CN220121952U

CN220121952U - Battery module and battery pack including the battery module

Info

Publication number: CN220121952U
Application number: CN202290000254.1U
Authority: CN
Inventors: 张诚桓; 成准烨; 朴源暻
Original assignee: LG Energy Solution Ltd
Current assignee: LG Energy Solution Ltd
Priority date: 2021-04-20
Filing date: 2022-03-17
Publication date: 2023-12-01
Anticipated expiration: 2032-03-17
Also published as: WO2022225191A1; KR20220144715A; DE212022000108U1

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 same

Technical Field

Cross Reference to Related Applications

The present utility model claims the benefit of korean patent application No. 10-2021-0051383 filed in the korean intellectual property office on day 4 and 20 of 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 same, and more particularly, to a battery module having improved cooling performance and a battery pack including the same.

Background

In modern society, with the daily use of portable devices such as mobile phones, notebook computers, video cameras and digital cameras, development of technologies in the fields related to the above-mentioned mobile devices has been active. In addition, chargeable/dischargeable secondary batteries are used as power sources for Electric Vehicles (EVs), hybrid vehicles (HEVs), plug-in hybrid vehicles (P-HEVs), and the like, in an attempt to solve air pollution and the like caused by existing gasoline vehicles using fossil fuels. Therefore, there is an increasing demand for development of secondary batteries.

The secondary batteries commercialized at present include nickel-cadmium batteries, nickel-hydrogen batteries, nickel-zinc batteries, and lithium secondary batteries. Among them, lithium secondary batteries are attracting attention because they have advantages such as showing little memory effect compared to nickel-based secondary batteries, being freely charged and discharged, and having a very low self-discharge rate and high energy density.

Such lithium secondary batteries mainly use lithium-based oxides and carbonaceous materials as a positive electrode active material and a negative electrode active material, respectively. The lithium secondary battery includes: an electrode assembly in which positive and negative electrode plates coated with a positive and negative electrode active material, respectively, are arranged with a separator interposed therebetween; and a battery case sealing and accommodating the electrode assembly together with the electrolyte solution.

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

In the case of a secondary battery for a small-sized device, two to three battery cells are arranged, but in the case of a secondary battery for a middle-or large-sized device such as an automobile, a battery module in which a large number of battery cells are electrically connected is used. In such a battery module, a large number of battery cells are connected in series or parallel with each other to form a battery cell assembly, 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 BMS (battery management system) and a cooling system, to form a battery pack.

When the temperature of the secondary battery increases to be higher than an appropriate temperature, the performance of the secondary battery may deteriorate, and in the worst case, there is also a risk of explosion or ignition. 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 the large number of battery cells in a narrow space, so that the temperature can rise more quickly 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 charge and discharge. When the heat dissipation of the battery cell is not properly performed, the degradation of the battery cell is accelerated, the life is shortened, and the possibility of explosion or ignition increases.

In addition, in the case of a middle-or large-sized battery module included in a vehicle battery pack, it is often exposed to direct sunlight, and may be placed under high temperature conditions, such as summer or desert regions.

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

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

Referring to fig. 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 described above, since the battery module 10 includes the plurality of battery cells 11, it generates a large amount of heat during the charge and discharge. As a cooling means, the battery module 10 may include a heat conductive resin layer 40 between the battery cell stack 20 and the bottom 31 of the module frame 30. Further, when the battery module 10 is mounted on a battery pack frame to form a battery pack, the heat transfer member 50 and the heat sink 60 may be sequentially located under the battery module 10.

The heat generated by the battery cells 11 sequentially passes through the heat 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.

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

Therefore, as other demands, such as an increase in capacity relative to the battery module, are continuously increasing, it is actually necessary to develop a battery module capable of satisfying these various demands while improving the cooling performance of the battery cells.

Disclosure of Invention

Technical problem

It is an object of the present disclosure to provide a battery module having improved cooling performance and a battery pack including the same.

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

Technical proposal

According to an embodiment of the present disclosure, there is provided a battery module 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 including: a first heat dissipation member interposed between the battery cells; 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 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 may be in contact with the frame member.

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

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 heat conductive resin layer between the lower surface of the battery cell stack and the bottom of the frame member, and the first and second heat dissipation members may be in contact with the heat 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 and second heat dissipation members according to one embodiment of the present disclosure may be formed in a hexahedral structure with an empty inside.

The first and second heat dissipation members according to one embodiment of the present disclosure may be formed in a hexahedral structure with upper and lower portions open and a portion of the side surface portion open.

The first heat dissipation member may be formed in plurality in such a manner as to be interposed between the battery cells.

The second heat dissipation member may be formed to abut 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 that of the battery cell.

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

Advantageous effects

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

Further, the heat dissipation member includes an air gap, so that heat generated from the battery cells can be effectively transferred, and at the same time, an effect of preventing heat transfer between the battery cells is achieved.

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

Drawings

Fig. 1 is a perspective view illustrating a conventional battery module;

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

fig. 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 illustrating battery cells included in the battery module of fig. 4;

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

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

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

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

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

Detailed Description

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 present disclosure may be modified in various different 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 like drawing descriptions denote like elements throughout the specification.

In addition, in the drawings, the sizes and thicknesses of the respective elements are arbitrarily shown for convenience of description, and the present disclosure is not necessarily limited to those shown in the drawings. In the drawings, the thickness of layers, regions, etc. are exaggerated for clarity. In the drawings, the thickness 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, it means that there are no other intervening elements present. Further, the word "upper" or "above" means disposed above or below the reference portion, and does not necessarily mean disposed at the upper end of the reference portion toward the opposite direction of gravity.

In addition, throughout the specification, when a portion is referred to as "comprising" or "including" a particular component, it means that the portion can also include other components without excluding other components, unless otherwise specified.

In addition, throughout the specification, when referred to as a "plane", it means when the target portion is viewed from the upper side, and when referred to as a "cross section", it means when the target portion is viewed from the cross section side cut vertically.

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

Fig. 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 illustrating battery cells included in the battery module of fig. 4. Fig. 6 is a cross-sectional view showing a part of a cross section taken along a cutting line B-B' of fig. 3.

Referring to fig. 3 to 6, a battery cell 100 according to the present embodiment includes: a cell stack 120 formed by stacking a plurality of cells 110; a module frame 200 for accommodating the battery cell stack 120; and a heat dissipation member 500 interposed between the battery cells 110 and/or between the module frame 200 and the outermost battery cells 110 of the battery cell stack 120. More specifically, the first heat dissipation member 500a may be interposed between the battery cells, and the second heat dissipation member 500b is interposed between the module frame 200 and the outermost battery cells 110 of the battery cell stack 120. Hereinafter, in addition to the difference between the first heat dissipation member 500a and the second heat dissipation member 500b, for convenience of explanation, 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 in a rectangular sheet-like 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 protrude from one end 114a and the other end 114b of the battery cell body 113, respectively. That is, the battery cell 110 includes electrode leads 111 and 112 protruding in opposite directions to each other. More specifically, the electrode leads 111 and 112 are connected to an electrode assembly (not shown), and protrude from the electrode assembly (not shown) to the outside of the battery cell 110.

Meanwhile, the battery cell 110 may be manufactured by coupling both end portions 114a and 114b of the battery cell case 114 and one side portion 114c connecting them in a state in which an electrode assembly (not shown) is received in the battery cell case 114. 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 may be constituted by the connection part 115. The battery cell casing 114 may be composed of a laminate sheet including a resin layer and a metal layer.

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

The battery cells 110 may be configured in plurality, 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. Thus, the electrode leads 111 and 112 may protrude toward the x-axis direction and the-x-axis direction, respectively.

Meanwhile, when the charge and discharge of the battery cell 110 are repeatedly performed, 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 116 instead of the center portion of the battery cell body 113, more heat is generated in response to charge and discharge.

The module frame 200 for receiving the battery cell stack 120 may include: a frame member 300 for covering the lower part and both side surfaces of the battery cell stack 120; and an upper plate 400 for covering the 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 end portions of the bottom 300 a. The bottom 300a may cover the lower surface of the battery cell stack 120, and the side surface parts 300b may cover both side surfaces of the battery cell stack 120. Here, the lower surface of the battery cell stack 120 refers to a surface in the-z axis direction, and both side surfaces of the battery cell stack 120 refer to surfaces in the y axis and-y axis directions. However, these are aspects mentioned for convenience of explanation, and may vary according to the position of the target object or the position of the observer.

The upper plate 400 may be formed in a single plate-like structure that wraps 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 in a state in which the corresponding corners are in contact with each other, thereby forming a structure to vertically and horizontally cover the battery cell stack 120. The battery cell stack 120 may be physically protected by the upper plate 400 and the frame member 300. For this, 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 drawings, the module frame 200 according to the modification may be a single frame in the form of a metal plate in which an upper surface, a lower surface, and both side surfaces are integrated. That is, this may be a structure in which the upper surface, the lower surface, and the two side surfaces are integrated by extrusion molding, 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 that cover the front and rear surfaces of the battery cell stack 120, respectively. Here, the front surface of the cell stack 120 refers to the surface in the x-axis direction, and the rear surface of the cell stack 120 refers to the surface in the-x-axis direction.

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

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

In addition, the battery module 100 according to the present embodiment further includes a heat conductive resin layer 310 between the lower surface of the battery cell stack 120 and the bottom 300a of the frame member 300, and the heat conductive resin layer 310 may function to transfer heat generated in the battery cells 110 to the bottom of the battery module 100 and fix 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 fig. 6 and 7.

Fig. 7 is a perspective view illustrating a heat dissipating member according to one embodiment of the present disclosure.

Referring back to fig. 6, the heat dissipation member 500 according to the present embodiment may include: a first heat dissipation member 500a interposed between the battery cells 110; and a second heat dissipation member 500b interposed between the module frame 200 and the outermost battery cells 110 of the battery cell stack 120. 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. Further, the first and second heat dissipation members 500a and 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 bottom 300a and the side surface portion 300b of the frame member 300.

At this time, the first heat dissipation member 500a may be formed in plurality in such a manner as to be interposed 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 interposed between the module frame 200 and the outermost battery cells 110 of the battery cell stack 120. Further, in the case of the outermost battery cells 110, since one is formed on each side surface of the battery cell stack 120, the second heat dissipation members 500 may also be formed to correspond to the number of the outermost battery cells 110.

In addition, in the battery module 100 according to the present embodiment, the heat 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 such that the first and second heat dissipation members 500a and 500b may be in contact with the heat conductive resin layer 310.

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

In addition, as described above, the first and second heat dissipation members 500a and 500b are formed to be in contact with the upper plate 400 and the frame member 300, such that the first and second heat dissipation members 500a and 500b may be formed to be larger than the size of the battery cell 110. More specifically, the first and second heat dissipation members 500a and 500b 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 and second heat dissipation members 500a and 500b are capable of contacting various components included in the battery module 100 as described above, whereby the first and second heat dissipation members 500a and 500b may contact the above-described various configurations in contact with each other, and may also include proximity to various configurations.

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

Accordingly, in the present disclosure, the first and second heat dissipation members 500a and 500b are formed as described above, and the first and second heat dissipation members 500a and 500b are formed so as to be in contact with the upper plate 400, the bottom 300a, the side surface part 300b, and the heat conductive resin layer 310, whereby various cooling paths are designed as compared with those of the conventional battery module. Further, by simplifying the respective paths as compared with the conventional cooling paths, rapid cooling via a plurality of cooling paths can be achieved. In particular, the first and second heat dissipation members 500a and 500b are in direct contact with the upper plate 400, so that heat transferred from the battery cells 110 can be rapidly discharged to the outside of the battery module 100.

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

At this time, referring to fig. 7, in particular, the heat dissipation member 500 according to the present embodiment may have a tubular shape having an empty space formed parallel to the side surface portion 300b 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 rectangular parallelepiped structure, which may be a structure in which at least one surface of the rectangular parallelepiped 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 thus, may be formed smaller than the size and volume of the heat dissipation member 500.

The battery module 100 according to the present embodiment discharges heat generated in the individual battery cells 110 through the air gap structure, while heat transfer between the battery cells 110 can be prevented. In particular, when the thermal runaway phenomenon occurs, it is possible to ensure separation between the battery cells 110, thereby enabling to delay the thermal runaway phenomenon and to ensure 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 radiating member of the present embodiment is a modification of the above-described heat radiating member, only a portion different from the above-described heat radiating member will be described.

Fig. 8 is a perspective view illustrating a heat dissipating 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 an empty inside. More specifically, the hexahedral structure may be a rectangular hexahedral structure, which may be a structure in which the inside is empty and a gas may exist in the empty space.

With the above-described structure, the heat dissipation member 500 according to the present embodiment can transfer heat generated by the single battery cell 110 to the module frame 200 and the heat conductive resin layer 310, so that it can be rapidly discharged to the outside of the battery module 100. In addition, the gas formed in the empty space inside 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 radiating member of the present embodiment is also a modification of the above-described heat radiating member, only different portions will be described.

Fig. 9 is a perspective view illustrating a heat dissipating 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, upper and lower portions of which are open, and a portion of a side surface portion thereof may be open.

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

In addition, the heat dissipation member 500 according to the present embodiment may be configured such that a portion of the side surface portions is open, and in particular, the open side surface portions may be two side surface portions formed parallel to the stacking direction of the battery cells 110. In other words, it may be side surface portions 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 parts formed in parallel to the stacking direction of the battery cells 110 may be open, and an empty space for connecting the open side surface parts 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 discharges heat generated in the single battery cells 110, and at the same time, heat transfer between the battery cells 110 can be prevented. In particular, when the thermal runaway phenomenon occurs, it is possible to ensure separation between the battery cells 110, thereby delaying the thermal runaway phenomenon and ensuring the stability of the module.

The battery module according to one embodiment of the present utility model includes a heat dissipation member, so that cooling performance can be improved. In particular, the shape 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 the various embodiments of the present disclosure. Further, 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 to have 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 a plurality of cooling paths, as compared to the conventional battery module. In addition, rapid cooling and heat transfer effects are achieved by the simplified cooling path compared to conventional cooling paths.

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

Referring to fig. 10, a battery pack 1000 according to an embodiment of the present disclosure includes: the above-described battery module, the heat transfer member 600 under the bottom 300a of the frame member 300, and the heat sink 700 under the heat transfer member 600. Accordingly, 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 and assembled together with a Battery Management System (BMS) that controls and manages the temperature, voltage, etc. of the battery and a cooling device.

The battery pack may be applied to various devices. Such a device may be applied to a vehicle device such as an electric bicycle, an electric vehicle, or a hybrid vehicle, but the present disclosure is not limited thereto, and may be applied to various devices that may use a battery module, which also falls within the scope of the present disclosure.

Although preferred embodiments of the present disclosure have been described in detail above, the scope of the present disclosure is not limited thereto and many other modifications and embodiments may be devised by those skilled in the art without departing from the spirit and scope of the principles of the present utility model as described in the appended claims.

[ description of reference numerals ]

100: battery module

110: battery cell

200: module frame

300: frame member

400: upper plate

500: heat radiation member

500a: first heat dissipation component

500b: second heat dissipation component

600: heat transfer member

700: heat sink

Claims

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.