KR20210130658A - Battery pack and device including the same - Google Patents

Abstract

A battery pack according to an embodiment of the present invention includes: a plurality of battery modules including battery cells; a pack frame for accommodating the battery modules; a pack refrigerant pipe assembly connected to the battery modules; and a pack refrigerant pipe housing for accommodating the pack refrigerant pipe assembly. The present invention improves the cooling performance of the battery pack.

Description

A battery pack and a device including the same

The present invention relates to a battery pack and a device including the same, and more particularly, to a battery pack having improved cooling performance and a device including the same.

In modern society, as portable devices such as mobile phones, laptops, camcorders, and digital cameras are used in daily life, the development of technologies related to mobile devices as described above is being actively developed. In addition, a rechargeable battery capable of charging and discharging is a method to solve air pollution such as conventional gasoline vehicles using fossil fuels, and electric vehicles (EVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles ( P-HEV) is being used as a power source, and the need for the development of secondary batteries is increasing.

Currently commercialized secondary batteries include nickel cadmium batteries, nickel hydride batteries, nickel zinc batteries, and lithium secondary batteries. Among them, lithium secondary batteries have almost no memory effect compared to nickel-based secondary batteries, so charging and discharging are free and easy. , the self-discharge rate is very low and the energy density is high.

Such a lithium secondary battery mainly uses a lithium-based oxide and a carbon material as a positive electrode active material and a negative electrode active material, respectively. A lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate to which the positive electrode active material and the negative electrode active material are respectively applied with a separator interposed therebetween, and a battery case in which the electrode assembly is sealed and accommodated together with an electrolyte.

In general, a lithium secondary battery may be classified into a can-type secondary battery in which an electrode assembly is embedded in a metal can and a pouch-type secondary battery in which an electrode assembly is embedded in a pouch of an aluminum laminate sheet according to the shape of the exterior material.

In the case of a secondary battery used in small devices, 2-3 battery cells are disposed, but in the case of a secondary battery used in a medium or large device such as an automobile, a battery module in which a plurality of battery cells are electrically connected this is used In such a battery module, a plurality of battery cells are connected in series or parallel to each other to form a battery cell stack, thereby improving capacity and output. In addition, one or more battery modules may be mounted together with various control and protection systems such as a battery management system (BMS) and a cooling system to form a battery pack.

In the case of the secondary battery, when the temperature is higher than an appropriate temperature, the performance of the secondary battery may be deteriorated, and in severe cases, there is a risk of explosion or ignition. In particular, a plurality of secondary batteries, that is, a battery module or battery pack having battery cells, may have a higher temperature more rapidly and severely because heat emitted from the plurality of battery cells is added up in a narrow space. In other words, in the case of a battery module in which a plurality of battery cells are stacked and a battery pack equipped with such a battery module, high output can be obtained, but it is not easy to remove heat generated from the battery cells during charging and discharging. If the heat dissipation of the battery cell is not performed properly, the deterioration of the battery cell is accelerated, the lifespan is shortened, and the possibility of explosion or ignition increases.

Moreover, in the case of a battery module included in a vehicle battery pack, it may be frequently exposed to direct sunlight and may be subjected to high temperature conditions such as summer or desert areas.

Therefore, when configuring a battery module or a battery pack, it can be said that it is very important to secure a stable and effective cooling performance.

1 is a perspective view of a conventional battery module, and FIG. 2 is a cross-sectional view taken along the cutting line A-A' of FIG. 1 . In particular, FIG. 2 further illustrates a heat transfer member and a heat sink positioned under the battery module.

1 and 2 , in the conventional battery module 10 , a plurality of battery cells 11 are stacked to form a battery cell stack 20 , and the battery cell stack 20 includes a module frame 30 . ) is stored in

As described above, since it includes a plurality of battery cells 11 , the battery module 10 generates a large amount of heat during charging and discharging. As a cooling means, the battery module 10 may include a thermally conductive resin layer 40 positioned between the battery cell stack 20 and the bottom 31 of the module frame 30 . In addition, when the battery module 10 is mounted on the pack frame to form a battery pack, the heat transfer member 50 and the heat sink 60 may be sequentially positioned under the battery module 10 . The heat transfer member 50 may be a heat dissipation pad, and the heat sink 60 may have a refrigerant passage formed therein.

Heat generated from the battery cell 11 passes through the thermal conductive resin layer 40 , the bottom part 31 of the module frame 30 , the heat transfer member 50 , and the heat sink 60 in order of the battery module 10 . transmitted to the outside.

However, in the case of the conventional battery module 10 , the heat transfer path is complicated as described above, and it is difficult to effectively transfer the heat generated from the battery cell 11 . The module frame 30 itself may reduce the heat conduction characteristics, and a minute such as an air gap that may be formed between each of the module frame 30 , the heat transfer member 50 and the heat sink 60 . The air layer may also be a factor that deteriorates the heat conduction characteristics.

On the other hand, a flow path of a refrigerant is formed inside the heat sink 60. This refrigerant is usually cooling water, and a fluid indirect cooling structure in which the cooling water flows inside the battery pack to lower the temperature may be applied.

However, there may be a situation in which the coolant leaks due to an assembly defect or an accident during operation, and the leaked coolant may penetrate into the battery pack and cause a fire or explosion.

As other demands such as miniaturization and capacity increase are continuing for battery packs, it is practically necessary to develop a battery pack that can satisfy these various requirements while improving cooling performance and minimizing damage caused by coolant leakage. can do.

An object of the present invention is to provide a battery pack having improved cooling performance and a device including the same.

However, the problems to be solved by the embodiments of the present invention are not limited to the above problems and may be variously expanded within the scope of the technical idea included in the present invention.

A battery pack according to an embodiment of the present invention includes a plurality of battery modules including battery cells; a pack frame accommodating the battery modules; a pack refrigerant pipe assembly connected to the battery module; and a pack refrigerant tube housing for accommodating the pack refrigerant tube assembly.

The battery pack may include a housing cover that covers an upper portion of the pack refrigerant tube housing; and a first gasket sealing between the pack refrigerant tube housing and the housing cover.

An opening may be formed in a bottom surface of the pack refrigerant tube housing, and a second gasket may be coupled to the portion in which the opening is formed.

The battery module may include: a battery cell stack in which the battery cells are stacked; a module frame for accommodating the battery cell stack; a heat sink positioned below the bottom of the module frame; and cooling ports for supplying refrigerant to the heat sink or discharging the refrigerant from the heat sink. The module frame may include a module frame protrusion protruding from the bottom of the module frame, and the second gasket may be positioned between the module frame protrusion and the pack refrigerant tube housing.

A bottom portion of the module frame may constitute an upper plate of the heat sink, and a bottom portion of the module frame may be in contact with the refrigerant.

The cooling port, in the upper surface of the protrusion of the module frame, through the second gasket and the opening, may protrude into the inside of the pack refrigerant tube housing.

The pack refrigerant pipe assembly may include a pack refrigerant pipe and a connection port connecting the pack refrigerant pipe and the cooling port. The connection port may be coupled to the cooling port through the opening and the second gasket.

The cooling port may be inserted and coupled to a lower side of the connection port, and a lower end of the connection port may be in contact with an upper surface of the module frame protrusion.

A sealing member may be positioned between the cooling port and the connection port.

A coupling hole may be formed in a bottom surface of the pack coolant tube housing, and a coupling member may be inserted into the coupling hole to couple the pack coolant tube housing and the pack frame.

The battery pack may further include a drain valve formed on the bottom surface of the pack refrigerant tube housing and having a structure capable of opening and closing.

A first outlet may be formed in the pack refrigerant tube housing, a second outlet may be formed in the pack frame, and the drain valve may connect the first outlet and the second outlet.

The drain valve may include a spacer having a connecting pipe connecting the first outlet and the second outlet, and a drain plug inserted into the connecting pipe.

The connector may include a first connector in the direction of the first outlet and a second connector in the direction of the second outlet. The first connector may have a smaller inner diameter than the second connector. The drain plug may include an insertion part having a diameter corresponding to an inner diameter of the first connector pipe and a fixing part having a diameter corresponding to an inner diameter of the second connector pipe.

The drain valve may further include a sealing ring positioned between the spacer and the drain plug.

The battery pack may further include a leak detection sensor accommodated in the pack refrigerant tube housing.

The battery modules may be arranged in a grid, and the pack refrigerant tube assembly and the pack refrigerant tube housing may be arranged between the battery modules.

The pack refrigerant pipe assembly may include a pack refrigerant pipe, and the pack refrigerant pipe may include a main pack refrigerant pipe and a sub-pack refrigerant pipe connecting the main pack refrigerant pipe and the battery modules. The sub-pack refrigerant pipe may extend from one end of the main pack refrigerant pipe in both directions perpendicular to the longitudinal direction of the main pack refrigerant pipe. The pack refrigerant tube housing may be connected along extended portions of the main pack refrigerant tube and the sub-pack refrigerant tube.

The battery module may include a heat sink; It may include a refrigerant injection port for supplying a refrigerant to the heat sink and a refrigerant discharge port for discharging the refrigerant from the heat sink. The refrigerant injection port formed in any one of the neighboring battery modules and the refrigerant discharge port formed in the other battery module may face each other.

The battery modules may include a first battery module and a second battery module arranged in two rows in a direction in which the battery cells are stacked and facing each other in a direction perpendicular to the direction in which the battery cells are stacked. The refrigerant injection port and the refrigerant discharge port may be disposed between the first battery module and the second battery module.

According to embodiments of the present invention, cooling performance may be improved through the integrated battery module structure of the module frame and the heat sink. In this case, cooling ports are formed in each of the battery modules in the battery pack, so that uniform cooling performance in each battery module can be exhibited.

In addition, by accommodating the pack refrigerant pipe that transmits the refrigerant to the cooling port in the housing, it is possible to prevent leakage of the refrigerant from leading to a fire or explosion of the battery pack.

In addition, it is possible to minimize the number of battery modules in the battery pack by maximizing the number of battery cells in the battery module, thereby reducing the number of cooling ports, thereby reducing the risk of refrigerant leakage in the battery pack.

Effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of a conventional battery module.
FIG. 2 is a cross-sectional view taken along line A-A' of FIG. 1 .
3 is a perspective view illustrating a battery module according to an embodiment of the present invention.
4 is an exploded perspective view of the battery module of FIG. 3 .
5 is a perspective view of the battery module of FIG. 3 as viewed from the bottom of the battery module along the z-axis direction.
6 is an exploded perspective view illustrating a battery pack according to an embodiment of the present invention.
7 is an exploded perspective view illustrating the pack refrigerant tube assembly and the pack refrigerant tube housing included in the battery pack of FIG. 6 .
8 is a perspective view illustrating a part of each of the battery module, the pack refrigerant tube, the pack refrigerant tube housing, and the second gasket according to an embodiment of the present invention.
9 is a partial view showing a connection port and a cooling port according to the present embodiment.
10 is a plan view of the battery pack viewed from the top down so that the bottom surface of the pack refrigerant tube housing according to an embodiment of the present invention is visible.
11 is a cross-sectional view illustrating a portion cut along the cutting line B-B' of FIG. 6 .
12 is a perspective view illustrating a battery pack according to another embodiment of the present invention.
13 is a partial perspective view illustrating a connection relationship between the battery modules included in the battery pack of FIG. 12 and the pack refrigerant tube assembly.
14 is an exploded perspective view illustrating the pack refrigerant tube assembly and the pack refrigerant tube housing included in the battery pack of FIG. 12 .
15 is a cross-sectional view showing a portion taken along the cutting line C-C' of FIG. 12 .
16 (a) and (b) are partial views of the area indicated by “D” in FIG. 15 viewed from different angles.
17 and 18 are plan views showing a battery pack according to an embodiment of the present invention, respectively.

Hereinafter, with reference to the accompanying drawings, various embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily implement them. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly explain the present invention, parts irrelevant to the description are omitted, and the same reference numerals are given to the same or similar elements throughout the specification.

In addition, since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the present invention is not necessarily limited to the illustrated bar. In order to clearly express various layers and regions in the drawings, the thicknesses are enlarged. And in the drawings, for convenience of description, the thickness of some layers and regions are exaggerated.

Also, when a part of a layer, film, region, plate, etc. is said to be “on” or “on” another part, it includes not only cases where it is “directly on” another part, but also cases where there is another part in between. . Conversely, when we say that a part is "just above" another part, we mean that there is no other part in the middle. In addition, to be "on" or "on" the reference part means to be located above or below the reference part, and to necessarily mean to be located "on" or "on" in the direction opposite to gravity no.

In addition, throughout the specification, when a part "includes" a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

In addition, throughout the specification, when referring to "planar", it means when the target part is viewed from above, and "in cross-section" means when viewed from the side when a cross-section of the target part is vertically cut.

Hereinafter, a battery module according to the present embodiment will be described with reference to FIGS. 3 to 5 .

3 is a perspective view illustrating a battery module according to an embodiment of the present invention. 4 is an exploded perspective view of the battery module of FIG. 3 . 5 is a perspective view of the battery module of FIG. 3 viewed from the bottom of the battery module along the z-axis direction.

3 to 5 , the battery module 100 according to an embodiment of the present invention includes a battery cell stack 120 in which battery cells 110 are stacked, and a battery cell stack 120 accommodating the It may include the module frame 200 and the heat sink 300 positioned below the bottom 210a of the module frame 200 . The bottom part 210a of the module frame 200 constitutes an upper plate of the heat sink 300 , and the recessed part 340 of the heat sink 300 and the bottom part 210a of the module frame 200 are the refrigerant passages. to form

First, the battery cell 110 may be a pouch-type battery cell. Such a pouch-type battery cell may be formed by accommodating an electrode assembly in a pouch case of a laminate sheet including a resin layer and a metal layer, and then thermally sealing the outer periphery of the pouch case. In this case, the battery cell 110 may be formed in a rectangular sheet-like structure.

The battery cells 110 may be configured in plurality, and the plurality of battery cells 110 are stacked to be electrically connected to each other to form the battery cell stack 120 . In particular, as shown in FIG. 4 , a plurality of battery cells 110 may be stacked in a direction parallel to the x-axis.

The module frame 200 accommodating the battery cell stack 120 may include an upper cover 220 and a U-shaped frame 210 .

The U-shaped frame 210 may include a bottom portion 210a and two side portions 210b extending upward from both ends of the bottom portion 210a. The bottom part 210a may cover the lower surface of the battery cell stack 120 , and the side part 210b may cover both sides of the battery cell stack 120 .

The upper cover 220 may be formed in a plate-shaped structure that covers the lower surface covered by the U-shaped frame 210 and the upper surface (z-axis direction) other than the both sides. The upper cover 220 and the U-shaped frame 210 may form a structure that covers the battery cell stack 120 up, down, left, and right by being coupled by welding or the like in a state in which the corresponding corner portions are in contact with each other. The battery cell stack 120 may be physically protected through the upper cover 220 and the U-shaped frame 210 . To this end, the upper cover 220 and the U-shaped frame 210 may include a metal material having a predetermined strength.

Meanwhile, although not specifically illustrated, the module frame 200 according to the modified example may be a mono frame in the form of a metal plate in which the upper surface, the lower surface and both sides are integrated. That is, the U-shaped frame 210 and the upper cover 220 are not mutually coupled to each other, but may be manufactured by extrusion molding to have a structure in which the upper surface, the lower surface, and both sides are integrated.

The end plate 400 may be positioned on both open sides (y-axis direction) corresponding to the open of the module frame 200 to cover the battery cell stack 120 . The end plate 400 may physically protect the battery cell stack 120 and other electrical components from external impact.

Meanwhile, although not specifically illustrated, a bus bar frame on which a bus bar is mounted and an insulating cover for electrical insulation may be positioned between the battery cell stack 120 and the end plate 400 .

The module frame 200 according to the present embodiment may include a module frame protrusion 211 protruding from the bottom 210a of the module frame 200 to pass the end plate 400 . At this time, the refrigerant may be supplied to or discharged from the heat sink 300 by the cooling port 500 connected to the upper surface of the module frame protrusion 211 . That is, the battery module according to the present embodiment may include cooling ports 500 for supplying refrigerant to the heat sink 300 or discharging the refrigerant from the heat sink 300 .

Specifically, the cooling port 500 according to the present embodiment includes a refrigerant injection port 500a for supplying a refrigerant to the heat sink 300 and a refrigerant discharge port 500b for discharging the refrigerant from the heat sink 300 . and the refrigerant injection port 500a and the refrigerant discharge port 500b may be respectively connected to a pack refrigerant supply pipe and a pack refrigerant discharge pipe, which will be described later. The module frame protrusion 211 may include a first module frame protrusion and a second module frame protrusion positioned to be spaced apart from each other on one side of the module frame 200 , and the refrigerant injection port 500a is disposed on the first module frame protrusion. is disposed, the refrigerant discharge port (500b) may be disposed on the second module frame protrusion.

Hereinafter, the heat sink according to the present embodiment will be described in detail.

Referring back to FIGS. 4 and 5 , the bottom part 210a of the module frame 200 constitutes an upper plate of the heat sink 300 , and the recessed part 340 of the heat sink 300 and the module frame 200 . ) of the bottom portion 210a may form a flow path of the refrigerant.

Specifically, the heat sink 300 may be formed under the module frame 200 . The heat sink 300 forms a skeleton of the heat sink 300 and is directly joined to the bottom 210a of the module frame 200 by welding or the like, and a depression that is a path through which the refrigerant flows. (340) may be included. Also, the heat sink 300 may include a heat sink protrusion 300P protruding from one side of the heat sink 300 to a portion where the module frame protrusion 211 is located. That is, the recessed portion 340 may extend to the two heat sink protrusions 300P, and the two heat sink protrusions 300P may be a portion in which a refrigerant is introduced and a portion through which the refrigerant is discharged, respectively. To this end, the heat sink protrusion 300P may be positioned to correspond to the module frame protrusion 211 in which the cooling port 500 is formed.

The heat sink protrusion 300P and the module frame protrusion 211 may be directly connected to each other by welding or the like.

The recessed portion 340 of the heat sink 300 corresponds to a portion in which the lower plate 310 is recessed downward. The depression 340 may be a U-shaped tube with a cross section cut vertically in the xz plane or yz plane based on the direction in which the refrigerant flow path extends, and the bottom portion 210a is located on the open upper side of the U-shaped tube. can As the lower plate 310 of the heat sink 300 comes into contact with the bottom part 210a, the space between the recessed part 340 and the bottom part 210a becomes a region through which the coolant flows, that is, the flow path of the coolant. Accordingly, the bottom portion 210a of the module frame 200 may be in direct contact with the refrigerant.

There is no particular limitation on the manufacturing method of the recessed part 340 of the heat sink 300, but by providing a structure recessed with respect to the plate-shaped heat sink 300, the U-shaped recessed part 340 with an open upper side may be formed. can

This depression 340 may lead from one of the heat sink protrusions 300P to the other, as described above. The refrigerant supplied through the refrigerant injection port 500a is first introduced into the space between the depression 340 and the bottom 210a through between the first module frame protrusion and the heat sink protrusion 300P. Thereafter, the refrigerant moves along the depression 340 , passes between the second module frame protrusion and the heat sink protrusion 300P, and is discharged through the refrigerant discharge port 500b.

Meanwhile, although not shown, a thermally conductive resin layer including a thermally conductive resin may be positioned between the bottom 210a of the module frame 200 of FIG. 4 and the battery cell stack 120 . The thermally conductive resin layer may be formed by applying a thermally conductive resin to the bottom portion 210a, and curing the applied thermally conductive resin.

The thermally conductive resin may include a thermally conductive adhesive material, and specifically, may include at least one of a silicone material, a urethane material, and an acrylic material. The thermally conductive resin may serve to fix one or more battery cells 110 constituting the battery cell stack 120 by being liquid during application or curing after application. In addition, heat generated in the battery cell 110 can be quickly transferred to the lower side of the battery module because of its excellent thermal conductivity.

On the other hand, the battery module 100 according to the present embodiment implements a cooling integrated structure of the module frame 200 and the heat sink 300 to further improve cooling performance. Since the bottom portion 210a of the module frame 200 serves to correspond to the top plate of the heat sink 300 , a cooling integrated structure may be implemented. Cooling efficiency is increased due to direct cooling, and the heat sink 300 is integrated with the bottom part 210a of the module frame 200 through a structure in which the battery module 100 and the battery module 100 are mounted on the battery pack. Space utilization can be further improved.

Specifically, the heat generated in the battery cell 110 is a thermally conductive resin layer (not shown) positioned between the battery cell stack 120 and the bottom part 210a, the bottom part 210a of the module frame 200, It may be transferred to the outside of the battery module 100 through the refrigerant. By removing the conventional unnecessary cooling structure, the heat transfer path is simplified and the air gap between each layer can be reduced, so that the cooling efficiency or performance can be increased. In particular, since the bottom portion 210a is constituted by the upper plate of the heat sink 300 and the bottom portion 210a directly contacts the coolant, there is an advantage that more direct cooling is possible through the coolant. In the related art, as shown in FIG. 2 , the upper configuration of the heat transfer member 50 and the heat sink 60 is positioned between the bottom part 31 and the refrigerant, which can be compared with a decrease in cooling efficiency.

In addition, the height of the battery module 100 is reduced through the removal of the unnecessary cooling structure, thereby making it possible to reduce costs and increase space utilization. Furthermore, since the battery module 100 can be arranged compactly, the capacity or output of the battery pack including a plurality of the battery modules 100 can be increased.

Meanwhile, the bottom portion 210a of the module frame 200 may be joined to a portion of the lower plate 310 in which the recessed portion 340 is not formed in the heat sink 300 through welding. In this embodiment, through the integrated cooling structure of the bottom portion 210a of the module frame 200 and the heat sink 300 , the above-described cooling performance is improved as well as the battery cell stack 120 accommodated in the module frame 200 . It may have the effect of supporting the load of the battery module 100 and reinforcing the rigidity of the battery module 100 . In addition, the lower plate 310 and the bottom portion 210a of the module frame 200 are sealed through welding, etc., so that the refrigerant can flow through the depression 340 formed inside the lower plate 310 without leakage. have.

For effective cooling, as shown in FIG. 5 , it is preferable that the recessed portion 340 is formed over the entire area corresponding to the bottom portion 210a of the module frame 200 . To this end, the recessed portion 340 may be bent at least once and lead from one side to the other. In particular, in order to form the depression 340 over the entire area corresponding to the bottom portion 210a of the module frame 200, the depression portion 340 is preferably bent several times. As the refrigerant moves from the start point to the end point of the refrigerant passage formed over the entire area corresponding to the bottom 210a of the module frame 200, efficient cooling of the entire area of the battery cell stack 120 can be achieved. .

Meanwhile, the refrigerant is a medium for cooling, and there is no particular limitation, but may be cooling water.

Hereinafter, a battery pack according to an embodiment of the present invention will be described with reference to FIGS. 6 and 7 .

6 is an exploded perspective view illustrating a battery pack according to an embodiment of the present invention. 7 is an exploded perspective view illustrating the pack refrigerant tube assembly and the pack refrigerant tube housing included in the battery pack of FIG. 6 .

6 and 7 , a battery pack 1000 according to an embodiment of the present invention includes a plurality of battery modules 100 including battery cells; Pack frame 1100 for accommodating the battery modules 100; a pack refrigerant pipe assembly 600 connected to the battery module 100; and a pack refrigerant tube housing 700 for accommodating the pack refrigerant tube assembly 600 .

Referring to FIG. 4 together with FIGS. 6 and 7 , in this embodiment, the battery modules 100 included in the battery pack 1000 are arranged in two rows in the direction in which the battery cells 110 are stacked, and the battery cells ( 110) includes a first battery module and a second battery module facing each other in a direction perpendicular to the stacking direction. The first battery module and the second battery module may refer to the battery module 100 spaced apart from each other on the left and right in FIG. 6 . A pack refrigerant tube assembly 600 may be disposed between the first battery module and the second battery module.

In this embodiment, the pack refrigerant pipe assembly 600 is disposed between the battery modules 100 adjacent to each other. In the space between the battery modules 100 adjacent to each other in which the pack refrigerant tube assembly 600 is disposed, the cooling ports 500 formed in each of the battery modules 100 adjacent to each other as shown in FIG. 6 are all to be disposed. can At this time, the refrigerant injection port 500a formed in any one of the neighboring battery modules 100 and the refrigerant discharge port 500b formed in the other battery module 100 may be disposed facing each other. .

The pack refrigerant pipe assembly 600 may include a pack refrigerant pipe 610 and a connection port 620 connecting the pack refrigerant pipe 610 and the cooling port 500 .

The pack refrigerant pipe 610 is a main pack refrigerant pipe 611 connected to the inlet 720a and the outlet 730a, and a sub-pack refrigerant pipe 612 connecting the main pack refrigerant pipe 611 and the battery module 100. ) may be included. In particular, the sub-pack refrigerant pipe 612 may be connected to the battery module 100 through the connection port 620 . In addition, the sub-pack refrigerant tubes 612 may cross each other and extend. One of the crossed sub-pack refrigerant pipes 612 may be a sub-pack refrigerant supply pipe 612a, and the other may be a sub-pack refrigerant discharge pipe 612b.

Since the pack refrigerant pipe 610 according to the present embodiment has the arrangement structure as described above, it is possible to implement a cooling integrated structure with the battery modules 100 in the battery pack 1000 . Accordingly, it is possible to increase the space utilization rate and at the same time improve the cooling efficiency. The height of the crossed sub-pack refrigerant supply pipe 612a and the height of the sub-pack refrigerant discharge pipe 612b may be different from each other so as to have the arrangement structure of the pack refrigerant pipe 610 as described above. A portion in which the height of the sub-pack refrigerant supply pipe 612a and the height of the sub-pack refrigerant discharge pipe 612b are different from each other may be a part.

Meanwhile, the main pack refrigerant pipe 611 may include a main pack refrigerant supply pipe 611a and a main pack refrigerant discharge pipe 611b. The main pack refrigerant supply pipe 611a may be connected to the sub pack refrigerant supply pipe 612a , and the main pack refrigerant discharge pipe 611b may be connected to the sub pack refrigerant discharge pipe 612b .

8 is a perspective view illustrating a part of each of the battery module 100 , the pack refrigerant pipe 610 , the pack refrigerant pipe housing 700 , and the second gasket 920 according to an embodiment of the present invention.

6 to 8 , the connection port 620 connects the cooling port 500 and the pack refrigerant pipe 610 . As described above, the cooling port 500 may include a refrigerant injection port 500a and a refrigerant discharge port 500b, and the pack refrigerant pipe 610 includes a sub-pack refrigerant supply pipe 612a and a sub-pack refrigerant discharge pipe ( 610b).

At this time, the connection port 620 may connect between the refrigerant injection port 500a and the sub-pack refrigerant supply pipe 612a and between the refrigerant discharge port 500b and the sub-pack refrigerant discharge pipe 612b, respectively. The connection port 620 is connected to each of the refrigerant injection ports 500a for supplying refrigerant to the plurality of battery modules 100 and each refrigerant discharge port 500b for discharging the refrigerant from the plurality of battery modules 100, respectively. connected.

The pack refrigerant tube housing 700 accommodates the pack refrigerant tube assembly 600 . The plurality of battery modules 100 may be arranged in a grid, and the pack refrigerant tube assembly 600 and the pack refrigerant tube housing 700 may be arranged between the battery modules 100 . At this time, the sub pack refrigerant pipe 612 extends from one end of the main pack refrigerant pipe 611 in both directions perpendicular to the longitudinal direction of the main pack refrigerant pipe 611 , and the pack refrigerant pipe housing 700 is the main pack The refrigerant pipe 611 and the sub-pack refrigerant pipe 612 may continue along the extended portions.

Meanwhile, as described above, the main pack refrigerant pipe 611 may be connected to the inlet 720a and the outlet 730a. The pack refrigerant tube housing 700 may include an inlet connection unit 720 and an outlet connection unit 730 formed respectively at positions corresponding to the inlet 720a and the outlet 730a. The inlet connection unit 720 and the outlet connection unit 730 may include a penetrating portion into which the inlet 720a and the outlet 730a may be inserted.

The battery pack 1000 may be applied to transportation means such as an electric vehicle or a hybrid, and a refrigerant such as coolant may leak due to an assembly defect or an accident while driving. The leaked refrigerant may penetrate into a plurality of components constituting the battery pack 1000 and cause a fire or explosion. According to this embodiment, the pack refrigerant tube housing 700 is formed to cover the bottom surface and side surfaces of the pack refrigerant tube assembly 600, so that the refrigerant leaked from the pack refrigerant tube assembly 600 is the pack refrigerant tube housing 700 ) to stay inside, it is possible to prevent the leaking refrigerant from penetrating into other components in the battery pack 1000 . At this time, it is preferable to secure the maximum volume of the pack refrigerant tube housing 700 by utilizing the space between the plurality of battery modules 100 so that the pack refrigerant tube housing 700 can accommodate the leaked refrigerant as much as possible.

The open upper portion of the pack refrigerant tube housing 700 may be covered by a housing cover 700C. Through this, it is possible to prevent the refrigerant leaking from the pack refrigerant tube assembly 600 from leaking into the upper open space of the pack refrigerant tube housing 700 .

A first gasket 910 may be positioned between the pack refrigerant tube housing 700 and the housing cover 700C. The first gasket 910 seals between the pack refrigerant tube housing 700 and the housing cover 700C. The first gasket 910 may be formed along an upper edge of the pack refrigerant tube housing 700 . The housing cover 700C may be combined with the first gasket 910 formed along the upper edge of the pack refrigerant tube housing 700 to block the refrigerant leakage to the upper side of the pack refrigerant tube housing 700 .

Hereinafter, the connection relationship between the cooling port and the connection port and the arrangement and shape of the second gasket according to an embodiment of the present invention will be described in detail with reference to FIGS. 8 to 11 .

9 is a partial view showing a connection port and a cooling port according to the present embodiment. 10 is a plan view of the battery pack viewed from the top down so that the bottom surface of the pack refrigerant tube housing according to an embodiment of the present invention is visible. 11 is a cross-sectional view showing a portion cut along the cutting line B-B' of FIG. 6 . In particular, for convenience of explanation, illustration of the pack refrigerant tube housing and the second gasket is omitted in FIG. 9 , and illustration of the housing cover and the pack refrigerant tube assembly is omitted in FIG. 10 .

8 to 11 , an opening 710P may be formed in the bottom surface of the pack refrigerant tube housing 700 according to the present embodiment. A second gasket 920 may be coupled to a portion in which the opening 710P is formed.

Specifically, the second gasket 920 may be positioned between the module frame protrusion 211 and the pack refrigerant tube housing 700 to seal between the module frame protrusion 211 and the pack refrigerant tube housing 700 . At this time, the cooling port 500 may protrude into the pack refrigerant tube housing 700 by penetrating the second gasket 920 and the opening 710P from the upper surface of the module frame protrusion 211 upward. The connection port 620 may be coupled to the cooling port 500 by penetrating the opening 710P and the second gasket 920 downward. As shown in FIG. 8 , the second gasket 920 may include a penetrating portion through which the cooling port 500 or the connection port 620 may pass therethrough.

On the other hand, the cooling port 500 is coupled between the connection ports 620 , as shown in FIG. 9 , the cooling port 500 is inserted and coupled to the lower side of the connection port 620 , and the lower end of the connection port 620 . may be in contact with the upper surface of the module frame protrusion 211 . That is, in a form in which the cooling port 500 is inserted into the connection port 620 , the cooling port 500 and the connection port 620 may be coupled. As described above, in FIG. 9 , the illustration of the pack refrigerant tube housing 700 and the second gasket 920 is omitted for convenience of explanation, and in fact, the second gasket ( 920) and the pack refrigerant tube housing 700 may be located.

Meanwhile, a sealing member 630 may be positioned between the cooling port 500 and the connection port 620 . The sealing member 630 may have a ring shape, and may be fitted between the cooling port 500 and the connection port 620 . The sealing member 630 may be inserted into the connection port 620 together with the cooling port 500 while being inserted into the cooling port 500 . The sealing member 630 may prevent the refrigerant from leaking through the gap between the cooling port 500 and the connection port 620 .

As such, the pack refrigerant tube assembly 600 located inside the pack refrigerant tube housing 700 and the cooling port 500 for supplying and discharging refrigerant to and from the plurality of battery modules 100 are connected to each other to circulate the refrigerant, An opening 710P is required to connect the pack refrigerant pipe assembly 600 and the cooling port 500 . In addition, as in the present embodiment, the second gasket 920 is formed on the outside of the opening 710P, so that the space between the bottom surface of the pack refrigerant tube housing 700 and the module frame protrusion 211 where the cooling port 500 is formed. By sealing, it is possible to prevent the refrigerant collected inside the pack refrigerant tube housing 700 from leaking through the opening 710P. That is, it is possible to block the leakage of the refrigerant to the lower portion of the pack refrigerant tube housing 700 .

Meanwhile, referring to FIGS. 10 and 11 , a coupling hole 710CH may be formed in the bottom surface of the pack refrigerant tube housing 700 . A coupling member 740 may be inserted into the coupling hole 710CH as shown in FIG. 11 . The coupling member 740 may be inserted into the coupling hole 710CH to couple the pack refrigerant tube housing 700 and the pack frame 1100 . A stable cooling structure may be formed by fixing the pack refrigerant tube housing 700 to the pack frame 1100 through the coupling member 740 and the coupling hole 710CH.

Referring back to FIG. 11 , on the outside of the pack refrigerant tube assembly 600 according to the present embodiment, the pack refrigerant tube housing 700 , the housing cover 700C, the first gasket 910 and the second gasket 920 . A refrigerant watertight structure is formed through the Therefore, through the pack refrigerant pipe assembly 600, a structural device is provided to prevent the leaked refrigerant from penetrating into the parts inside the battery pack, and at the same time, the refrigerant collected in the leaked refrigerant pipe housing 700 is drained using a drain valve, etc. Thus, the leaked refrigerant can be managed more efficiently by discharging it to the outside.

Hereinafter, a pack refrigerant tube housing provided with a drain valve according to another embodiment of the present invention will be described in detail.

12 is a perspective view illustrating a battery pack according to another embodiment of the present invention. 13 is a partial perspective view illustrating a connection relationship between the battery modules included in the battery pack of FIG. 12 and the pack refrigerant tube assembly. In FIG. 13 , the illustration of the pack refrigerant tube housing is omitted for convenience of explanation. 14 is an exploded perspective view illustrating the pack refrigerant tube assembly and the pack refrigerant tube housing included in the battery pack of FIG. 12 .

4, 12, 13 and 14 , a battery pack 1000 according to another embodiment of the present invention includes a plurality of battery modules 100 including battery cells; Pack frame 1100 for accommodating the battery modules 100; a pack refrigerant pipe assembly 600 connected to the battery module 100; and a pack refrigerant tube housing 700 for accommodating the pack refrigerant tube assembly 600 .

The pack refrigerant pipe assembly 600 according to the present embodiment may include a pack refrigerant pipe 610 and a connection port 620 connecting the pack refrigerant pipe 610 and the cooling port 500 . The pack refrigerant pipe 610 may include a pack refrigerant supply pipe 610a and a pack refrigerant discharge pipe 610b. Here, the pack refrigerant supply pipe 610a covers the main pack refrigerant supply pipe and the sub-pack refrigerant supply pipe described above, and the pack refrigerant discharge pipe 610b covers the main pack refrigerant discharge pipe and the sub-pack refrigerant discharge pipe described above.

As described above, the battery module may include a cooling port 500 , and the cooling port 500 may include a refrigerant injection port 500a and a refrigerant discharge port 500b that are spaced apart from each other. The refrigerant injection port 500a and the refrigerant discharge port 500b may be connected to the pack refrigerant supply pipe 610a and the pack refrigerant discharge pipe 610b, respectively.

The refrigerant is supplied to the heat sink 300 of the battery module 100 through the pack refrigerant supply pipe 610a, and the refrigerant can be discharged from the heat sink 300 of the battery module 100 through the pack refrigerant discharge pipe 610b. have.

At this time, the pack refrigerant supply pipe 610a may be connected to the plurality of battery modules 100 to supply refrigerant, and the pack refrigerant discharge pipe 610b may be connected to the plurality of battery modules 100 to discharge the refrigerant. More details will be described later below.

15 is a cross-sectional view showing a portion taken along the cutting line C-C' of FIG. 12 . In particular, Figure 15 shows a cross section of the pack refrigerant tube and the pack refrigerant tube housing.

14 and 15 , as described above, the battery pack 1000 according to the present embodiment includes a pack refrigerant tube housing 700 accommodating the pack refrigerant tube assembly 600 , and the pack refrigerant tube housing 700 continues along the pack refrigerant conduit 610 of the pack refrigerant conduit assembly 600 .

The pack refrigerant tube housing 700 may accommodate the pack refrigerant tube 610 including the pack refrigerant supply tube 610a and the pack refrigerant discharge tube 610b, with the upper side open, and the pack refrigerant tube housing 700 The open upper side of the housing cover 700C may be covered.

The battery pack 1000 may be applied to transportation means such as an electric vehicle or a hybrid, and a refrigerant such as coolant may leak due to an assembly defect or an accident while driving. The leaked refrigerant may penetrate into a plurality of components constituting the battery pack 1000 and cause a fire or explosion. Accordingly, the battery pack 1000 according to this embodiment includes a pack refrigerant tube housing 700 accommodating the pack refrigerant tube assembly 600, so that the leaked refrigerant is collected on the bottom surface of the pack refrigerant tube housing 700, It was prevented from penetrating into other components in the battery pack 1000 . At this time, it is preferable that the pack refrigerant tube housing 700 has a deep depth in a direction perpendicular to the bottom surface thereof so that the refrigerant pack housing 700 can effectively collect the refrigerant.

On the other hand, the connection port 620 in the pack refrigerant supply pipe (610a) and the pack refrigerant discharge pipe (610b) passes through the opening of the pack refrigerant pipe housing 700, respectively, the refrigerant injection port (500a) and the refrigerant discharge port (500b) and can be connected That is, a plurality of openings may be formed on the bottom surface of the pack refrigerant tube housing 700 so that the connection ports 620 may be connected to the refrigerant injection port 500a or the refrigerant discharge port 500b. In addition, it is preferable that a second gasket 920 corresponding to the opening is provided to prevent leakage through the opening. Since the opening 710P (refer to FIG. 8 or FIG. 10) and the second gasket 920 have been described in detail with reference to FIGS. 8 to 10, further descriptions will be omitted.

16 (a) and (b) are partial views of the area indicated by “D” in FIG. 15 viewed from different angles.

Referring to FIGS. 14, 15 and 16 (a) and (b), the battery pack 1000 according to the present embodiment may include a drain valve 800 having a structure that can be opened and closed, and , this drain valve 800 may be formed on the bottom surface of the pack refrigerant tube housing 700 .

A first outlet 700H may be formed in the pack refrigerant tube housing 700 , and a second outlet 1100H may be formed in the pack frame 1100 accommodating a plurality of battery modules 100 , and a drain valve 800 may connect the first outlet 700H and the second outlet 1100H.

On the other hand, the drain valve 800 includes a spacer 810 in which a connecting pipe 811 connecting the first outlet 700H and the second outlet 1100H is formed, and a drain plug 820 inserted into the connecting pipe 811 . may include. Through the configuration of the spacer 810 and the drain plug 820 , the drain valve 800 may have a structure that can be opened and closed.

Specifically, the connecting pipe 811 of the spacer 810 may include a first connecting pipe 811a in the direction of the first outlet 700H and the second connecting pipe 811b in the direction of the second outlet 1100H. and the first connecting pipe 811a may have a smaller inner diameter than the second connecting pipe 811b. The drain plug 820 may include an insertion part 821 having a diameter corresponding to the inner diameter of the first connecting pipe 811a and a fixing part 822 having a diameter corresponding to the inner diameter of the second connecting pipe 811b. can

The insertion part 821 of the drain plug 820 is inserted into the first connection pipe 811a of the spacer 810 so that the drain valve 800 can be closed, and the refrigerant leaked from the pack refrigerant pipe 610 is removed from the pack. It may be collected on the bottom surface of the refrigerant tube housing 700 . In addition, since the fixing part 822 is caught without being inserted into the first connection pipe 811a , it is possible to prevent the drain plug 820 from entering the pack refrigerant pipe housing 700 .

The drain valve 800 may further include a sealing ring 830 positioned between the spacer 810 and the drain plug 820 . Specifically, after the sealing ring 830 is inserted into the insertion part 821 , it may be positioned between the step formed by the first connection pipe 811a and the second connection pipe 811b and the fixing part 822 . By providing the sealing ring 830, it is possible to prevent the refrigerant from leaking through the gap between the insertion part 821 is inserted into the first connection pipe 811a.

Meanwhile, referring to FIG. 14 , the battery pack 1000 according to the present embodiment may further include a leak detection sensor 900 accommodated in the pack refrigerant tube housing 700 . In particular, the leak detection sensor 900 leads to the bottom surface of the pack coolant tube housing 700 , and can detect the refrigerant collected on the bottom surface of the pack coolant tube housing 700 . When the refrigerant leaks from the pack refrigerant tube assembly 600 , the leaked refrigerant is collected on the bottom surface of the pack refrigerant tube housing 700 . The leak detection sensor 900 may detect the leaked refrigerant and send a signal. According to this signal, the drain plug 820 may be removed from the spacer 810 to discharge the refrigerant to the outside of the pack frame 1100 through the first outlet 700H and the second outlet 1100H. That is, according to the present embodiment, the refrigerant leaked from the pack refrigerant tube assembly 600 through the pack refrigerant tube housing 700 is prevented from penetrating into other components in the battery pack 1000 , while the drain valve 800 and the leakage The refrigerant leaked through the detection sensor 900 may be discharged to the outside of the battery pack 1000 according to circumstances. Through the above process, it is possible to prevent the leakage of the refrigerant from leading to a fire or explosion of the battery pack 1000 .

17 and 18 are plan views showing a battery pack according to an embodiment of the present invention, respectively.

First, referring to FIGS. 4, 13 and 17, the plurality of battery modules 100 included in the battery pack 1000 according to this embodiment are arranged in two rows in the direction in which the battery cells 110 are stacked, The battery cells 110 may include a first battery module 100a and a second battery module 100b facing each other in a direction perpendicular to the stacking direction. As shown in FIG. 17 , the first battery module 100a and the second battery module 100b may refer to battery modules spaced apart from each other on the left and right. A refrigerant injection port 500a and a refrigerant discharge port 500b may be disposed between the first battery module 100a and the second battery module 100b. Accordingly, the pack refrigerant pipe 610 of the pack refrigerant pipe assembly 600 may also be disposed between the first battery module 100a and the second battery module 100b. In addition, among the battery modules 100 facing each other, the refrigerant injection port 500a formed in the first battery module 100a and the refrigerant discharge port 500b formed in the second battery module 100b are disposed facing each other. can 13 also shows a state in which the coolant injection port 500a and the coolant discharge port 500b are disposed to face each other in the battery module 100 facing each other.

The pack refrigerant supply pipe 610a and the pack refrigerant discharge pipe 610b may extend while crossing each other. By having such an arrangement structure, it is possible to increase the space utilization rate and at the same time improve the cooling efficiency while implementing the integrated structure of the cooling structure with the plurality of battery modules 100 . In other words, the refrigerant injection port 500a formed in the first battery module 100a and the refrigerant discharge port 500b formed in the second battery module 100b are arranged to face each other, and then the pack refrigerant supply pipe 610a and the pack As the refrigerant discharge pipe 610b crosses each other, the pack refrigerant supply pipe 610a is connected to the refrigerant injection ports 500a, and the pack refrigerant discharge pipe 610b is connected to the refrigerant discharge ports 500b. One pack refrigerant supply pipe (610a) and one pack refrigerant discharge pipe (610b) was configured to be connected to each of the plurality of battery modules (100). Through this, a plurality of battery modules 100 and the pack refrigerant pipe 610 can be efficiently disposed without unnecessary space waste.

In order to have the arrangement structure of the pack refrigerant pipe 610 as described above, the height of the pack refrigerant supply pipe 610a and the height of the pack refrigerant discharge pipe 610b may be different from each other. A portion in which the height of the pack refrigerant supply pipe 610a and the height of the pack refrigerant discharge pipe 610b are different from each other may be a part.

The module frame protrusion 211 included in the battery module 100 described with reference to FIG. 5 is formed to extend past the end plate 400 , and the module frame protrusion 211 , the pack refrigerant pipe 610 is disposed with each other. It may be located in a space between neighboring battery modules 100 . The heat sink 300 described in FIG. 4 includes a heat sink protrusion 300P protruding from one side of the heat sink 300 toward a portion where the module frame protrusion 211 is located, and includes the heat sink protrusion 300P and the module. The frame protrusions 211 may be bonded to each other. In this case, the heat sink protrusion 300P and the module frame protrusion 211 may be directly joined by welding or the like.

Next, referring to FIGS. 4, 13 and 18 , a plurality of battery modules 100 according to this embodiment are arranged in two rows in a direction in which the battery cells 110 are stacked, and the battery cells 110 are stacked. It may include a first battery module 100a and a second battery module 100b facing each other in a direction perpendicular to the direction. A refrigerant injection port 500a and a refrigerant discharge port 500b may be disposed between the first battery module 100a and the second battery module 100b.

At this time, the pack refrigerant pipe 610 may be continued along one direction while being positioned between the first battery module 100a and the second battery module 100b, and in order to receive and discharge the refrigerant, a part of the It may lead between adjacent battery modules in a direction perpendicular to one direction. That is, as described in FIG. 7 , the pack refrigerant pipe 610 includes the main pack refrigerant pipe 611 and the sub pack refrigerant pipe 612 extending in both directions perpendicular to the longitudinal direction of the main pack refrigerant pipe 611 , respectively. may include

Accordingly, the pack refrigerant tube housing 700 is a first portion 700a extending in one direction between the first battery module 100a and the second battery module 100b and in a direction perpendicular to the one direction. A second portion 700b extending between adjacent battery modules may be included. That is, the pack refrigerant tube housing 700 including the first portion 700a and the second portion 700b when viewed from above as in FIG. 18 may form a T-shaped structure. The sub-pack refrigerant pipe 612 (refer to FIG. 7) is accommodated in the first part 700a, and the main pack refrigerant pipe 611 (refer to FIG. 7) is accommodated in the second part 700b.

Meanwhile, referring back to FIG. 4 , a protrusion pattern 340D may be formed in the recessed portion 340 of the heat sink 300 according to the present exemplary embodiment. In the case of a large-area battery module in which the number of stacked battery cells, such as the battery cell stack 120 according to the present embodiment, increases significantly compared to the prior art, the width of the refrigerant passage may be formed to be wider, so that the temperature deviation may be more severe. . In the large-area battery module, it may include a case in which about 32 to 48 battery cells are stacked in one battery module compared to the case in which about 12 to 24 battery cells are stacked in one battery module. . In this case, the protrusion pattern 340D according to the present exemplary embodiment has the effect of substantially reducing the width of the cooling passage, thereby minimizing the pressure drop and reducing the temperature deviation between the widths of the refrigerant passage. Therefore, it is possible to implement a uniform cooling effect.

In this embodiment, terms indicating directions such as front, back, left, right, up, and down are used, but these terms are for convenience of explanation only, and may vary depending on the position of the object or the position of the observer. .

One or more battery modules according to the present embodiment described above may be mounted together with various control and protection systems such as a battery management system (BMS), a battery disconnect unit (BDU), and a cooling system to form a battery pack.

The battery module or battery pack may be applied to various devices. Specifically, it may be applied to transportation means such as an electric bicycle, an electric vehicle, a hybrid, or an ESS (Energy Storage System), but is not limited thereto and may be applied to various devices that can use a secondary battery.

Although the preferred embodiment of the present invention has been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims are also provided. is within the scope of the

200: module frame
211: module frame protrusion
300: heat sink
500: cooling port
600: pack refrigerant tube assembly
610: pack refrigerant pipe
620: connection port
700: pack refrigerant tube housing
800: drain valve
900: leak detection sensor
1000: battery pack
1100: Pack Frame

Claims (21)

a plurality of battery modules including battery cells;
a pack frame accommodating the battery modules;
a pack refrigerant pipe assembly connected to the battery module; and
A battery pack comprising a pack refrigerant tube housing for accommodating the pack refrigerant tube assembly. In claim 1,
a housing cover covering an upper portion of the pack refrigerant tube housing; and
The battery pack further comprising a first gasket sealing between the pack refrigerant tube housing and the housing cover. In claim 1,
An opening is formed in a bottom surface of the pack refrigerant tube housing, and a second gasket is coupled to the portion in which the opening is formed. In claim 3,
The battery module,
a battery cell stack in which the battery cells are stacked;
a module frame for accommodating the battery cell stack;
a heat sink positioned below the bottom of the module frame; and
and cooling ports for supplying refrigerant to the heat sink or discharging the refrigerant from the heat sink;
The module frame includes a module frame protrusion protruding from the bottom of the module frame,
The second gasket is located between the module frame protrusion and the pack refrigerant tube housing. In claim 4,
The bottom portion of the module frame constitutes an upper plate of the heat sink,
A battery pack in which a bottom portion of the module frame is in contact with the refrigerant. In claim 4,
The cooling port, in the upper surface of the protrusion of the module frame, through the second gasket and the opening, the battery pack protruding into the inside of the pack refrigerant tube housing. In claim 4,
The pack refrigerant pipe assembly includes a pack refrigerant pipe and a connection port connecting the pack refrigerant pipe and the cooling port,
The connection port passes through the opening and the second gasket to be coupled to the cooling port. In claim 7,
The cooling port is inserted and coupled to the lower side of the connection port, and the lower end of the connection port is in contact with the upper surface of the module frame protrusion. In claim 7,
A battery pack having a sealing member positioned between the cooling port and the connection port. In claim 1,
A coupling hole is formed in the bottom surface of the pack refrigerant tube housing,
A coupling member is inserted into the coupling hole to couple the pack refrigerant tube housing and the pack frame. In claim 1,
The battery pack further comprising a drain valve formed on the bottom surface of the pack refrigerant tube housing and having a structure that can be opened and closed. In claim 11,
A first outlet is formed in the pack refrigerant tube housing,
A second outlet is formed in the pack frame,
The drain valve is a battery pack connecting the first outlet and the second outlet. In claim 12,
The drain valve may include a spacer having a connecting pipe connecting the first outlet and the second outlet, and a drain plug inserted into the connecting pipe. In claim 13,
The connector includes a first connector in the direction of the first outlet and a second connector in the direction of the second outlet,
The first connector has a smaller inner diameter than the second connector,
The drain plug may include an insertion part having a diameter corresponding to an inner diameter of the first connector tube and a fixing part having a diameter corresponding to an inner diameter of the second connector tube. In claim 13,
The drain valve further includes a sealing ring positioned between the spacer and the drain plug. In claim 1,
The battery pack further comprising a leak detection sensor accommodated in the pack refrigerant tube housing. In claim 1,
The battery modules are arranged in a grid,
The pack refrigerant tube assembly and the pack refrigerant tube housing are disposed between the battery modules. In claim 17,
The pack refrigerant pipe assembly includes a pack refrigerant pipe,
The pack refrigerant pipe includes a main pack refrigerant pipe and a sub-pack refrigerant pipe connecting the main pack refrigerant pipe and the battery modules,
The sub-pack refrigerant pipe extends in both directions perpendicular to the longitudinal direction of the main pack refrigerant pipe from one end of the main pack refrigerant pipe,
The pack refrigerant tube housing may extend along portions where the main pack refrigerant tube and the sub-pack refrigerant tube extend. In claim 1,
The battery module may include a heat sink; a refrigerant injection port for supplying a refrigerant to the heat sink and a refrigerant discharge port for discharging the refrigerant from the heat sink;
A battery pack in which the refrigerant injection port formed in one of the neighboring battery modules and the refrigerant discharge port formed in the other battery module face each other. In paragraph 19,
The battery modules are arranged in two rows in a direction in which the battery cells are stacked, and include a first battery module and a second battery module facing each other in a direction perpendicular to the direction in which the battery cells are stacked,
The battery pack in which the refrigerant injection port and the refrigerant discharge port are disposed between the first battery module and the second battery module. A device comprising the battery pack according to claim 1 .

Images