the heat sink 110, the liquid inlet 120, and the vapor outlet 130 may be the same.

5, the cooling unit 100 of the battery cooling apparatus according to another embodiment of the present invention includes a plurality of protrusions 141 'each having a curved surface, 140 may be provided.

That is, according to another embodiment of the present invention, the absorbing member 140 may be formed by projecting a plurality of protrusions 141 'along one end close to the first inner space AR1, and the protrusion 141' The curved surface may be formed to have a curvature included in a predetermined curvature section. The protrusion 141 'protrudes from the first end toward the first inner space AR1, thereby enlarging the contact area with the liquid coolant introduced into the first inner space AR1.

According to another embodiment of the present invention, the protruded surface of the protrusion 141 'of the absorbing member 140 is formed into a curved surface, so that the refrigerant introduced into the first inner space AR1 flows into the protrusion 141' It can flow along the curved surface without being stagnated at the indented portion between the projections 141 '.

Accordingly, the absorption member 140 according to another embodiment of the present invention can uniformly absorb the liquid refrigerant in the entire region of one end.

6 is a cross-sectional view of a cooling unit of a battery cooling apparatus according to another embodiment of the present invention.

Referring to FIG. 6, the cooling unit 100 of the battery cooling apparatus according to another embodiment of the present invention includes the liquid inlet 120 'and the liquid inlet 120' of the cooling unit 100 of the battery cooling apparatus according to the embodiment of the present invention Only the penetration position of the gas discharge port 130 'is different, and the shape and role of the heat sink 110 and the absorption member 140 may be the same.

5, the cooling unit 100 of the battery cooling apparatus according to another embodiment of the present invention is formed such that the liquid inlet 120 'is in contact with the lower surface of the inner space, The outlet 130 'may be formed so as to be in contact with the upper surface of the inner space of the cooling unit 100.

That is, according to another embodiment of the present invention, the liquid inlet 120 'is formed to penetrate through the side surface of the heat sink 110 of the cooling unit 100, and the lower end of the liquid inlet 120' And may be formed to abut the lower surface of the inner space AR1.

Accordingly, the liquid refrigerant introduced into the first internal space AR1 through the liquid inlet 120 'can be accumulated from the lower surface of the first internal space AR1.

In addition, according to another embodiment of the present invention, the gas inlet 220 is formed on the side surface of the heat sink 110 of the cooling unit 100, And may be formed to be in contact with the upper surface of the space AR2.

The gaseous coolant contained in the second internal space AR2 is densely packed in the upper portion of the second internal space AR2 so that the gaseous refrigerant can flow into the gas outlet 130 ' .

Hereinafter, the condenser 200 will be described.

7 is a view illustrating the inside of a condensing portion of a battery cooling apparatus according to an embodiment of the present invention.

1, 2, and 7, the condenser 200 is configured such that the phase-changed gaseous refrigerant is introduced into the cooling unit 100, the gaseous refrigerant is condensed into liquid refrigerant, and supplied to the cooling unit 100 .

More specifically, when the liquid refrigerant supplied to the cooling unit 100 is phase-changed in the cooling unit 100 and then flows into the gaseous refrigerant, the condenser 200 can heat the gaseous refrigerant and condense it into the liquid phase refrigerant have.

That is, the condenser 200 can dissipate the heat of the battery absorbed by the gaseous coolant in the cooling unit 100, thereby liquefying the gaseous coolant into the liquid coolant.

The condenser 200 may include a case 210, a gas inlet 220, a liquid outlet 230, and a liquefier 240.

The case 210 accommodates the liquefied flow path 240 to protect the liquefied flow path 240 from an external impact and dissipates heat generated during the process of liquefying the gaseous phase refrigerant into the liquid refrigerant in the liquefied flow path 240 to the outside can do.

For this, the case 210 may be made of a metal or a non-ferrous material. For example, a metal such as copper, aluminum, or titanium. Non-ferrous metal materials such as graphite.

The gas inlet 220 may be configured to allow the gaseous coolant to flow. More specifically, the gas inlet 220 may be formed through the side of the case 210 and the side of the liquefier 240 so as to communicate with the interior of the liquefier 240. The lower portion of the gaseous inflow port 220 is connected to an upper portion of the gaseous flow path portion 400 connected to the cooling portion 100 so that the gaseous coolant supplied from the cooling portion 100 can be introduced.

The liquid outlet 230 may be configured to discharge the liquid refrigerant condensed in the liquefying passage 240. More specifically, the liquid outlet 230 may be formed through the side of the case 210 and the side of the liquefier 240 so as to communicate with the interior of the liquefier 240. The liquid outlet 230 is connected to an upper portion of the liquid flow path portion 300 connected to the cooling portion 100 so that the liquid phase refrigerant can be discharged to the cooling portion 100.

On the other hand, when the gaseous refrigerant and the liquid phase refrigerant are not restricted in flow, the gaseous phase refrigerant rises to the top and the liquid phase refrigerant goes down.

Accordingly, the liquid outlet 230 may be positioned below the vapor inlet 220. The gas inlet 220 may be formed so as to communicate with the inside of the liquefication channel 240 through the upper side face of the side of the inclined case 210 and the liquid outlet 230 may be inclined And may communicate with the inside of the liquefying passage 240 through the lower side surface of the side surface of the case 210.

As a result, the gaseous refrigerant flows into the upper portion of the liquefying passage 240, and the introduced gaseous refrigerant releases heat to be liquefied into the liquid refrigerant. Then, the liquefied liquid refrigerant flows through the liquefaction passage 240 by gravity and moves to the lower portion of the liquefaction passage 240, so that it can be discharged to the liquid outlet 230.

The liquid refrigerant discharged to the liquid discharge port 230 may be introduced into the cooling unit 100 through the liquid flow path unit 300 connected to the liquid discharge port 230.

Meanwhile, as described above, the gaseous refrigerant flows into the liquefying passage 240 through the gaseous inflow port 220, and the gaseous refrigerant introduced therein can discharge heat and be condensed into the liquid refrigerant.

Accordingly, the gaseous refrigerant flowing through the gaseous phase inlet 220 and the condensed liquid refrigerant can flow together in the liquefying passage 240.

In addition, the liquid flow path 240 can discharge the liquid phase refrigerant to the lower side through the liquid outlet 230.

As shown in FIG. 7, the liquefying channel 240 may be configured to have a portion that is inclined to be higher toward the vapor inlet 220 from the liquid outlet 230.

As a result, the liquid refrigerant flowing inside the liquefying passage 240 is smoothly discharged to the liquid outlet 230, so that the liquid refrigerant used for battery cooling can be smoothly supplied to the cooling unit 100.

At least a part of the liquefier channel 240 may be disposed at a height equal to or higher than the height of the liquid outlet 230. More specifically, at least a part of the liquefier 240 is disposed at a height equal to or higher than a height at which the liquid outlet 230 is located with respect to the lowermost end of the battery cooling apparatus according to the present invention, It is possible to prevent the liquid refrigerant from flowing back to the gaseous phase inlet 220.

7, the liquefier 240 may have a structure in which a plurality of rectangular channels formed in a rectangular shape in cross section are connected to each other. More specifically, the liquefaction flow path 240 can be arranged such that a plurality of rectangular flow paths are arranged at regular intervals from the gas-phase inlet port 220 to the liquid-phase outlet port 230, and another square angle in a direction perpendicular to the direction in which the plurality of square- The flow path can be disposed and connected to both ends of the plurality of rectangular flow paths.

In addition, the liquefying flow path 240 according to another embodiment may have a structure in which a plurality of curved surface flow paths having curved surfaces at the lower end of the cross section are connected. Accordingly, the liquefaction flow path 240 according to another embodiment is formed in a curved shape in the lower part of the cross section, so that the liquefied flow path 240 condensed in the liquefaction flow path 240 does not stay in the liquefied flow path 240, .

The liquid flow path portion 300 is configured such that one end is connected to the condensing portion 200 and the other end is connected to the cooling portion 100 so that the liquid phase refrigerant discharged from the condensing portion 200 flows toward the cooling portion 100 . The gas phase channel portion 400 is configured such that one end thereof is connected to the cooling portion 100 and the other end thereof is connected to the condensing portion 200 so that the gaseous refrigerant discharged from the cooling portion 100 flows toward the condensing portion 200 .

The gas phase channel portion 400 may be longer than the liquid channel portion 300 and may be connected to the gas phase inlet 220 of the condensing portion 200 positioned higher than the liquid phase outlet 230 of the condensation portion 200 .

According to the present invention, the liquid-phase refrigerant condensed in the condenser 200 is supplied to the cooling unit 100 located below through the liquid-phase flow path unit 300 without a separate power unit for moving the refrigerant, The gaseous refrigerant vaporized in the condenser 100 may be supplied to the condenser 200 located above the gaseous refrigerant flow passage 400.

That is, the battery cooling apparatus according to the present invention can improve the energy density of the battery 10 by circulating the refrigerant between the cooling unit 100 and the condensing unit 200 to cool the battery 10 without external power .

8 is a perspective view of a battery cooling apparatus and a battery according to another embodiment of the present invention.

Referring to FIG. 8, a battery cooling apparatus according to another embodiment of the present invention further includes a heat block member 500 compared to the battery cooling apparatus according to an embodiment of the present invention, and includes a cooling unit 100, The portion 200, the liquid flow path portion 300, and the gas flow path portion 400 may have the same shape and function.

The heat shield member 500 of the battery cooling apparatus according to another embodiment of the present invention is disposed between the condenser 200 and the battery 10 and is disposed between the condenser 200 and the battery 10 To block or reduce heat exchanged with the heat exchanger.

According to the present invention, the battery 10 dissipates heat to the surroundings due to the heat generated from the battery cell 11, and the condenser 200 can dissipate heat to the surroundings due to the condensation of the gaseous refrigerant generated therein have.

In other words, both the battery 10 and the condenser 200 generate heat and dissipate heat to the outside.

Accordingly, according to another embodiment of the present invention, the heat shield member 500 is disposed between the battery 10 that radiates heat to the outside and the condenser 200, and the heat radiated from the battery 10, The heat emitted from the heat source 200 can be blocked or reduced.

Accordingly, the heat block member 500 can block the heat radiated from the condenser 200 to the battery 10 to improve the cooling efficiency of the battery cooling device according to the present invention. In addition, The condensation performance of the condenser 200 for condensing the gaseous refrigerant into the liquid coolant can be improved by interrupting the heat radiated to the condenser 200.

For example, the heat shield member 500 may be made of glass, SiO2, polyisoprene, Urenthane, PE (polyester), PET (polyethylene), PBMA (Polybutylmethacrylate), and PMMA (polymethylmethacrylate).

In addition, the heat block member 500 forms an internal space to include an air layer, thereby interrupting or reducing the heat exchanged between the shaft portion and the battery 10.

Hereinafter, an experiment example in which the battery 10 is cooled using the battery cooling apparatus according to an embodiment of the present invention and a comparative example in which the battery is cooled using natural convection are compared.

FIG. 9 is a graph showing a temperature-dependent positional temperature according to time when the battery is cooled by natural convection. FIG. 10 is a graph showing the temperature-dependent temperature according to the time when the acetone is filled with the refrigerant in the battery cooling apparatus according to the embodiment of the present invention. Graph.

9 and 10, experiments and comparative examples were conducted under the experimental conditions of an ambient temperature of 25 ° C and a humidity of 35% RH. The experimental and comparative examples also measured the temperature over time in the upper center (T1), lower center (T2), front center (T3) and side center (T4) of the battery.

As a result of measurement, as shown in Table 1 and FIG. 9, in the comparative example in which the battery was cooled using natural convection, the battery was turned on for 5,000 seconds, then the upper center T1, the lower center T2, And the side center T4, the temperature rapidly increases. When 20000 sec elapses, the temperature converges to a certain temperature.

More specifically, in the case of the comparative example, the temperatures of the upper center T1, the lower center T2, the front center T3, and the side center T4 are 70.32 ° C, 65.04 ° C, 70.54 ° C, and 61.84 ° C . ≪ / RTI >

Temperature measurement position Convergence temperature The upper center (T1) 70.32 DEG C Lower center (T2) 65.04 DEG C Front center (T3) 70.54 DEG C Side center (T4) 61.84 DEG C

On the other hand, as shown in the following Table 2 and FIG. 10, in the experimental example in which the battery was cooled using the battery cooling apparatus according to an embodiment of the present invention, the upper center T1, (T2), the front center (T3), and the side center (T4), the temperature suddenly increases. When 10,000 seconds elapse, the temperature converges to a certain temperature.

More specifically, in the case of the experimental example, the temperatures of the upper center T1, the lower center T2, the front center T3, and the side center T4 after 5500C, 55.99C, 55.19C and 48.08C . ≪ / RTI >

Temperature measurement position Convergence temperature The upper center (T1) 55.05 캜 Lower center (T2) 48.99 ° C Front center (T3) 55.19 DEG C Side center (T4) 48.08 C

Comparing the experimental example with the comparative example, the time for temperature convergence is 10000 sec faster than that of the comparative example in the case of the experimental example, and the temperature of the experimental example is 13.76 캜 minimum and 16.05 캜 maximum Respectively.

That is, when the battery is cooled using the battery cooling apparatus according to an embodiment of the present invention, the battery can be cooled more quickly and cooled to a lower temperature than when the battery is cooled using natural convection.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, But the present invention is not limited thereto.

100: cooling section 200: condensing section
300: liquid phase flow path portion 400: vapor phase flow path portion
500: heat terminal member

Claims (10)

A cooling unit in contact with the battery and configured to cool the battery using a phase change from liquid refrigerant to gaseous refrigerant; And
And a condensing portion configured to introduce the phase-changed gas-phase refrigerant into the cooling portion, to condense the introduced gaseous refrigerant into the liquid-phase refrigerant, and to supply the gas-phase refrigerant to the cooling portion,
The cooling unit
And an absorption member which is disposed in the internal space and is formed in a porous form and configured to absorb the liquid refrigerant supplied from the condenser at one end and move the other end in the other end direction
Battery cooling unit.
The method according to claim 1,
The absorbing member
And a protrusion protruding outwardly is formed at one end of the liquid coolant absorbed by the liquid coolant.
The method according to claim 1,
The condenser
A gas-phase inlet configured to introduce the gaseous refrigerant;
A liquefied flow passage configured to condense the introduced gaseous refrigerant into the liquid refrigerant and to flow the gaseous refrigerant and the liquid refrigerant; And
And a liquid-phase outlet configured to discharge the condensed liquid-phase refrigerant and located below the gas-phase inlet
Battery cooling unit.
The method of claim 3,
The liquefied flow path
And a portion inclined to be higher toward the vapor inlet than the liquid outlet.
The method of claim 3,
At least part of the liquefaction flow path
And is disposed at a height equal to or higher than the height of the liquid discharge port.
The method according to claim 1,
A liquid-phase flow path portion in which one end is connected to the condensing portion and the other end is connected to the cooling portion, and the liquid-phase refrigerant discharged from the condensing portion flows toward the cooling portion;
And a gaseous flow path portion in which one end is connected to the cooling portion and the other end is connected to the condensing portion so that the gaseous refrigerant discharged from the cooling portion flows toward the condensing portion,
The cooling unit
A liquid-phase inlet communicating with the inner space and configured to allow the liquid-phase refrigerant to flow therein, and
And a gas outlet communicating with the inner space to discharge the gaseous refrigerant
Battery cooling unit.
The method according to claim 6,
The absorbing member
Wherein the cooling unit is disposed in a space between the liquid inlet and the gas outlet in an inner space of the cooling unit.
The method according to claim 6,
The liquid inlet
A cooling portion formed to contact a lower surface of the inner space of the cooling portion,
The gas-
And the cooling portion is configured to abut the upper surface of the inner space of the cooling portion.
The method according to claim 1,
A heat shield member disposed between the condenser and the battery, the heat shield member configured to shut off or reduce heat exchanged between the condenser and the battery,
Further comprising a battery cooling device.
The battery cooling apparatus according to any one of claims 1 to 9,
Included battery pack.

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