CN220121952U - Battery module and battery pack including the battery module - Google Patents

Abstract

A battery module and a battery pack including the same are disclosed. A battery module according to an embodiment of the present disclosure includes: a battery cell stack including a plurality of battery cells stacked together; a module frame accommodating the battery cell stack; the first heat dissipation component is inserted between the battery monomers; and a second heat dissipation member interposed between the module frame and an outermost battery cell of the battery cell stack.

Description

Battery module and battery pack including the battery module

Technical field

Cross-references to related applications

This application claims the benefit of Korean Patent Application No. 10-2021-0051383 filed with the Korean Intellectual Property Office on April 20, 2021, the contents of which are incorporated herein by reference in their entirety.

The present disclosure relates to a battery module and a battery pack including the battery module, and more particularly, to a battery module with improved cooling performance and a battery pack including the battery module.

Background technique

In modern society, with the daily use of portable devices such as mobile phones, laptop computers, video cameras, and digital cameras, the development of technology in fields related to the above-mentioned mobile devices has been active. In addition, rechargeable/dischargeable secondary batteries are used as power sources for electric vehicles (EV), hybrid vehicles (HEV), plug-in hybrid vehicles (P-HEV), etc., in an attempt to solve the problem of existing gasoline using fossil fuels. Air pollution caused by vehicles, etc. Therefore, there is an increasing demand for the development of secondary batteries.

Currently commercialized secondary batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries and lithium secondary batteries. Among them, lithium secondary batteries have attracted attention because they have the following advantages. For example, compared with nickel-based secondary batteries, lithium secondary batteries hardly exhibit a memory effect, thereby charging and discharging freely, and have very low self-efficiency. discharge rate and high energy density.

This lithium secondary battery mainly uses lithium-based oxide and carbonaceous materials as positive electrode active materials and negative electrode active materials respectively. A lithium secondary battery includes: an electrode assembly in which positive and negative electrode plates coated with positive and negative active materials respectively are arranged with a separator interposed therebetween; and a battery case that connects the electrode assembly and an electrolyte solution Seal and contain together.

Generally, based on the shape of the external material, lithium secondary batteries can be divided into can-type secondary batteries in which the electrode assembly is built in a metal can, and pouch-type secondary batteries in which the electrode assembly is built in a pouch of an aluminum laminate. .

In the case of a secondary battery for a small device, two to three battery cells are arranged, but in the case of a secondary battery for a medium or large device such as a car, a large number of battery cells are used in which a large number of cells are electrically connected. battery module. In this battery module, a large number of battery cells are connected to each other in series or parallel to form a battery cell assembly, thereby increasing capacity and output. In addition, one or more battery modules can be installed together with various control and protection systems such as BMS (battery management system) and cooling systems to form a battery pack.

When the temperature of the secondary battery rises above the appropriate temperature, the performance of the secondary battery deteriorates and, in the worst case, there is a risk of explosion or fire. In particular, a large number of secondary batteries, that is, a battery module or a battery pack having battery cells can add heat generated by a large number of battery cells in a narrow space, so that the temperature can rise faster and excessively. In other words, a battery module in which a large number of battery cells are stacked and a battery pack equipped with such a battery module can obtain high output, but it is not easy to remove heat generated by the battery cells during charging and discharging. When the heat dissipation of the battery cells is not performed appropriately, the degradation of the battery cells is accelerated, the lifespan is shortened, and the possibility of explosion or fire increases.

In addition, in the case of medium- or large-sized battery modules included in vehicle battery packs, they are often exposed to direct sunlight and may be placed in high-temperature conditions such as summer or desert areas.

Therefore, when configuring a battery module or battery pack, it is very important to ensure cooling performance stably and effectively.

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

Referring to FIGS. 1 and 2 , a conventional battery module 10 is configured such that a plurality of battery cells 11 are stacked to form a battery cell stack 20 , and the battery cell stack 20 is accommodated in a module frame 30 .

As mentioned above, since the battery module 10 includes a plurality of battery cells 11, it generates a large amount of heat during charging and discharging. As a cooling device, the battery module 10 may include a thermally conductive resin layer 40 between the battery cell stack 20 and the bottom 31 of the module frame 30 . In addition, when the battery module 10 is installed on the battery pack frame to form a battery pack, the heat transfer member 50 and the heat sink 60 may be sequentially located below the battery module 10 .

The heat generated by the battery cells 11 sequentially passes through the thermally conductive resin layer 40 , the bottom 31 of the module frame 30 , the heat transfer member 50 and the heat sink 60 to be transferred to the outside of the battery module 10 .

Thus, in the case of the conventional battery module 10, since the heat transfer path is complicated as described above, it is difficult to effectively transfer the heat generated by the battery cells 11. Furthermore, in the case of the conventional battery module 10, the heat generated by the battery cells 11 is transferred only through a one-way path connected with the thermally conductive resin layer 40 and the bottom 31 of the module frame 30, so that heat transfer is limited. Therefore, an additional heat transfer path capable of transferring the heat generated by the battery cells 11 to the outside is required.

Therefore, since other demands such as capacity increase with respect to battery modules are continuously growing, there is actually a need to develop a battery module that can satisfy these various demands while improving the cooling performance of the battery cells.

Utility model content

technical problem

An object of the present disclosure is to provide a battery module with improved cooling performance and a battery pack including the battery module.

However, problems to be solved by the embodiments of the present disclosure are not limited to the above-mentioned problems, and various extensions can be made within the scope of the technical concepts included in the present disclosure.

Technical solutions

According to an embodiment of the present disclosure, a battery module is provided, including: a battery cell stack in which a plurality of battery cells are stacked; and a module frame accommodating the battery cell stack. The battery module includes: a battery cell inserted in a first heat dissipation member between; and a second heat dissipation member interposed between the module frame and the outermost battery cell of the battery cell stack.

The module frame includes: a frame member for covering the lower part and both sides of the battery cell stack; and an upper plate for covering the upper part of the battery cell stack, and the first and second heat dissipation members may be in contact with the frame member.

The frame member includes: a side surface portion for covering a side surface of the battery cell stack; and a bottom portion for covering a lower surface of the battery cell stack, the first heat dissipation member may be in contact with the bottom, and the second heat dissipation member may be in contact with the bottom and Side surface contact.

The first heat dissipation member and the second heat dissipation member may be in contact with the upper plate.

The battery module according to one embodiment of the present disclosure further includes a thermally conductive resin layer between a lower surface of the battery cell stack and a bottom of the frame member, and the first and second heat dissipation members may be in contact with the thermally conductive resin layer.

The first heat dissipation member and the second heat dissipation member may have a tubular shape having an empty space formed in parallel with the side surface portion of the frame member.

The first heat dissipation member and the second heat dissipation member according to one embodiment of the present disclosure may be formed into a hexahedral structure with a hollow interior.

The first heat dissipation member and the second heat dissipation member according to one embodiment of the present disclosure may be formed into a hexahedral structure in which upper and lower parts are open and a part of the side surface part is open.

A plurality of first heat dissipation members may be formed to be interposed between the battery cells.

The second heat dissipation member may be formed to be in contact with one side surface portion of the frame member.

The first heat dissipation member and the second heat dissipation member may be formed to have a vertical length longer than a vertical length of the battery cell.

According to another embodiment of the present disclosure, a battery pack is provided, including: a battery module; a heat transfer member located under a bottom of the battery module; and a heat sink located under the heat transfer member.

beneficial effects

A battery module according to an embodiment of the present disclosure includes a heat dissipation member interposed between battery cells, and the heat dissipation member forms a plurality of heat transfer paths, thereby enabling improved cooling performance.

In addition, the heat dissipation member includes an air gap, thereby being able to efficiently transfer heat generated by the battery cells while simultaneously achieving the effect of preventing heat transfer between the battery cells.

The effects of the present disclosure are not limited to the above-described effects, and those skilled in the art will clearly understand additional other effects not described above from the description of the appended claims.

Description of the drawings

1 is a perspective view showing a conventional battery module;

Figure 2 is a cross-sectional view showing a cross-section taken along cutting line A-A' of Figure 1;

3 is a perspective view illustrating a battery module according to one embodiment of the present disclosure;

Figure 4 is an exploded perspective view of the battery module of Figure 3;

FIG. 5 is a perspective view showing battery cells included in the battery module of FIG. 4;

6 is a cross-sectional view showing a portion of the cross-section taken along cutting line B-B′ of FIG. 3;

7 is a perspective view illustrating a heat dissipation member according to one embodiment of the present disclosure;

8 is a perspective view illustrating a heat dissipation member according to another embodiment of the present disclosure;

9 is a perspective view illustrating a heat dissipation member according to another embodiment of the present disclosure;

Figure 10 is a cross-sectional view of a battery pack according to yet another embodiment of the present disclosure.

Detailed ways

Hereinafter, various embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. The disclosure may be modified in various ways and is not limited to the embodiments set forth herein.

Portions irrelevant to the description will be omitted to clearly describe the present disclosure, and the same drawing descriptions represent the same elements throughout the specification.

In addition, in the drawings, the size and thickness of each element are randomly shown for convenience of description, and the present disclosure is not necessarily limited to what is shown in the drawings. In the drawings, the thickness of layers, regions, etc., are exaggerated for clarity. In the drawings, the thicknesses of some layers and regions are exaggerated for convenience of description.

In addition, it will be understood that when an element such as a layer, film, region or plate is referred to as being "on" or "over" another element, it can be directly on the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, this means that there are no other intervening elements present. In addition, the words "on" or "above" mean being disposed above or below the reference part, and do not necessarily mean being disposed at the upper end of the reference part in the opposite direction to gravity.

Additionally, throughout this specification, when a section is referred to as "comprising" or "comprising" a particular component, this means that the section may also include other components, but not exclude other components, unless stated otherwise.

In addition, throughout the specification, when it is called a "plane", it means when the target part is viewed from the upper side, and when it is called a "cross-section", it means when the cross-section is cut vertically from the side. When observing the target part.

The terms "first", "second", etc. may be used to explain various components, but the components should not be limited by the terms. These terms are only used to distinguish one component from another.

3 is a perspective view illustrating a battery module according to one embodiment of the present disclosure. FIG. 4 is an exploded perspective view of the battery module of FIG. 3 . FIG. 5 is a perspective view showing battery cells included in the battery module of FIG. 4 . 6 is a cross-sectional view showing a portion of the cross-section taken along cutting line B-B′ of FIG. 3 .

Referring to FIGS. 3 to 6 , the battery cell 100 according to the present embodiment includes: a battery cell stack 120 formed by stacking a plurality of battery cells 110 ; a module frame 200 for accommodating the battery cell stack 120 ; and an insertion device. A heat dissipation member 500 between the battery cells 110 and/or between the module frame 200 and the outermost battery cell 110 of the battery cell stack 120 . More specifically, the first heat dissipation member 500 a may be interposed between the battery cells, and the second heat dissipation member 500 b may be interposed between the module frame 200 and the outermost battery cell 110 of the battery cell stack 120 . Hereinafter, except for the difference between the first heat dissipation member 500a and the second heat dissipation member 500b, for convenience of explanation, they will be collectively described as the heat dissipation member 500.

First, the battery cell 110 is preferably a pouch-type battery cell, and may be formed into a rectangular sheet structure. For example, the battery cell 110 according to the present embodiment has a structure in which two electrode leads 111 and 112 face each other and respectively extend from one end 114 a and the other end 114 b of the battery cell body 113 . That is, the battery cell 110 includes electrode leads 111 and 112 extending in opposite directions to each other. More specifically, the electrode leads 111 and 112 are connected to an electrode assembly (not shown) and extend from the electrode assembly (not shown) to the outside of the battery cell 110 .

Meanwhile, a battery may be manufactured by joining both end portions 114a and 114b of the battery cell case 114 and one side portion 114c connecting them with an electrode assembly (not shown) being accommodated in the battery cell case 114 Single body 110. In other words, the battery cell 110 according to the present embodiment has a total of three sealing parts 114sa, 114sb, and 114sc, wherein the sealing parts 114sa, 114sb, and 114sc have a structure sealed by a method such as heat sealing, and the remaining other side part It can be formed by the connection part 115. The battery cell case 114 may be composed of a laminate including a resin layer and a metal layer.

In addition, the connecting portion 115 may extend longer along one edge of the battery cell 11 , and a bat ear 110 p may be formed at an end of the connecting portion 115 . Furthermore, when the battery cell case 114 is sealed with the extended electrode leads 111 and 112 interposed therebetween, a platform portion 116 may be formed between the electrode leads 111 and 112 and the battery cell body 113 . That is, the battery cell 110 includes the platform portion 116 formed to extend from the battery cell case 114 in the extending direction of the electrode leads 111 and 112 .

The battery cells 110 may be configured in plural numbers, and the plurality of battery cells 110 may be stacked so as to be electrically connected to each other, thereby forming 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 y-axis. Thereby, the electrode leads 111 and 112 can extend toward the x-axis direction and the -x-axis direction, respectively.

At the same time, when charging and discharging of the battery cells 110 are repeated, heat is generated. Even among them, a large amount of heat is generated in portions adjacent to the electrode leads 111 and 112 . That is, when approaching the platform portion 116 rather than the center portion of the battery cell body 113, more heat is generated in response to charging and discharging.

The module frame 200 for accommodating the battery cell stack 120 may include: a frame member 300 for covering a lower portion and both side surfaces of the battery cell stack 120 ; and an upper plate 400 for covering an upper portion of the battery cell stack 120 .

The frame member 300 may include a bottom 300a and two side surface portions 300b extending upward from both ends of the bottom 300a. The bottom portion 300a may cover a lower surface of the battery cell stack 120, and the side surface portions 300b may cover both side surfaces of the battery cell stack 120. Here, the lower surface of the battery cell stack 120 refers to the surface in the -z-axis direction, and the two side surfaces of the battery cell stack 120 refer to the surfaces in the y-axis and -y-axis directions. However, these are aspects mentioned for convenience of explanation and may vary depending on the position of the target object or the position of the observer.

The upper plate 400 may be formed as a single plate-like structure wrapping the lower surface wrapped by the frame member 300 and the remaining upper surface (surface in the z-axis direction) except for the two side surfaces. The upper plate 400 and the frame member 300 may be joined by welding or the like with corresponding corner portions in contact with each other, thereby forming a structure that covers the battery cell stack 120 vertically and horizontally. The battery cell stack 120 may be physically protected by the upper plate 400 and the frame member 300 . To this end, the upper plate 220 and the frame member 300 may include a metal material having a predetermined strength.

Meanwhile, although not specifically shown in the figure, the module frame 200 according to the modification may be a single frame in the form of a metal plate in which the upper surface, the lower surface and the two side surfaces are integrated. That is, this may be a structure in which the upper surface, the lower surface, and both side surfaces are integrated by extrusion molding manufacturing, rather than a structure in which the upper plate 400 and the frame member 300 are coupled to each other.

Meanwhile, the battery module 100 according to the present embodiment may include end plates 150 covering the front and rear surfaces of the battery cell stack 120 respectively. Here, the front surface of the battery cell stack 120 refers to the surface in the x-axis direction, and the rear surface of the battery cell stack 120 refers to the surface in the -x-axis direction.

The end plates 150 may be located at open both sides of the module frame 200 so that they may be formed to cover the battery cell stack 120 and may physically protect the battery cell stack 120 and other electronic instruments from external impacts.

Meanwhile, the bus bar frame 130 on which the bus bars are mounted, an insulating cover for electrical insulation, and the like may be located between the battery cell stack 120 and the end plate 150 .

In addition, the battery module 100 according to this embodiment further includes a thermally conductive resin layer 310 located between the lower surface of the battery cell stack 120 and the bottom 300a of the frame member 300, and the thermally conductive resin layer 310 can function to connect the battery cells 110. The generated heat is transferred to the bottom of the battery module 100 and fixes the function of the battery cell stack 120 .

Next, the heat dissipation member of the battery module according to the present embodiment will be described in detail with reference to FIGS. 6 and 7 .

7 is a perspective view showing a heat dissipation member according to one embodiment of the present disclosure.

Referring back to FIG. 6 , the heat dissipation member 500 according to this embodiment may include: a first heat dissipation member 500 a interposed between the battery cells 110 ; and an outermost battery inserted between the module frame 200 and the battery cell stack 120 The second heat dissipation member 500b between the cells 110. In particular, the second heat dissipation member 500b may be formed to be interposed between the side surface portion 300b of the frame member 300 and the outermost battery cell 110 of the battery cell stack 120.

At this time, as described above, the module frame 200 includes the frame member 300 and the upper plate 400, and the first and second heat dissipation members 500a and 500b may be in contact with the upper plate 400. In addition, the first heat dissipation member 500a and the second heat dissipation member 500b may be in contact with the frame member 300. More specifically, the first heat dissipation member 500a may be in contact with the bottom 300a of the frame member 300, and the second heat dissipation member 500b may be in contact with the frame member 300. The bottom 300a and the side surface 300b are in contact.

At this time, a plurality of first heat dissipation members 500a may be formed to be inserted between the battery cells 110, and at least one second heat dissipation member 500b may be formed inside the battery module 100 of the present disclosure so as to be inserted between the battery cells 110. between the module frame 200 and the outermost battery cell 110 of the battery cell stack 120 . Furthermore, in the case of the outermost battery cell 110 , since one is formed on each side surface of the battery cell stack 120 , the second heat dissipation member 500 may also be formed corresponding to the outermost battery cell 110 . number.

In addition, in the battery module 100 according to the present embodiment, the thermally conductive resin layer 310 is located between the lower surface of the battery cell stack 120 and the bottom 300a of the frame member 300, so that the first heat dissipation member 500a and the second heat dissipation member 500b can be connected with The thermally conductive resin layer 310 is in contact.

In particular, the second heat dissipation member 500b may be formed so as to abut one side surface portion 300b of the frame member 300. The second heat dissipation member 500b is formed to have an area adjacent to the side surface portion 300b so that an additional heat transfer path is formed through the area. Therefore, the cooling performance of the battery module according to the present embodiment can be further improved.

In addition, as described above, the first heat dissipation member 500 a and the second heat dissipation member 500 b are formed in contact with the upper plate 400 and the frame member 300 so that the first heat dissipation member 500 a and the second heat dissipation member 500 b may be formed larger than the battery cell 110 size. More specifically, the first heat dissipation member 500 a and the second heat dissipation member 500 b may be formed to have a longer vertical length than the battery cell 110 . In addition, it may be formed to have a longer horizontal length than the battery cell 110 . At this time, the horizontal length and the vertical length of the battery cell 110 may indicate the length in the x-axis direction and the length in the z-axis direction of the battery cell 110 of FIG. 4 .

In addition, the first heat dissipation member 500a and the second heat dissipation member 500b can be in contact with various components included in the battery module 100 as described above, whereby the first heat dissipation member 500a and the second heat dissipation member 500b can be in contact with each other. contact with various configurations and may also include proximity to various configurations.

From the perspective of the cooling path of a conventional battery module, the heat generated by the battery cells is transferred through the lower surface of the battery cell stack, the thermally conductive resin layer and the bottom of the module frame, and is transferred to the outside of the battery module, thereby cooling only through a single path. , which makes it difficult to exhibit efficient cooling performance.

Therefore, in the present disclosure, the first heat dissipation member 500a and the second heat dissipation member 500b are formed as described above, and the first heat dissipation member 500a and the second heat dissipation member 500b are formed so as to connect with the upper plate 400, the bottom 300a, the side surface portion 300b In contact with the thermally conductive resin layer 310, various cooling paths are designed compared with those of conventional battery modules. Furthermore, rapid cooling via multiple cooling paths can be achieved by simplifying each path compared to conventional cooling paths. In particular, the first heat dissipation member 500 a and the second heat dissipation member 500 b are in direct contact with the upper plate 400 so that the heat transferred from the battery cells 110 can be quickly discharged to the outside of the battery module 100 .

The heat dissipation member 500 according to the present embodiment can be variously selected within the range that satisfies the heat dissipation performance and does not cause any problems in the assembly of the module frame 200 , the battery cells 110 and the thermally conductive resin layer 310 . Therefore, the heat dissipation member 500 may be selected from a heat dissipation pad, a heat dissipation pin, a heat dissipation fin, a heat dissipation resin, a heat dissipation adhesive, and the like.

At this time, referring to FIG. 7 , specifically, the heat dissipation member 500 according to the present embodiment may be in a tubular shape having an empty space formed parallel to the side surface portion 300 b of the frame member 300 . In particular, the empty space may be a space commonly referred to as an air gap.

More specifically, the heat dissipation member 500 according to the present embodiment has a hexahedral structure, which may be a structure in which an empty space is formed in the hexahedral structure so as to be parallel to the side surface portion 300b of the frame member 300 . At this time, the hexahedral structure of the heat dissipation member 500 may be a cuboid structure, which may be a structure in which at least one surface of the cuboid structure is open, but is not limited thereto.

At this time, the air gap structure is not limited to its shape, but may be formed in the same shape as the heat dissipation member 500 . However, it is formed inside the heat dissipation member 500 and, therefore, may be formed smaller in size and volume than the heat dissipation member 500 .

The battery module 100 according to this embodiment discharges heat generated in a single battery cell 110 through an air gap structure, while preventing heat transfer between battery cells 110 . In particular, when thermal runaway occurs, separation between the battery cells 110 can be ensured, thereby delaying the thermal runaway and ensuring the stability of the module.

Next, a heat dissipation member according to another embodiment of the present disclosure will be described with reference to FIG. 8 . Since the heat dissipation member of this embodiment is a modification of the above-mentioned heat dissipation member, only parts different from the above-mentioned heat dissipation member will be described.

8 is a perspective view showing a heat dissipation member according to another embodiment of the present disclosure.

Referring to FIG. 8 , the heat dissipation member 500 according to the present embodiment may have a hexahedral structure with a hollow interior. More specifically, the hexahedral structure may be a rectangular hexahedral structure, which may be a structure in which, in the hexahedral structure, the interior is empty, and gas may exist in the empty space.

Due to the above structure, the heat dissipation member 500 according to the present embodiment can transfer the heat generated by the single battery cell 110 to the module frame 200 and the thermally conductive resin layer 310 so that it can be quickly discharged to the outside of the battery module 100 . In addition, the gas formed in the internal empty space may function to prevent heat transfer between the battery cells 110 .

Next, a heat dissipation member according to another embodiment of the present disclosure will be described with reference to FIG. 9 . Since the heat dissipation member of this embodiment is also a modification of the above-described heat dissipation member, only different parts will be described.

9 is a perspective view showing a heat dissipation member according to another embodiment of the present disclosure.

Referring to FIG. 9 , the heat dissipation member 500 according to the present embodiment may have a hexahedral structure, the upper and lower parts thereof may be open, and a part of the side surface part thereof may be open.

More specifically, the hexahedral structure may be a cuboid structure, but is not limited thereto.

In addition, the heat dissipation member 500 according to the present embodiment may be configured such that a part of the side surface portion is open, and specifically, the open side surface portion may be two side surface portions formed parallel to the stacking direction of the battery cells 110 . In other words, it may be the side surface portion formed in the upper and lower surfaces of the battery cell stack 120 of FIG. 4 . At this time, a part or all of the side surface portions formed in parallel to the stacking direction of the battery cells 110 may be open, and an empty space for connecting the opened side surface portions may be formed. Therefore, an air gap may be formed in the heat dissipation member 500 according to the present embodiment.

As described above, the air gap dissipates heat generated in the individual battery cells 110 while preventing heat transfer between the battery cells 110 . In particular, when a thermal runaway phenomenon occurs, separation between the battery cells 110 can be ensured, thereby delaying the thermal runaway phenomenon and ensuring the stability of the module.

A battery module according to an embodiment of the present invention includes a heat dissipation member, so that cooling performance can be improved. In particular, the shapes of the first heat dissipation member and the second heat dissipation member may be selected from the shapes of the heat dissipation members disclosed in various embodiments of the present disclosure. Furthermore, the first heat dissipation member and the second heat dissipation member may each be formed in the same shape, or may be formed in different shapes.

The battery module according to various embodiments of the present disclosure is formed with a heat dissipation member, and the heat dissipation member is in contact with the module frame, particularly the upper plate and the frame member, thereby forming multiple cooling paths compared to conventional battery modules. In addition, rapid cooling and heat transfer effects are achieved through a simplified cooling path compared to conventional cooling paths.

Next, a battery pack according to yet another embodiment of the present disclosure will be described with reference to FIG. 10 .

Figure 10 is a cross-sectional view of a battery pack according to yet another embodiment of the present disclosure.

Referring to FIG. 10 , a battery pack 1000 according to an embodiment of the present disclosure includes the above-mentioned battery module, a heat transfer member 600 located under the bottom 300 a of the frame member 300 , and a heat sink 700 located under the heat transfer member 600 . Therefore, the heat transferred to the bottom 300a of the battery module 100 may be transferred to the outside of the battery pack via the heat transfer member 600 and the heat sink 700.

In addition, the battery pack of the present disclosure may have a structure in which one or more battery modules according to the present embodiment are gathered together with a battery management system (BMS) and cooling device that control and manage the temperature, voltage, etc. of the battery Assemble.

Battery packs can be used in a variety of devices. This device can be applied to vehicle devices such as electric bicycles, electric vehicles, or hybrid vehicles, but the present disclosure is not limited thereto, and can be applied to various devices that can use battery modules, which also fall within the scope of the present disclosure.

Although the preferred embodiments of the present disclosure have been described in detail above, the scope of the present disclosure is not limited thereto, and those skilled in the art can make various modifications without departing from the spirit and scope of the principles of the present invention described in the appended claims. Many other modifications and embodiments are contemplated below.

[Explanation of reference signs]

100: battery module

110: Battery cell

200: Module framework

300: Frame components

400: On the board

500: Heat dissipation component

500a: first heat dissipation component

500b: Second heat dissipation component

600: Heat transfer components

700: heat sink

Claims (12)

1. A battery module, the battery module comprising:

a cell stack in which a plurality of cells are stacked; and

a module frame accommodating the battery cell stack,

the battery module includes:

a first heat dissipation member interposed between the battery cells; and

and a second heat dissipation member interposed between the module frame and the outermost battery cell of the battery cell stack.

2. The battery module of claim 1, wherein the battery module comprises a plurality of cells,

the module frame includes: a frame member for covering a lower portion and both side surfaces of the battery cell stack; and an upper plate for covering an upper portion of the battery cell stack, and

the first heat dissipation member and the second heat dissipation member are in contact with the frame member.

3. The battery module of claim 2, wherein the battery module comprises a plurality of battery cells,

the frame member includes: a side surface part for covering a side surface of the battery cell stack; and a bottom for covering the lower surface of the battery cell stack,

the first heat dissipation member is in contact with the bottom portion, and

the second heat dissipation member is in contact with the bottom portion and the side surface portion.

4. The battery module of claim 3, wherein the battery module comprises a plurality of battery cells,

the first heat dissipation member and the second heat dissipation member are in contact with the upper plate.

5. The battery module of claim 3, wherein the battery module comprises a plurality of battery cells,

the battery module further includes a heat conductive resin layer between the lower surface of the battery cell stack and the bottom of the frame member, and

the first heat dissipation member and the second heat dissipation member are in contact with the heat conductive resin layer.

6. The battery module of claim 3, wherein the battery module comprises a plurality of battery cells,

the first heat dissipation member and the second heat dissipation member are tubular with an empty space formed parallel to the side surface portion of the frame member.

7. The battery module of claim 1, wherein the battery module comprises a plurality of cells,

the first heat dissipation member and the second heat dissipation member are formed in a hexahedral structure with an empty inside.

8. The battery module of claim 1, wherein the battery module comprises a plurality of cells,

the first heat dissipation member and the second heat dissipation member are formed in a hexahedral structure with upper and lower portions open and a portion of a side surface portion open.

9. The battery module of claim 1, wherein the battery module comprises a plurality of cells,

the first heat dissipation member is formed in plurality so as to be interposed between the battery cells.

10. The battery module of claim 3, wherein the battery module comprises a plurality of battery cells,

the second heat dissipation member is formed to abut against one side surface portion of the frame member.

11. The battery module of claim 1, wherein the battery module comprises a plurality of cells,

the first heat dissipation member and the second heat dissipation member are formed to have a vertical length longer than that of the battery cell.

12. A battery pack, comprising:

the battery module of claim 1;

a heat transfer member located under the bottom of the battery module; and

a heat sink located below the heat transfer member.