KR20190044872A - Battery Module Having Heat Shielding Function - Google Patents

Abstract

A battery module having a heat shielding function is disclosed. The battery module according to an embodiment of the present invention comprises: a stack of battery cells in which two or more battery cells are stacked and arranged so as to be adjacent to each other in a lateral direction; a plurality of cooling members interposed to be in contact with at least one surface of each of the battery cells; and a heat resistance material positioned between the battery cells to form a partition wall. Accordingly, even when heat or fire occurs in some of the battery cells, the phenomenon affecting adjacent battery cells can be blocked or delayed by the heat resistance material.

Description

[0001] The present invention relates to a battery module Having Heat Shielding Function,

Embodiments of the present invention relate to a battery module having a thermal shutdown function.

A rechargeable secondary battery is widely used as an energy source for wireless mobile devices. In addition, the secondary battery is an electric vehicle (EV), a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (HEV), and the like, which are proposed as solutions for air pollution of existing gasoline vehicles and diesel vehicles using fossil fuels (Plug-In HEV) and the like.

In a small mobile device, one to four battery cells are used per device. In contrast, a middle- or large-sized device such as an automobile uses a battery module in which a plurality of battery cells are electrically connected to each other due to the necessity of a high output large capacity.

Since the battery module is preferably manufactured in a small size and a weight as much as possible, a prismatic battery, a pouch-shaped battery, and the like, which can be charged with a high degree of integration and have a small weight to capacity ratio, are mainly used as battery cells of a middle- or large-sized battery module. Particularly, a pouch-shaped battery using an aluminum laminate sheet or the like as an exterior member has recently attracted a great deal of attention due to its advantages such as low weight and low manufacturing cost.

In addition, since various combustible materials are embedded in the lithium secondary battery, there is a danger of overheating or explosion due to overcharging, overcurrent, other physical external impact, and the like, which has a serious disadvantage in safety. Therefore, in the case of a battery module or a battery pack including a plurality of such secondary batteries, a battery management system (BMS) may be used to manage the battery safely and efficiently.

However, in spite of such measures, a fire may occur inside the battery pack due to an external impact, an abnormal operation of the internal battery cell, a control failure by the BMS, or the like.

When a fire occurs inside the battery pack, the insulation coating of the electric wire existing inside due to the high-temperature flame may be burned. In this case, the electric wire whose insulation function is lost may be connected to other parts in the battery pack, The leakage or short circuit of the high voltage current may occur, resulting in further accelerating the fire inside the battery pack.

Particularly, ignition or explosion caused in some of the battery cells constituting the battery module may be continuously transferred to other battery cells, resulting in a serious condition. Therefore, when deterioration occurs in a part of the battery cell, There is a high need for research that blocks or delays adverse effects.

Korean Patent Publication No. 10-2014-0064418 (May 28, 2014)

Embodiments of the present invention are intended to provide a structure capable of blocking or maximally delaying influences of adjacent battery cells when deterioration occurs in a part of battery cells located inside the battery module.

Embodiments of the present invention also provide a battery module capable of solving safety problems such as ignition and explosion of the battery module.

According to an embodiment of the present invention, there is provided a battery cell stack comprising two or more battery cells stacked and arranged adjacent to each other in a lateral direction; A plurality of cooling members interposed to contact at least one surface of each of the battery cells; And a refractory material disposed between the battery cells to form a partition wall.

Further, a pair of the cooling members are interposed between two adjacent battery cells, the refractory material is located between the pair of cooling members, and the pair of cooling members are connected to the adjacent two battery cells Facing the side surfaces facing each other in the first embodiment.

The plurality of cooling members may include a first cooling member, a second cooling member, and a second cooling member, which are in contact with the first battery cell and the second cooling cell, Member, and a fourth cooling member, and the refractory material may be located between the second cooling member and the third cooling member.

Further, the refractory material may be additionally located outside the first cooling member and the fourth cooling member.

The plurality of cooling members may be a metal plate of a thermally conductive material.

Further, the refractory material may be coated or coated on a portion outside the cooling members at a portion where the cooling member is not in contact with the battery cells.

In addition, the refractory material may be a refractory paint applied to an outer portion of the cooling members at a portion where the cooling member does not contact the battery cells.

In addition, the refractory material may be a refractory foil in which the cooling member contacts an outer portion that is not in contact with the battery cells.

The refractory material may be a refractory material in which the cooling member is in contact with an outer portion of the battery cell that is not in contact with the battery cells.

According to embodiments of the present invention, there is provided a battery module, comprising: a battery cell stack in which two or more battery cells are stacked and arranged so as to be adjacent to each other in the lateral direction; The plurality of cooling members and the refractory material disposed between the battery cells to form the partition wall can prevent the occurrence of a phenomenon affecting other adjacent battery cells due to the refractory material even when heat is generated or fire occurs in some of the battery cells Block or as much delay as possible.

1 is a sectional view showing the structure of a battery module according to an embodiment of the present invention
2 is a cross-sectional view showing a laminated structure of the battery module of Fig. 1
3 is a cross-sectional view illustrating a structure of a battery module according to another embodiment of the present invention
4 is a cross-sectional view showing a laminated structure of the battery module of Fig. 3

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The following detailed description is provided to provide a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, this is merely an example and the present invention is not limited thereto.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intention or custom of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification. The terms used in the detailed description are intended only to describe embodiments of the invention and should in no way be limiting. Unless specifically stated otherwise, the singular form of a term includes plural forms of meaning. In this description, the expressions " comprising " or " comprising " are intended to indicate certain features, numbers, steps, operations, elements, parts or combinations thereof, Should not be construed to preclude the presence or possibility of other features, numbers, steps, operations, elements, portions or combinations thereof.

FIG. 1 is a cross-sectional view illustrating a structure of a battery module according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view illustrating a stacked structure of the battery module of FIG.

Referring to FIG. 1, a battery module 100 according to an embodiment of the present invention includes two or more battery cells 111 and 112 stacked and arranged to be adjacent to each other in a lateral direction, A plurality of cooling members 121 and 122 interposed in contact with at least one surface of each of the battery cells 110 and 112 and a plurality of battery cells 111 and 112, Material 130 may be included.

The battery cells 111 and 112 may have a rectangular structure in which the electrode leads 141 and 142 are protruded to the upper or both ends of the battery cells 111 and 112 in one direction, A pouch-type battery cell having a structure in which resin layers are mutually fused by applying heat and pressure to a mutual contact portion in a state where an electrode assembly (not shown) is mounted in a battery case made up of a metal layer and a resin layer sequence. However, It is not.

The battery cells 111 and 112 may have a structure of a battery module 100 that is electrically connected to one another in series or in parallel and may have cell covers for covering the structure of the battery module 100, But it is not limited to this structure.

It is needless to say that the structure of the battery cell stack 110 may be variously stacked depending on the number or shape of the battery cells 111 and 112 to be applied.

On the other hand, the cooling members 121 and 122 are not particularly limited as long as they are excellent in thermal conductivity for high cooling efficiency. For example, the cooling members 121 and 122 may be metal plates made of a metal material having high thermal conductivity, It may be a metal plate of copper material.

That is, as illustrated in FIG. 2, a structure that directly contacts the surfaces of the battery cells 111 and 112 to emit heat generated in the battery cells 111 and 112, includes cooling members 121 and 122 The cooling members 121 and 122 may further include a heat dissipation unit having a structure in which refrigerant flows to one side of the cooling members 121 and 122. [

In addition, the refractory material 130 may be made of a material having high durability against a high-temperature environment or a flame, and the shape for the refractory material 130 to be located is not particularly limited. For example, The refractory material 130 may be coated on or coated on the outer side of the cooling members 121 and 122 at locations where the battery cells 122 and 122 are not in contact with the battery cells 111 and 112.

Specifically, the refractory material 130 includes refractory material 130 on the outer side of the cooling members 121 and 122 at locations where the cooling members 121 and 122 are not in contact with the battery cells 111 and 112 The refractory paint is applied.

The refractory material 130 itself includes the refractory material 130. The refractory material 130 includes the cooling members 121 and 122 at portions where the cooling members 121 and 122 are not in contact with the battery cells 111 and 112, 122, but it is not limited to such an embodiment.

Accordingly, the battery module 100 according to an embodiment of the present invention is formed by stacking two or more battery cells 111, 112 and arranging them in the lateral direction so as to be adjacent to each other, Since the refractory material 130 that is located between the cells 111 and 112 and forms the partition wall includes the refractory material 130, even when heat or fire occurs in some of the battery cells 111, It is possible to block or maximally delay the phenomenon affecting the battery module 112, and it is possible to solve the problem that heat or fire occurs in the entire battery module 100 due to heat generation or fire in some battery cells 111, Therefore, it is possible to secure the time for the maximum evacuation even in an environment where a fire occurs in a vehicle or the like to which the battery module 100 is applied, and minimize the damage to persons.

FIG. 3 is a cross-sectional view illustrating a structure of a battery module according to another embodiment of the present invention, and FIG. 4 is a cross-sectional view illustrating a stacked structure of the battery module of FIG.

3, the battery module 200 according to another embodiment of the present invention is interposed in a structure in which the cooling members 221 and 222 are in contact with both side surfaces of one battery cell 211, A pair of cooling members 222 and 223 are interposed between two adjacent battery cells 211 and 212 and a refractory material 230 is disposed between the pair of cooling members 222 and 223 Lt; / RTI >

Specifically, as illustrated in FIG. 4, the cooling members 221, 222, 223, and 224 include a first cooling member 221 having one surface in contact with the first battery cell 211, And a third cooling member 223 and a fourth cooling member 224 that are in contact with the second battery cell 212 positioned adjacent to the first battery cell 211, 2 may be a structure in which the refractory material 230 is located between the second cooling member 222 and the third cooling member 223.

That is, the refractory material 230 is disposed on each of the first battery cell 211 and the second battery cell 211 in the insulation cell stack 210 in which the first battery cell 211 and the second battery cell 212 are arranged, The refractory material 230 may be arranged in a structure that does not contact the first cooling member 221 and the fourth cooling member 224 and that the refractory material 230 is further disposed outside the first cooling member 221 and the fourth cooling member 224, And may be a structure interposed between cells (not shown).

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, . Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by equivalents to the appended claims, as well as the appended claims.

100, 200: Battery module
110, 210: Battery cell laminate
111, 112: Battery cell
121, 122: cooling member
130, 230: Refractory material
141, 142: electrode lead
211: first battery cell
212: second battery cell
221: first cooling member
222: second cooling member
223: third cooling member
224: fourth cooling member

Claims (9)

A battery cell laminate in which two or more battery cells are stacked and arranged so as to be adjacent to each other in a lateral direction;
A plurality of cooling members interposed to contact at least one surface of each of the battery cells; And
A refractory material positioned between the battery cells to form a partition wall;
And a battery module.
The method according to claim 1,
A pair of cooling members are interposed between two adjacent battery cells,
Wherein the refractory material is located between the pair of cooling members,
Wherein the pair of cooling members are interposed in a structure in which the side surfaces of the two adjacent cooling cells contact each other.
The method of claim 2,
The plurality of cooling members may include a first cooling member having a first surface contacting the first battery cell, a second cooling member, a third cooling member having a first surface contacting the second battery cell positioned adjacent to the first battery cell, Wherein the refractory material is located between the second cooling member and the third cooling member.
The method of claim 3,
Wherein the refractory material is further located outside the first cooling member and the fourth cooling member.
The method according to claim 1,
Wherein the plurality of cooling members are metal plate members of a thermally conductive material.
The method according to claim 1,
Wherein the refractory material is coated or coated on an outer portion of the cooling members at a portion where the cooling member is not in contact with the battery cells.
The method of claim 6,
Wherein the refractory material is a refractory paint applied to an outer portion of the cooling members at a portion where the cooling member is not in contact with the battery cells.
The method according to claim 1,
Wherein the refractory material is a refractory material in which the cooling member is in contact with an outer portion that is not in contact with the battery cells.
The method according to claim 1,
Wherein the refractory material is a refractory material that is in contact with an outer portion of the cooling member that is not in contact with the battery cells.

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