阅读说明：本技术 电池模块 (Battery module ) 是由 安旋谟 全海龙 崔永善 于 2020-10-30 设计创作，主要内容包括：本发明涉及一种电池模块,根据本发明的一个实施例的电池模块可以包括：多个二次电池单元；电池单元容纳部,所述二次电池单元以平放的状态安装在电池单元容纳部中；盖体部,与所述电池单元容纳部结合,以覆盖用于容纳所述二次电池单元的所述电池单元容纳部的开口部；以及散热器部,设置在所述电池单元容纳部和所述盖体部中,并且与所述二次电池单元的底部和顶部接触,以将从所述二次电池单元传递的热量排放到外部。(The present invention relates to a battery module, and a battery module according to an embodiment of the present invention may include: a plurality of secondary battery cells; a battery cell housing portion in which the secondary battery cell is mounted in a laid state; a lid portion coupled with the battery cell receiving portion to cover an opening portion of the battery cell receiving portion for receiving the secondary battery cell; and a heat sink part disposed in the battery cell receiving part and the cover part and contacting bottom and top of the secondary battery cell to discharge heat transferred from the secondary battery cell to the outside.)

1. A battery module, comprising:

a plurality of secondary battery cells;

a battery cell housing portion in which the secondary battery cell is mounted in a laid state;

a lid portion coupled to the battery cell accommodating portion to cover an opening portion of the battery cell accommodating portion in which the secondary battery cell is accommodated; and

a heat sink part disposed in the battery cell receiving part and the cover part and contacting bottom and top of the secondary battery cell to discharge heat transferred from the secondary battery cell to the outside.

2. The battery module of claim 1,

the battery cell accommodating portion includes:

a lower plate member on which the secondary battery cell is mounted and which is in contact with a side surface of the secondary battery cell;

an upper plate member provided to face the lower plate member; and

and an intermediate plate member coupled to connect the lower plate member and the upper plate member and contacting a bottom of the secondary battery cell.

3. The battery module of claim 2,

the heat sink portion includes a central heat sink that is provided in the middle plate part and discharges heat transferred from the bottom of the secondary battery cell to the outside.

4. The battery module of claim 3,

the heat sink part includes a side heat sink that is disposed in a side cover part of the battery cell receiving part opposite to the middle plate part and discharges heat transferred from the top of the secondary battery cell to the outside.

5. The battery module of claim 4,

the heat sink portion includes a cooling fin member that is disposed between the secondary battery cells adjacent to each other, and has one end portion that extends to be adjacent to the intermediate plate member and the other end portion that extends to be contiguous to the side cover member.

6. The battery module according to claim 5,

the other end of the cooling fin member is provided with a contact plate for enlarging a contact area with the side cover member.

7. The battery module of claim 5,

the heat sink portion includes heat conductive members disposed between the middle plate member, in which the central heat sink is disposed, and the bottom of the secondary battery cell and between the side cover member, in which the side heat sinks are disposed, and the top of the secondary battery cell, thereby forming heat moving paths.

8. The battery module according to claim 7,

the heat conductive member is formed at a remaining region of the top of the secondary battery cell adjacent to a region where the sealing part of the secondary battery cell is folded, and the sealing part of the secondary battery cell is protrudingly formed at the top of the secondary battery cell.

9. The battery module according to claim 7,

the portion of the heat-conducting member that contacts the bottom of the secondary battery cell is formed in a shape corresponding to the shape of the bottom of the secondary battery cell, thereby supporting the secondary battery cell.

10. The battery module according to claim 7,

the heat conductive member is formed of at least one material of silicone, polyurethane, and epoxy resin to adhere the secondary battery cell.

11. The battery module according to claim 4,

the side heat sink extends to a support piece of the side cover member, which is formed to protrude toward the secondary battery cell to support each of the plurality of secondary battery cells accommodated in the battery cell accommodating portion in a stacked manner.

12. The battery module according to claim 11,

the support sheet is formed to correspond to a remaining region of a top portion of the secondary battery cell adjacent to a region where a sealing portion of the secondary battery cell is folded, and the sealing portion of the secondary battery cell is formed to protrude from the top portion of the secondary battery cell.

13. The battery module according to claim 1,

in the battery cell housing part, pouch-type secondary battery cells that seal three faces and house an electrode assembly are stacked.

Technical Field

The present invention relates to a battery module.

Background

As technical development and demand for mobile devices, electric vehicles, and the like increase, demand for secondary battery cells as energy sources has sharply increased. The interconversion between chemical energy and electrical energy in the secondary battery cell is reversible, and therefore, is a battery that can be repeatedly charged and discharged.

Such a secondary battery cell includes electrode assemblies such as an anode, a cathode, a separator, and an electrolyte as main components of the secondary battery, and a cell body member of a multi-layered exterior material (coated Film Case) that protects the electrode assemblies.

However, such an electrode assembly may generate heat during charge and discharge, and the temperature rise caused by the heat may degrade the performance of the secondary battery cell.

Therefore, in the related art, it is proposed to cool the secondary battery cell by a case member that houses the secondary battery cell and a heat sink that is in contact therewith.

However, the heat sink is disposed outside the case member, and thus there is a limitation in that cooling performance is reduced.

On the other hand, in the related art, the secondary battery cell is erected such that the bottom thereof contacts the lower plate member of the case member, and thus there is a limitation in that it is difficult to modify the design of the case member in the height direction.

In addition, in order to increase the number of secondary battery cells to increase the energy density, it is necessary to expand the case member in the width direction, which makes it difficult to effectively use the space, and there is a limitation in that an additional structure is required when the rigidity is increased by the case member.

Therefore, in order to improve the above problems and limitations, research into battery modules is required.

Documents of the prior art

[ patent document ] JP 2018-

Disclosure of Invention

Technical problem to be solved

The present invention aims to provide a battery module capable of improving heat dissipation performance through a heat sink.

On the other hand, an object of the present invention is to provide a battery module capable of securing a degree of freedom in design change in the height direction when accommodating secondary battery cells.

(II) technical scheme

The battery module according to one embodiment of the present invention may include: a plurality of secondary battery cells; a battery cell housing portion in which the secondary battery cell is mounted in a laid state; a cover portion coupled with the battery cell receiving portion to cover an opening portion of the battery cell receiving portion for receiving the secondary battery cell; and a heat sink part disposed in the battery cell receiving part and the cover part and contacting bottom and top of the secondary battery cell to discharge heat transferred from the secondary battery cell to the outside.

Wherein the battery cell receiving part of the battery module according to one embodiment of the present invention may include: a lower plate member on which the secondary battery cell is mounted and which is in contact with a side surface of the secondary battery cell; an upper plate member provided to face the lower plate member; and an intermediate plate member coupled to connect the lower plate member and the upper plate member, and contacting a bottom of the secondary battery cell.

Specifically, the heat sink part of the battery module according to one embodiment of the present invention may include a central heat sink that is disposed in the middle plate part and discharges heat transferred from the bottom of the secondary battery cell to the outside.

Also, the heat sink part of the battery module according to one embodiment of the present invention may include a side heat sink that is disposed in the side cover part of the battery cell receiving part opposite to the middle plate part and discharges heat transferred from the top of the secondary battery cell to the outside.

Further, the heat sink portion of the battery module according to one embodiment of the present invention may include a cooling fin member that is disposed between the secondary battery cells adjacent to each other, and has one end portion extended to be adjacent to the middle plate member and the other end portion extended to be contiguous to the side cover member.

Wherein the other end of the cooling fin member of the battery module according to one embodiment of the present invention may be provided with a contact plate for enlarging a contact area with the side cover member.

Also, the heat sink part of the battery module according to one embodiment of the present invention may include heat conductive members disposed between the middle plate part, in which the central heat sink is disposed, and the bottom of the secondary battery cell and between the side cover part, in which the side heat sinks are disposed, and the top of the secondary battery cell, thereby forming a heat moving path.

Wherein the heat conductive member of the battery module according to one embodiment of the present invention may be formed at the remaining region of the top of the secondary battery cell adjacent to the region where the sealing part of the secondary battery cell is folded, the sealing part of the secondary battery cell being protrudingly formed at the top of the secondary battery cell.

Also, a portion of the heat conductive member of the battery module according to one embodiment of the present invention, which is in contact with the bottom of the secondary battery cell, may be formed in a shape corresponding to the shape of the bottom of the secondary battery cell, thereby supporting the secondary battery cell.

Also, the heat conductive member of the battery module according to one embodiment of the present invention may be formed of at least one material of silicone, urethane, and epoxy materials to adhere the secondary battery cells.

Also, the side heat sink of the battery module according to one embodiment of the present invention may extend to support pieces of the side cover member that are protrudingly formed toward the secondary battery cells to support each of the plurality of secondary battery cells received in the battery cell receiving part in a stacked manner.

Wherein the support sheet of the battery module according to one embodiment of the present invention may be formed in a shape corresponding to the remaining region of the top of the secondary battery cell adjacent to the region where the sealing part of the secondary battery cell is folded, the sealing part of the secondary battery cell being protrudingly formed at the top of the secondary battery cell.

Also, in the battery cell receiving part of the battery module according to one embodiment of the present invention, pouch-type secondary battery cells, which are provided to seal three sides and receive an electrode assembly, may be stacked.

(III) advantageous effects

The battery module of the present invention has an advantage in that the heat dissipation performance can be improved by the heat sink portion.

On the other hand, the battery module according to the present invention has an advantage that the degree of freedom in design change in the height direction can be secured when the secondary battery cell is housed. This has the effect of improving the space utilization when the secondary battery cell is provided.

The battery module of the present invention has an advantage in that the rigidity can be enhanced by its own structure without additionally providing other structures. This has the effect of reducing the overall weight while ensuring durability.

However, various advantageous advantages and effects of the present invention are not limited to the above, and will be more easily understood in the course of describing a specific embodiment of the present invention.

Drawings

Fig. 1 is a front view showing a battery module of the present invention.

Fig. 2 is an exploded perspective view illustrating a battery module of the present invention.

Fig. 3 and 4 are front views showing only a heat sink part in the battery module of the present invention.

Fig. 5 is a front view illustrating an embodiment of the battery module of the present invention including a support sheet.

Reference signs

10: battery cell housing portion 11: lower plate component

12: upper plate member 13: intermediate plate member

20: lid portion 21: end cover member

22: side cover body member 30: radiator part

31: central heat sink 32: side radiator

33: cooling fin member 34: heat conducting member

Detailed Description

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. However, the embodiments of the present invention may be changed into various different forms, and the scope of the present invention is not limited to the embodiments described below. Also, embodiments of the present invention are provided to more fully describe the present invention to those of ordinary skill in the art. The shapes and sizes of components, etc., may be exaggerated in the drawings for clarity of description.

In addition, unless the context clearly dictates otherwise, expressions in the singular form in this specification include the plural form, and the same or similar reference numerals denote the same components or corresponding components throughout the specification.

The present invention relates to a battery module, which can improve the heat radiation performance of a radiator part 30, thereby being capable of providing more secondary battery cells C to improve the energy density in the battery module and reducing the occurrence of fire caused by the heat generated by the secondary battery cells C.

On the other hand, the battery module according to the present invention can ensure the freedom of design change in the height direction when accommodating the secondary battery cells C, thereby improving the space utilization rate when installing the secondary battery cells C.

In addition, the battery module according to the present invention can enhance the rigidity by its own structure without additionally providing another structure, thereby reducing the entire weight and securing the durability.

Wherein the secondary battery cell C may include an electrode assembly and a battery cell main body member covering the electrode assembly.

The electrode assembly actually contains an electrolyte and is used together with it being accommodated in the battery cell main body part. The electrolyte may include LiPF in an organic solvent such as Ethylene Carbonate (EC), Propylene Carbonate (PC), diethyl carbonate (DEC), Ethyl Methyl Carbonate (EMC), dimethyl carbonate (DMC), or the like₆、LiBF₄And the like lithium salts. Further, the electrolyte may be liquid, solid or gel-like.

The battery cell main body member is configured to house the electrolyte while protecting the electrode assembly, and may be formed of a pouch-shaped member or a can-shaped member, for example. The pouch-shaped member is in a form of sealing and accommodating the electrode assembly on three sides, and is a member configured to fold and join the three sides, that is, mainly an upper surface portion and two side surface portions excluding one side of a lower surface portion, in a state of accommodating the electrode assembly inside to achieve sealing. The can-shaped member is configured to seal and accommodate the electrode assembly on one surface, and is configured to be folded and joined to one surface in a state where the electrode assembly is accommodated inside, that is, mainly an upper surface portion excluding three surfaces of a lower surface portion and two side surface portions, to achieve sealing.

However, such pouch type secondary battery cell C and can type secondary battery cell C are just one example of the secondary battery cell C accommodated in the battery module of the present invention, and the secondary battery cell C accommodated in the battery module of the present invention is not limited to this type.

Specifically, the description is made below with reference to fig. 1, which is a front view showing a battery module of the present invention. Fig. 2 is an exploded perspective view illustrating a battery module of the present invention. As shown in the drawing, a battery module according to an embodiment of the present invention may include: a plurality of secondary battery cells C; a battery cell housing part 10 in which the secondary battery cell C is mounted in a laid state; a lid portion 20 coupled to the battery cell accommodating portion 10 to cover an opening portion of the battery cell accommodating portion 10 for accommodating the secondary battery cell C; and a heat sink part 30 disposed in the battery cell receiving part 10 and the cap part 20 and contacting the bottom B and the top T of the secondary battery cell C to discharge heat H transferred from the secondary battery cell to the outside.

That is, in the battery module of the present invention, the secondary battery cell C is mounted in the battery cell receiving part 10 in a flat state, and the heat sink parts 30 that receive the heat H and discharge to the outside are provided at the top T and the bottom B of the secondary battery cell mounted as described above, so that the heat dissipation performance of the battery module can be improved.

Wherein the heat sink part 30 receives not only the heat H transferred from the bottom B of the secondary battery cell C but also the heat H through the top T of the secondary battery cell C, the heat transfer path is increased, and thus the cooling performance can be improved.

Further, the battery module of the present invention includes the battery cell housing section 10 in which the secondary battery cells C are mounted flat, and therefore, when a plurality of the secondary battery cells C are provided, the secondary battery cells C can be stacked in the height direction of the battery cell housing section 10, whereby the degree of freedom in design change in the height direction of the battery cell housing section 10 can be secured.

The battery cell receiving part 10 is a structure in which the secondary battery cells C are disposed in a flat state, and for this reason, the battery cell receiving part 10 may include a lower plate member 11, an upper plate member 12, and an intermediate plate member 13.

That is, the battery cell receiving part 10 of the battery module according to one embodiment of the present invention may include: a lower plate member 11 on which the secondary battery cell C is mounted and which is in contact with a side surface S of the secondary battery cell C; an upper plate member 12 provided to face the lower plate member 11; and an intermediate plate member 13 coupled to connect the lower plate member 11 and the upper plate member 12, and contacting the bottom B of the secondary battery cell C.

In other words, the battery cell housing part 10 of the present invention is configured such that the lower plate member 11 is in contact with the side surface part S of the secondary battery cell C and the intermediate plate member 13 is in contact with the bottom part B of the secondary battery cell C. As an example, the battery cell accommodating portion 10 may be configured such that the secondary battery cells C are inserted and disposed in a flat state in a space formed by the lower plate member 11, the upper plate member 12, and the intermediate plate member 13. The battery cell container 10 may be made of aluminum (Al), steel (Fe), or the like.

Therefore, when a plurality of the secondary battery cells C are provided, the secondary battery cells C can be stacked in the height direction of the battery cell housing part 10, and thus, the degree of freedom in design change in the height direction of the battery cell housing part 10 can be secured.

The lower plate member 11 is disposed at the lower portion of the battery cell receiving part 10, and the secondary battery cell C is mounted on the lower plate member 11 in a flat state. The lower plate member 11 may be disposed to face the upper plate member 12, and the intermediate plate member 12 may be disposed and coupled between the lower plate member 11 and the upper plate member 12.

The lower plate member 11 may be in contact with the side surface S of the secondary battery cell C when the secondary battery cell C is placed in a flat state, and the lower plate member 11 may be in contact with the side surface S of the lowermost secondary battery cell C when a plurality of secondary battery cells C are stacked and provided.

The upper plate member 12 may face the lower plate member 11 and may be in contact with the side surface S of the secondary battery cell C, and when a plurality of secondary battery cells C are provided, the upper plate member 12 may be in contact with the side surface S of the uppermost secondary battery cell C.

Among them, a cushion member may be provided between the lower plate member 11 and the secondary battery cell C and between the upper plate member 12 and the secondary battery cell C, and the cushion member may play a role of buffering when the volume of the secondary battery cell C is changed due to swelling (swelling). Specifically, a side pad of the pad member may be provided between the lower plate member 11 and the side surface portion S of the lowermost secondary battery cell C, or the side pad may be provided between the upper plate member 12 and the side surface portion S of the uppermost secondary battery cell C.

Also, even if the side pads are not in contact with the lower plate member 11 or the upper plate member 12, the side pads may be provided between the stacked secondary battery cells C to absorb a volume change due to expansion of the secondary battery cells C.

The intermediate plate member 13 is a structure that is joined between the lower plate member 11 and the upper plate member 12, and forms a space for accommodating the secondary battery cells C with the lower plate member 11 and the upper plate member 12.

As an example, the middle plate member 13 of the battery cell receiving part 10 according to one embodiment of the present invention may be characterized in that both end portions of the middle plate member 13 are perpendicularly coupled to the lower plate member 11 and the upper plate member 12, respectively, which are disposed parallel and opposite to each other.

In other words, the middle plate member 13 may be vertically disposed, and the lower plate member 11 and the upper plate member 12 are parallel to each other and are respectively coupled to both end portions of the middle plate member 13.

More specifically, the middle plate member 13 may be coupled to central portions of the lower plate member 11 and the upper plate member 12 to form an "I" shape, or the middle plate member 13 may be coupled to edge portions of the lower plate member 11 and the upper plate member 12 to form a "half-transverse" shape.

Also, the middle plate member 13 may be in contact with the bottom B of the secondary battery cell C, thereby receiving the heat H generated from the secondary battery cell C and discharging the heat H to the outside through the heat sink part 30.

Among them, the battery cell receiving part 10 of the battery module according to one embodiment of the present invention may be characterized in that a pouch-type secondary battery cell C sealing three sides to receive an electrode assembly or a can-type secondary battery cell C sealing one side to receive an electrode assembly is stacked in the battery cell receiving part 10.

Accordingly, the bottom B of the secondary battery cell C does not form the sealing portion E of the battery cell main body member formed when sealing the electrode assembly of the secondary battery cell C, and therefore, the secondary battery cell C is in contact with the intermediate plate member 13 to transfer the heat H generated from the secondary battery cell C to the intermediate plate member 13 without considering the sealing portion E.

However, such pouch-type secondary battery cell C and can-type secondary battery cell C are merely examples of the secondary battery cell C accommodated in the battery module of the present invention, and the secondary battery cell C accommodated in the battery module of the present invention is not limited to the types.

The lid portion 20 has a function of protecting the secondary battery cell C accommodated in the battery cell accommodating portion 10 by cooperating with the battery cell accommodating portion 10.

For this reason, the lid portion 20 is provided to cover an entrance where the secondary battery cell C is accommodated, that is, an opening portion of the battery cell accommodating portion 10, thereby covering the secondary battery cell C by being fitted to the battery cell accommodating portion 10. Specifically, the lid part 20 may include a side lid member 22 for covering side surfaces of the battery cell accommodating part 10 and an end lid member 21 for covering front and rear end portions of the battery cell accommodating part 10.

That is, the cap portion 20 may include: end cover members 21 coupled to both ends of the intermediate plate member 13; and a side cover member 22 disposed opposite to the middle plate member 13 and coupled to edge portions of the upper plate member 12 and the lower plate member 11.

Wherein a side heat sink 32 of the heat sink part 30 is provided in the side cover member 22, and thus the heat H transferred through the top T of the secondary battery cell C can be discharged to the outside.

Further, a support piece 22a may be formed in the side cover member 22, and the support piece 22a stably supports the plurality of secondary battery cells C stacked in the height direction of the battery cell receiving part 10, which will be described later in detail with reference to fig. 5.

The end cover member 21 may be provided with a bus bar, a substrate, and the like connected to the electrode tab of the secondary battery cell C. The structure of the bus bar, the substrate, and the like provided on the end cover member 21 may be designed and modified according to a multi-electrode tab case in which an anode electrode tab and a cathode electrode tab are formed at one end of the secondary battery cell C, or a single-electrode tab case in which an anode electrode tab is formed at one end of the secondary battery cell C and a cathode electrode tab is formed at the other end thereof.

The heat sink portion 30 has a function of discharging heat H generated from the secondary battery cell C transferred through the battery cell accommodating portion 10 and the lid portion 20 to the outside.

As an example, the heat sink portion 30 may be configured to receive the heat H discharged from the secondary battery cell C by using a flowing cooling fluid and discharge the heat to the outside. That is, the cooling fluid having a temperature lower than that of the secondary battery cell C receives heat H generated from the secondary battery cell C while flowing inside the battery cell receiving part 10 and the cap part 20, is formed into a high-temperature cooling fluid, flows to the outside having a temperature lower than that of the secondary battery cell C and dissipates heat, and then circulates the cooling fluid again in the direction of the secondary battery cell C, thereby discharging the heat H of the secondary battery cell C to the outside.

However, the heat sink portion 30 is not limited to the above configuration, and may be the heat sink portion 30 of the present invention as long as the heat H transferred from the secondary battery cell C can be discharged to the outside.

Such a radiator portion 30 may include a center radiator 31, a side radiator 32, and the like according to a specific installation position, and a detailed description thereof will be described later with reference to fig. 3.

Fig. 3 and 4 are front views showing only the heat sink part 30 in the battery module of the present invention, wherein fig. 3 shows an embodiment in which the side heat sink 32 receives heat H with the heat conductive member 34 as a medium, wherein the heat conductive member 34 is disposed at the remaining top T portion of the secondary battery cell C except for the portion where the sealing part E of the secondary battery cell C is folded. Fig. 4 is a view showing an embodiment in which a cooling fin (cooling fin) member 33 is provided.

Referring to the drawings, the heat sink part 30 of the battery module according to one embodiment of the present invention may include a central heat sink 31 that is disposed in the middle plate part 13 and discharges heat H transferred from the bottom B of the secondary battery cell C to the outside.

That is, the center heat sink 31 may be provided in the middle plate part 13 while the middle plate part 13 is in contact with the bottom B of the secondary battery cell C, and thus the center heat sink 31 may receive heat from the bottom B of the secondary battery cell C and discharge the heat to the outside.

Also, the heat sink part 30 of the battery module according to one embodiment of the present invention may include a side heat sink 32, the side heat sink 32 being disposed in the side cover part 22 of the battery cell receiving part 10 opposite to the middle plate part 13, and discharging the heat H transferred from the top T of the secondary battery cell C to the outside.

That is, the side heat sink 32 may be provided in the side cover part 22, the side cover part 22 being in contact with the top T of the secondary battery cell C, and thus the side heat sink 32 can receive heat H from the top T of the secondary battery cell C and discharge the heat to the outside.

However, since the top T of the secondary battery cell C is further provided with the sealing portion E, the side cover member 22 cannot be brought into contact with the entire top T of the secondary battery cell C, and can be brought into contact with only the portion of the top T of the secondary battery cell C other than the portion where the sealing portion E is folded.

That is, the heat conductive member 34 of the battery module according to one embodiment of the present invention may be characterized in that the heat conductive member 34 is formed at the remaining region of the top T of the secondary battery cell C adjacent to the region where the sealing part E of the secondary battery cell C is folded, and the sealing part E of the secondary battery cell C is protrudingly formed at the top T of the secondary battery cell C.

Also, the side cover member 22 forms a gap with the top T of the secondary battery cell C due to the sealing portion E, and thus may serve as a medium by providing a heat conductive member 34 to fill the gap.

That is, the heat sink part 30 of the battery module according to one embodiment of the present invention may include heat conductive members 34, the heat conductive members 34 being disposed between the middle plate part 13, in which the central heat sink 31 is disposed, and the bottom B of the secondary battery cell C and between the side cover part 22, in which the side heat sinks 32 are disposed, and the top T of the secondary battery cell C, thereby forming a heat moving path.

As described above, the contact rate between the center heat sink 31 and the middle plate part 13 and between the side heat sinks 32 and the side cover parts 22 can be improved by providing the heat conductive parts 34.

That is, the bottom B and the top T of the secondary battery cell C may not be completely flat, and therefore, it is difficult to completely attach the secondary battery cell C to the intermediate plate member 13 or the secondary battery cell C to the side cover member 22, but the provision of the heat conductive member 34 can improve such a problem.

Therefore, the efficiency of transferring the heat H generated by the secondary battery cells C to the middle plate member 13 provided with the center heat sink 31 can be improved, and the efficiency of transferring the heat H generated by the secondary battery cells C to the side cover member 22 provided with the side heat sinks 32 can be improved.

The heat-conducting member 34 is formed to have a shape corresponding to the shape of the bottom portion B of the secondary battery cell C so as to support the secondary battery cell C, and a detailed description thereof will be described later with reference to fig. 5.

Further, the heat sink part 30 of the battery module according to one embodiment of the present invention may include a cooling fin member 33 that is disposed between the adjacent secondary battery cells C and has one end portion extended to be adjacent to the middle plate member 13 and the other end portion extended to be in contact with the side cover member 22.

As described above, since the cooling fin member 33 is provided, the heat H generated by the secondary battery cell C can be discharged through the side surface portion S of the secondary battery cell C. This can further improve the cooling performance of the secondary battery cell C.

That is, one end of the cooling fin member 33 extends to be adjacent to the middle plate member 13 and the other end extends to be in contact with the side cover member 22, and the cooling fin member is disposed between the adjacent secondary battery cells C and thus in contact with the side surface portions S of the secondary battery cells C, whereby the cooling fin member 33 can transfer heat H generated from the secondary battery cells C to the side cover member 22 by being in contact with the side surface portions.

Further, the cooling fin member 33 of the battery module according to one embodiment of the present invention may be characterized in that a contact plate 33a for enlarging a contact area with the side cover member 22 is provided at the other end portion of the cooling fin member 33.

Such contact plate 33a has a function of expanding a path of heat H that transfers the heat H transferred through the side surface portions S of the secondary battery cells C to the side cover member 22.

Therefore, the heat H transferred to the side cover member 22 can be efficiently transferred, and finally, the cooling performance of the secondary battery cell C can be improved.

The contact plate 33a is provided perpendicular to the other end of the cooling fin member 33, and the contact plate 33a corresponds to a T-shaped head of the cooling fin member 33.

Fig. 5 is a front view illustrating an embodiment including support sheet 22a in the battery module of the present invention. Referring to the drawings, the heat conductive member 34 of the battery module according to the embodiment of the present invention may be characterized in that a portion of the heat conductive member 34 contacting the bottom B of the secondary battery cell C is formed in a shape corresponding to the shape of the bottom B of the secondary battery cell C, thereby supporting the secondary battery cell C.

Therefore, the heat conductive member 34 can support the plurality of secondary battery cells C mounted in the battery cell housing portion 10 in a stacked state in the height direction.

That is, the heat-conducting member 34 is formed in a shape corresponding to the bottom portion B of the secondary battery cell C and is provided in a shape inserted into the bottom portion B of the secondary battery cell C, so that it is possible to support a plurality of secondary battery cells C stacked in a flat state in the height direction of the battery cell housing portion 10 at the height at which each secondary battery cell C is located.

In other words, among the plurality of secondary battery cells C stacked in the height direction of the battery cell receiving part 10, the secondary battery cell C disposed at the lower portion may be pressed by the secondary battery cell C disposed at the upper portion, and thus there is a problem in that the secondary battery cell C may be broken. However, in the present invention, the weight of each secondary battery cell C is supported by the heat conductive member 34, respectively, so that it is possible to prevent a problem that the secondary battery cell C is pressed against an adjacent and lower secondary battery cell C to cause breakage of the secondary battery cell C.

Among them, the heat conductive member 34 of the battery module according to one embodiment of the present invention may be characterized in that the heat conductive member 34 may be formed of at least one material of silicone, urethane, and epoxy materials to adhere the secondary battery cells C.

That is, the heat conductive member 34 is bonded to each other by adhesion with the intermediate plate member 13 and the bottom B of the secondary battery cell C, and therefore the heat conductive member 34 may be formed of the material to be able to support the secondary battery cell C also by adhesion.

However, the material of the heat-conducting member 34 is not limited to the above-described material, and may be the heat-conducting member 34 of the present invention as long as it can transmit the heat H and has adhesive force.

Also, the side heat sink 32 of the battery module according to one embodiment of the present invention may be characterized in that the side heat sink 32 extends to the support pieces 22a of the side cover part 22, and the support pieces 22a of the side cover part 22 are protrudingly formed toward the secondary battery cells C to support each of the plurality of secondary battery cells C received in the battery cell receiving part 10 in a stacked manner.

Here, by providing the support pieces 22a to the side cover member 22, the plurality of secondary battery cells C stacked in a flat state in the battery cell housing 10 can be supported in the height direction.

That is, the plurality of secondary battery cells C stacked in the height direction of the intermediate plate member 13 are placed on the support pieces 22a adjacent to the top T, respectively, whereby the plurality of secondary battery cells C stacked in a flat state in the height direction of the battery cell housing part 10 can be supported at the height at which each secondary battery cell C is located.

In other words, among the plurality of secondary battery cells C stacked in the height direction of the battery cell receiving part 10, the secondary battery cell C disposed at the lower portion may be pressed by the secondary battery cell C disposed at the upper portion, and thus there is a problem in that the secondary battery cell C may be broken, whereas in the present invention, the weight of each secondary battery cell C is supported by the support pieces 22a, respectively, so that it is possible to prevent the secondary battery cell C from being broken by being pressed against the secondary battery cell C disposed adjacent and below.

Also, the support pieces 22a further extend to be close to the top T of the secondary battery cell C, and therefore, the side heat sink 32 extends to the support pieces 22a, so that the heat transfer efficiency can be further improved.

As an example, when the side heat sink 32 is in a structure in which a cooling fluid circulates, the cooling fluid extends and circulates to the support sheet 22a, and thus may be relatively close to the top T of the secondary battery cell C, thereby enabling a heat transfer path to be shortened. Thereby, the heat transfer efficiency through the top T can be improved.

Among them, the support sheet 22a of the battery module according to one embodiment of the present invention may be characterized in that the support sheet 22a is formed in a form corresponding to the remaining region of the top T of the secondary battery cell C adjacent to the region where the sealing part E of the secondary battery cell C is folded, wherein the sealing part E of the secondary battery cell C is protrudingly formed at the top T of the secondary battery cell C.

Therefore, the secondary battery cell C can be further closely attached and supported in the height direction of the battery cell accommodating portion 10. This improves the heat transfer efficiency through the top portion T, and further stably supports the secondary battery cell C.

The embodiments of the present invention have been described above, but the scope of the right of the present invention is not limited thereto, and it will be apparent to those skilled in the art that various modifications and changes may be made without departing from the scope of the technical idea of the present invention recited in the claims.