KR20230008531A - Battery module, battery pack including the same and manufacturing method of secondary battery - Google Patents

Abstract

The present invention includes a battery module and a battery pack including the same. The battery module according to an embodiment of the present invention includes: a battery cell stack formed by stacking a plurality of battery cells; a module frame for accommodating the battery cell stack; and a passage formed inside the module frame, wherein holes machined inside the module frame are connected to each other in the passage.

Description

Battery module, battery pack including the same, and method for manufacturing a secondary battery

The present invention relates to a battery module, a battery pack including the same, and a method for manufacturing a secondary battery, and more particularly, to a battery module in which a module frame and a heat sink are integrated, and a battery pack including the same.

As the use of portable devices such as mobile phones, laptop computers, camcorders, and digital cameras has become commonplace in modern society, development of technologies in fields related to the above mobile devices has become active. In addition, secondary batteries capable of charging and discharging are a solution to air pollution, such as existing gasoline vehicles using fossil fuels, electric vehicles (EVs), hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles ( P-HEV), etc., the need for development of secondary batteries is increasing.

Currently commercialized secondary batteries include nickel cadmium batteries, nickel hydrogen batteries, nickel zinc batteries, and lithium secondary batteries. , it is in the limelight due to its very low self-discharge rate and high energy density.

These lithium secondary batteries mainly use lithium-based oxides and carbon materials as positive electrode active materials and negative electrode active materials, respectively. A lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate coated with such a positive electrode active material and a negative electrode active material are disposed with a separator therebetween, and a battery case in which the electrode assembly is sealed and housed together with an electrolyte solution.

In general, lithium secondary batteries can 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, depending on the shape of an exterior material.

In the case of secondary batteries used in small devices, 2-3 battery cells are disposed, but in the case of secondary batteries used in medium-large devices such as automobiles, a battery module electrically connecting multiple battery cells this is used In this battery module, capacity and output are improved by forming a battery cell stack in which a plurality of battery cells are connected in series or parallel to each other. 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.

When the temperature of the secondary battery is higher than an appropriate temperature, the performance of the secondary battery may deteriorate, and in severe cases, there is a risk of explosion or ignition. In particular, in a battery module or battery pack having a plurality of secondary batteries, that is, battery cells, the temperature of a battery module or battery pack having a plurality of battery cells may increase rapidly and severely due to the sum of heat emitted from the plurality of battery cells 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 battery cell deteriorates rapidly, shortens its lifespan, and increases the possibility of explosion or ignition.

Moreover, battery modules included in vehicle battery packs are frequently exposed to direct sunlight and may be placed in high temperature conditions such as summer or desert areas. Therefore, when constructing a battery module or battery pack, it can be said that it is very important to secure stable and effective cooling performance.

However, in the conventional battery module, a heat sink is attached to the lower part of the module frame, and heat generated from the battery cell passes through the bottom of the module frame, the heat transfer member, and the heat sink in order along the direction toward the heat sink. passed outside of the module. As described above, the conventional battery module has a complicated heat transfer path, making it difficult for heat generated from the battery cell to be effectively transferred to the outside.

Accordingly, in a trend where demands such as capacity increase for battery modules continue, it is practically necessary to develop a battery module capable of satisfying these various requirements while improving cooling performance.

An object to be solved by the present invention is to provide a battery module and a battery pack including the battery module in which cooling performance is improved and space utilization is increased by simplifying the cooling structure.

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

A battery module according to an embodiment of the present invention includes a battery cell laminate formed by stacking a plurality of battery cells; A module frame accommodating the battery cell stack; and a flow path formed inside the module frame, and a plurality of holes processed inside the module frame may be connected to each other in the flow path.

The hole may pass through one end and the other end of the module frame.

The passage may be formed at the bottom of the module frame.

The module frame may include a wave pattern part inside the module frame.

The wave pattern part may correspond to a shape of the flow path.

The module frame may be formed of an Al60-based material.

The battery module according to another embodiment of the present invention may further include a thermally conductive resin layer positioned between the battery cell stack and the module frame.

The module frame may include a wave pattern portion formed on a surface adjacent to the battery cell stack, and the thermally conductive resin layer may include the same wave pattern portion as the wave pattern portion formed on the module frame.

The battery module according to another embodiment of the present invention may further include side plates positioned at one end and the other end of the module frame in which the passage is formed.

A battery pack according to another embodiment of the present invention includes at least one of the above battery modules; and a pack case packaging the at least one battery module.

A method for manufacturing a secondary battery according to an embodiment of the present invention includes a battery cell stack formed by stacking a plurality of battery cells, a module frame accommodating the battery cell stack, and a flow path formed inside the module frame, , A method of manufacturing a secondary battery in which a heat sink including the flow path and the module frame are integrally formed, comprising: accommodating the battery cell stack in the module frame; and forming the flow path inside the module frame.

Forming the passage may include forming a hole inside the module frame; and connecting holes formed inside the module frame to each other.

In the step of forming a hole inside the module frame, a plurality of holes are formed penetrating one end and the other end of the module frame, and in the step of connecting the holes to each other, a plurality of holes formed inside the module frame They may be formed by being connected to each other.

In the step of forming the hole inside the module frame, the channel may be formed at the bottom of the module frame.

In the step of forming the flow path, the module frame may include a wave pattern formed on a surface adjacent to the battery cell stack, and the wave pattern part may be formed together while the flow path is formed inside the module frame.

In the step of forming the flow path, the flow path may be formed by extrusion molding on the module frame.

According to embodiments, the cooling performance of a battery module having a heat sink integrally formed with a module frame and a battery pack including the same may be improved, space utilization may be increased, and manufacturing cost may be reduced.

The 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 battery module according to a comparative example.
FIG. 2 is a cross-sectional view of the battery module taken along the line AA′ of FIG. 1 .
3 is a perspective view showing 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 showing a bottom portion of a battery module according to an embodiment of the present invention.
6 is a view of the bottom of the battery module of FIG. 4 viewed from the z-axis direction.
7 is a view of the frame of the battery module of FIG. 4 viewed from the y-axis direction.
8 is a cross-sectional view showing the battery module according to an embodiment of the present invention taken along the line BB′ of FIG. 3 .
9 is a cross-sectional view showing a battery module according to another embodiment of the present invention taken along the cut line BB′ of FIG. 3 .
10 and 11 are flowcharts illustrating a method of manufacturing a secondary battery including a battery module according to an embodiment of the present invention.
12 is a view showing the bottom of the module frame in the step of forming a hole inside the module frame.
13 is a view showing the bottom of the module frame in the step of connecting the holes formed inside the module frame to each other.

Hereinafter, various embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. This invention may be embodied in many different forms and is not limited to the embodiments set forth herein.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

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

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

In addition, throughout the specification, when a certain component is said to "include", it means that it may further include other components without excluding other components unless otherwise stated.

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

1 is a perspective view of a battery module according to a comparative example. FIG. 2 is a cross-sectional view showing the battery module cut along the cutting line A-A′ of FIG. 1 .

Referring to FIGS. 1 and 2 , in the battery module 10 according to the comparative example, a plurality of battery cells 11 are stacked to form a battery cell stack, and the battery cell stack is accommodated in the module frame 20 . The bottom part 21a of the module frame 20 constitutes an upper plate of the heat sink 30, and the lower plate 31 of the heat sink 30 and the bottom part 21a of the module frame 20 are used to store the refrigerant. A flow path 230 may be formed. A thermally conductive resin layer 60 may be positioned between the battery cell stack and the module frame 20, and heat generated in the battery cell stack moves to the heat sink 30 through the thermal conductive resin layer 60. can be cooled

The module frame 20 may be a metal material, preferably an Al30-based material. In this case, the module frame 20 may have low strength because heat treatment is not possible.

The bottom portion 21a of the module frame 20 may be joined to the lower plate 31 of the heat sink 30 by welding. Specifically, brazing welding using clad metal may be used. Brazing welding is a method of joining metal materials without melting by providing a low melting point metal between metal materials in joining between metal materials. A clad layer 70 may be formed between the bottom portion 21a and the lower plate 31 by brazing.

The bottom part 21a of the module frame 20 and the lower plate 31 of the heat sink 30 are sealed by brazing welding, so that the battery module 10 integrates the module frame 20 and the heat sink 30. may be in the form of

When the bottom portion 21a of the module frame 20 and the lower plate 31 of the heat sink 30 are coupled by brazing welding, dimensions may be unstable. In addition, since a heat sink press must be separately manufactured to manufacture the heat sink 30 , process cost may increase.

3 is a perspective view showing 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 showing a bottom portion of a battery module according to an embodiment of the present invention. 6 is a view of the bottom of the battery module of FIG. 4 viewed from the z-axis direction. 7 is a view of the frame of the battery module of FIG. 4 viewed from the y-axis direction. 8 is a cross-sectional view showing a battery module according to an embodiment of the present invention taken along the cutting line BB′ of FIG. 3 .

3 to 8, the battery module 100 according to an embodiment of the present invention includes a battery cell stack 120 in which a plurality of battery cells 110 are stacked, and a battery cell stack 120. It includes a module frame 200 for receiving and a side plate 300 positioned at one end and the other end of the module frame 200.

First, the battery cell 110 may be a pouch type battery cell. Such a pouch-type battery cell may be formed by housing an electrode assembly in a pouch case of a laminate sheet including a resin layer and a metal layer, and then heat-sealing a sealing portion of the pouch case. At this time, the battery cell 110 may be formed in a rectangular sheet-like structure.

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

Hereinafter, a specific structure of the module frame 200 will be described in detail with reference to FIGS. 5 and 8 . 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 211 extending upward from both ends of the bottom portion 210a. The bottom portion 210a may cover the lower surface (-z-axis direction) of the battery cell stack 120, and the side portion 211 may cover both sides (x-axis direction and -x-axis direction) of the battery cell stack 120. direction) can be covered.

The upper cover 220 may be formed of a single plate-like structure surrounding the upper surface (in the z-axis direction) except for the lower surface and both side surfaces covered by the U-shaped frame 210 . 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 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. The module frame 200 may be made of an Al60-based material, and may be heat treated to have high strength.

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

A flow path 230 may be formed inside the module frame 200 . The passage 230 may have a plurality of holes passing through one end and the other end of the module frame 200 , and a plurality of holes formed inside the module frame 200 may be connected to each other. In this drawing, the flow path 230 is shown as being located at the bottom portion 210a of the module frame 200, but is not limited thereto and may be located anywhere inside the module frame 200. The passage 230 may be formed by extruding the module frame 200 .

When the flow path 230 is formed inside the module frame 200, a wave pattern unit 240 may be formed on the surface of the module frame 200 adjacent to the battery cell stack 120. The wave pattern unit 240 may be formed at a position corresponding to the flow path 230 . The wave pattern unit 240 may be located on the first surface 210f of the module frame 200 . The first surface 210f may be one surface of the module frame 200 adjacent to the battery cell stack 120 . In FIG. 5, the wave pattern 240 is located on the first surface 210f of the bottom portion 210a of the module frame 200, but is not limited to this figure, and the module frame in which the flow path 230 is formed ( 200) may be located on the first surface 210f.

When the battery cells 110 are stacked, the wavy pattern unit 240 may be positioned to correspond to a gap between the battery cells 110 formed as the battery cells 110 are stacked. In this case, the battery cell stack 120 is mounted to the module frame 200 while the gaps between the wave pattern unit 240 and the battery cells 110 are positioned to correspond, so that the battery cells 110 are better fixed, Durability and stability of the battery module 100 may be improved.

The cooling port 250 formed in the module frame 200 may supply a refrigerant to the flow path 230 . The refrigerant may be cooling water. Referring to FIG. 4 , the cooling port 250 is located at the bottom 210a of the module frame 200, but is not limited thereto, and any surface of the module frame 200 is the surface where the flow path 230 is located. may also be located.

Hereinafter, a specific structure of the side plate 300 will be described in detail with reference to FIGS. 6 and 7 . The side plate 300 has a rectangular shape and may be positioned on the first side (y-axis direction) and the second side (-y-axis direction) of the bottom portion 210a of the module frame 200 . The side plate 300 may have a length corresponding to the length of the bottom portion 210a of the module frame 200 (in the x-axis direction), and the thickness of the lower frame 210a of the module frame 200 (in the z-axis direction). ) and a corresponding thickness (z-axis direction). However, the shape and position of the side plate 300 is not limited to this drawing, and may correspond to the shape and position of the module frame 200 in which the flow path 230 is formed. In addition, the side plate 300 may have a shape corresponding to the entire module frame 200 with respect to the first side (y-axis direction) and the second side (-y-axis direction) of the module frame 200 .

The side plate 300 may block the flow path 230 located in the module frame 200 from the external environment. Accordingly, when the refrigerant passes through the passage 230, it is possible to prevent contamination from the external environment and prevent the refrigerant from leaking out of the passage 230, thereby improving the cooling performance of the battery.

Referring to FIG. 4 , the end plate 400 is positioned on the open first side (y-axis direction) and second side (-y-side direction) of the module frame 200 to cover the battery cell stack 120. can be formed to The end plate 400 may physically protect the battery cell stack 120 and other electrical components from external impact.

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

9 is a cross-sectional view showing a battery module according to another embodiment of the present invention taken along the cutting line BB′ of FIG. 3 .

In the battery module according to another embodiment of the present invention, a thermally conductive resin layer 600 including a thermal resin between the bottom portion 210a of the module frame 200 and the battery cell stack 120 ) can be located. The thermally conductive resin layer 600 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 in a liquid state during application or hardened after application. In addition, heat generated in the battery cell 110 can be quickly transferred to the lower side of the battery module 100 due to excellent thermal conductivity.

Heat generated from the battery cell 110 passes through the thermally conductive resin layer 600 located between the battery cell stack 120 and the bottom portion 210a, the bottom portion 210a of the module frame 200, and the refrigerant. Since it can be transferred to the outside of the module 100, the heat transfer path is simplified by removing the conventional unnecessary cooling structure, and the air gap between each layer can be reduced, so cooling efficiency or performance can be increased.

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

When the thermally conductive resin layer 600 is positioned between the battery cell stack 120 and the bottom portion 210a of the module frame 200 including the wave pattern portion 240, the bottom portion of the module frame 200 One side of the thermally conductive resin layer 600 contacting 210a may be formed in a shape corresponding to the wavy pattern portion 240 of the bottom portion 210a. In this case, the amount of the thermally conductive resin used in forming the thermally conductive resin layer 600 is reduced compared to the case where the wave pattern portion 240 is not present on the bottom portion 210a of the module frame 200, so that the amount is small. Since the battery cell laminate can be fixed even with a thermally conductive resin of, manufacturing cost can be reduced.

10 and 11 are flowcharts illustrating a method of manufacturing a secondary battery including a battery module according to an embodiment of the present invention. 12 is a view showing the bottom of the module frame in the step of forming a hole inside the module frame. 13 is a view showing the bottom of the module frame in the step of connecting the holes formed inside the module frame to each other.

10 to 13, the secondary battery including the battery module of the present invention includes a step of accommodating a battery cell stack in a module frame (S1) and a step of forming a flow path inside the module frame (S2). can include

In the step of accommodating the battery cell stack in the module frame (S1), the battery cell may be a pouch-type battery cell. Such a pouch-type battery cell may be formed by housing an electrode assembly in a pouch case of a laminate sheet including a resin layer and a metal layer, and then heat-sealing a sealing portion of the pouch case. At this time, the battery cell may be formed in a rectangular sheet-like structure.

These battery cells may be composed of a plurality, and the plurality of battery cells are stacked so as to be electrically connected to each other to form a battery cell laminate. In particular, as shown in FIG. 4 , a plurality of battery cells may be stacked along a direction parallel to the x-axis.

The module frame for accommodating the battery cell stack may include an upper cover and a U-shaped frame.

The U-shaped frame may include a bottom portion 210a and two side portions extending upward from both ends of the bottom portion 210a. Referring to FIG. 4, the bottom portion 210a may cover the lower surface (-z-axis direction) of the battery cell stack, and the side portion covers both sides (x-axis direction and -x-axis direction) of the battery cell stack. can cover

The upper cover may be formed of a single plate-like structure surrounding the remaining upper surface (z-axis direction) except for the lower surface and both side surfaces surrounded by the U-shaped frame. The upper cover and the U-shaped frame may form a structure that covers the battery cell stack up, down, left, and right by being coupled by welding or the like in a state in which corresponding corner portions are in contact with each other. The battery cell stack may be physically protected through the upper cover and the U-shaped frame. To this end, the upper cover and the U-shaped frame may include a metal material having a predetermined strength. The module frame 200 may be made of an Al60-based material, and may be heat treated to have high strength.

On the other hand, the module frame 200 is not limited to the above form, and 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, it may not be a structure in which the U-shaped frame and the upper cover are coupled to each other, but a structure in which the upper surface, the lower surface, and both sides are integrated by extrusion molding.

In the step of forming the flow path inside the module frame (S2), the flow path 230 may be formed inside the module frame 200. The passage 230 may be formed by passing through one end and the other end of the module frame 200 and having a plurality of holes 231 formed therein, and connecting the plurality of holes 231 formed inside the module frame 200 to each other. . The passage 230 may be formed by extruding the module frame 200 . This will be described in detail with reference to FIGS. 12 and 13 . 12 and 13 illustratively show cross-sections of the module frame cut along line C-C′ of FIG. 5, and are not limited to holes and passages formed at the bottom of the module frame.

Forming the flow path inside the module frame (S2) may include forming a hole inside the module frame (S21) and connecting the holes formed inside the module frame to each other (S22).

Referring to FIG. 12 , in step S21 of forming a hole inside the module frame, a plurality of holes 231 may be formed penetrating one end and the other end of the module frame 200 . The plurality of holes 231 may be formed by extruding the module frame 200 .

Referring to FIG. 13 , in step S22 of connecting holes formed inside the module frame to each other, adjacent holes 231 may be connected to each other. Specifically, when the first hole 231a is connected to the adjacent second hole 231b in an area adjacent to the other end of the module frame 200, the second hole 231b is connected to the other adjacent third hole 231c and the module. It may be connected in an area adjacent to one end of the frame 200 . That is, the first hole 231a and the second hole 231b are connected in an area adjacent to the other end of the module frame 200 (a region shown by a dotted line), and the second hole 231b is connected to the third hole 231c. One end of the module frame 200 and an adjacent region (region shown by a dotted line) may be connected to form one flow path as a whole. That is, one end and the other end of each hole 231 may be alternately connected to adjacent holes 231 . By connecting the plurality of holes 231 to each other, one flow path 230 may be formed.

When the flow path 230 is formed inside the module frame, a wave pattern portion may be formed on the surface of the module frame 200 adjacent to the battery cell stack. The wave pattern part may be formed at a position corresponding to the flow path 230 . The wave pattern unit may be located on the first surface of the module frame 200 . The first surface may be one surface of the module frame 200 adjacent to the battery cell stack. Referring to FIG. 5 , the wave pattern unit is located on the first surface of the bottom of the module frame 200, but is not limited to this drawing, and on the first surface of the module frame 200 where the flow path 230 is formed. can be located

When the battery cells are stacked, the wavy pattern unit may be positioned to correspond to a gap between the battery cells formed as the battery cells are stacked. In this case, since the battery cell laminate is mounted on the module frame 200 while the wave pattern portion and the gaps between the battery cells correspond to each other, the battery cells are better fixed, and durability and stability of the battery module can be improved. The battery module described above and the battery pack including the battery module may be applied to various devices. Such a device may be applied to means of transportation such as an electric bicycle, an electric vehicle, or a hybrid vehicle, but the present invention is not limited thereto and is applicable to various devices capable of using a battery module and a battery pack including the battery module, which is also applicable to the present invention. It belongs to the scope of the right of invention.

14 is a view showing a module frame in which a flow path is formed. FIG. 14 exemplarily shows a cross section of the module frame cut along line C-C′ of FIG. 5, and is not limited to a flow path formed at the bottom of the module frame.

Referring to FIG. 14, after processing the module frame 200 and connecting adjacent holes to each other to form one flow path 230, side plates 300 and cooling ports are provided at one end and the other end of the module frame 200, respectively. 250 may be located.

The side plate 300 has a rectangular shape and may be positioned on the first side (y-axis direction) and the second side (-y-axis direction) of the module frame 200 . The side plate 300 may have a length corresponding to the length (x-axis direction) of the module frame 200 and may have a thickness corresponding to the thickness of the module frame 200 . However, the shape and position of the side plate 300 are not limited thereto, and may correspond to the shape and position of the module frame 200 in which the passage 230 is formed. In addition, the side plate 300 may have a shape corresponding to the entirety of the module frame 200 with respect to the first side (y-axis direction) and the second side (-y-axis direction) of the module frame 200 .

The side plate 300 may block the flow path 230 located in the module frame 200 from the external environment. Accordingly, when the refrigerant passes through the passage 230, it is possible to prevent contamination from the external environment and prevent the refrigerant from leaking out of the passage 230, thereby improving the cooling performance of the battery.

The cooling port 250 formed in the module frame 200 may supply a refrigerant to the flow path 230 . The refrigerant may be cooling water. Referring to the drawing, when refrigerant is supplied to the cooling port 250 formed at one end of the module frame 200, the refrigerant may absorb heat generated from the battery module while moving in the direction of the arrow. However, the moving direction of the refrigerant is not limited to this drawing, and when the refrigerant is supplied to the cooling port 250 formed at the other end of the module frame 200, the refrigerant moves in the opposite direction to the direction of the arrow shown in the drawing. Heat generated from the battery module may be absorbed.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concept of the present invention defined in the following claims are also made according to the present invention. falls within the scope of the rights of

100: battery module
110: battery cell
120: battery cell stack
200: module frame
210: U-shaped frame
210a: bottom part
211: side part
220: upper cover
250: cooling port
300: side plate
400: end plate
230: Euro
231: hall
240: wave pattern unit

Claims (17)

A battery cell laminate formed by stacking a plurality of battery cells;
A module frame accommodating the battery cell stack; and
Including a flow path formed inside the module frame,
The flow path is a battery module formed by connecting a plurality of holes processed inside the module frame to each other. In paragraph 1,
The hole is a battery module passing through one end and the other end of the module frame. In paragraph 1,
The flow path is a battery module formed at the bottom of the module frame. In paragraph 1,
The module frame includes a wave pattern portion formed on a surface adjacent to the battery cell stack. In paragraph 4,
The wave pattern portion is a battery module corresponding to the shape of the flow path. In paragraph 1,
The module frame is a battery module formed of an Al60-based material. In paragraph 1,
A battery module further comprising a thermally conductive resin layer positioned between the battery cell laminate and the module frame. In paragraph 7,
The module frame includes a wave pattern portion formed on a surface adjacent to the battery cell stack,
The thermally conductive resin layer includes a wave pattern portion identical to the wave pattern portion formed on the module frame. In paragraph 1,
The battery module further comprises side plates positioned at one end and the other end of the module frame in which the flow path is formed. In paragraph 9,
The side plate is located in a region corresponding to the hole penetrating one end and the other end of the module frame. The battery module according to claim 1; and
A battery pack comprising a pack case for packaging the at least one battery module. A battery cell stack formed by stacking a plurality of battery cells, a module frame accommodating the battery cell stack, and a flow path formed inside the module frame, wherein the heat sink including the flow path and the module frame are integrated. In the manufacturing method of a secondary battery formed of,
accommodating the battery cell stack in the module frame; and
A method of manufacturing a secondary battery comprising forming the flow path inside the module frame. In paragraph 12,
Forming the flow path,
forming a hole inside the module frame; and
A method of manufacturing a secondary battery comprising connecting holes formed inside the module frame to each other. In paragraph 13,
In the step of forming a hole inside the module frame, a plurality of holes are formed penetrating one end and the other end of the module frame,
In the step of connecting the holes to each other, a plurality of holes formed inside the module frame are connected to each other to form a secondary battery manufacturing method. In paragraph 14,
In the step of forming the hole inside the module frame, the flow path is formed at the bottom of the module frame. In paragraph 12,
In the step of forming the flow path, the module frame includes a wave pattern formed on a surface adjacent to the battery cell stack,
The wavy pattern part is formed together with the flow path being formed inside the module frame. In clause 16,
In the step of forming the flow path,
The method of manufacturing a secondary battery in which the passage is formed by extrusion molding on the module frame.

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