WO2019083123A1

WO2019083123A1 - Battery module and method for producing same

Info

Publication number: WO2019083123A1
Application number: PCT/KR2018/007779
Authority: WO
Inventors: 박상훈
Original assignee: 삼성에스디아이(주)
Priority date: 2017-10-23
Filing date: 2018-07-10
Publication date: 2019-05-02
Also published as: KR20190044951A; KR102499545B1

Abstract

An embodiment of the present invention relates to a battery module comprising a plurality of battery cells and a method for producing same, and the technical problem thereof to be addressed is to provide a battery module, in which each battery cell is insulated from one another, and a method for producing same. To this end, the present invention provides a battery module comprising: a first battery cell; a second battery cell disposed next to the first battery cell; and a first insulation member which is made of an insulating material, is formed in a plate shape, is bent along an arbitrary bending line, is disposed between the first battery cell and the second battery cell, and has one side, from the bending line, attached to the first battery cell and the other side attached to the second battery cell.

Description

Battery module and manufacturing method thereof

An embodiment of the present invention relates to a battery module including a plurality of battery cells and a method of manufacturing the same.

Unlike the primary battery, the secondary battery can perform charging and discharging repeatedly. Generally, a small-capacity secondary battery is mainly used for portable electronic devices such as a mobile phone, a notebook, and a camcorder, and a large-capacity secondary battery can be used for an electric automobile or the like.

At this time, a plurality of battery cells may be connected in series or in parallel to constitute one battery module for high capacity. In this case, a spacer may be provided between each battery cell or a rib may be formed in the housing of the battery module in order to prevent the battery cells from being electrically connected to each other at unintentional points so that the battery cells are separated from each other. However, according to this, the volume of the battery module increases, which results in a decrease in efficiency and an increase in cost.

The information disclosed in the background of the present invention is only intended to improve the understanding of the background of the present invention. And therefore may include information that does not constitute the prior art.

Embodiments of the present invention provide a battery module in which battery cells are insulated from each other, and a method of manufacturing the same.

A battery module according to an embodiment of the present invention includes a first battery cell, a second battery cell disposed adjacent to the first battery cell, and an insulating material, and is formed in a plate shape and is bent along an arbitrary curve, And a first insulating member disposed between the first battery cell and the second battery cell and having one side attached to the first battery cell and the other side attached to the second battery cell with reference to the folding line .

The folding line of the first insulating member may be disposed on the same plane as one side of the first battery cell and the second battery cell that are adjacent to each other in parallel.

One side of the first insulating member may be formed on one surface of the first battery cell facing the second battery cell or on an opposite surface of the second battery cell facing the first battery cell.

The battery pack may further include an extension extending from one side of the first insulation member to one side of the first insulation member and attached to another side adjacent to one side of the first battery cell.

And a third battery cell and an insulating material disposed adjacent to the second battery cell on the opposite side of the first battery cell with respect to the second battery cell and formed in a plate shape, And a second insulating member disposed between the second battery cell and the third battery cell, one side of which is attached to the second battery cell and the other side of which is attached to the third battery cell, .

Wherein a fold line of the first insulating member is disposed on the same plane as a side of the second battery cell adjacent to the first battery cell in parallel to the first battery cell, And may be located on the same plane as the other surface opposite to the one surface.

In another aspect of the present invention, there is provided a method of manufacturing a battery module, the method comprising: disposing a second battery cell adjacent to the first battery cell; disposing the first battery cell and the second battery cell, And a step of bending the first insulating member along a boundary line between the first battery cell and the second battery cell, wherein the step of attaching the first insulating member includes the steps of: can do.

In addition, the first insulating member may have a groove along an area corresponding to the boundary line.

Also, the first insulating member may be formed on one side of the first battery cell or on one side of the second battery cell with one side with respect to the boundary line.

The method may further include the step of forming an extension extending from one side of the first insulation member to extend beyond one side of the first battery cell so as to bend the extension and attach the battery cell to the other side adjacent to one side of the first battery cell .

In addition, in the disposing step, a third battery cell is further disposed adjacent to the second battery cell on the opposite side of the first battery cell with respect to the second battery cell, and in the attaching step, And a second insulating member made of an insulating material is further attached to one surface of the third battery cell opposite to the other surface and adjacent to the other surface of the third battery cell adjacent to the other surface of the second battery cell, And bending the second insulating member along a boundary line of the third battery cell.

The embodiment of the present invention can insulate battery cells from each other through a relatively simple process of arranging a plurality of battery cells adjacent to each other and attaching and bending an insulating member to each side of the battery cell adjacent to each other, Can be saved.

Further, by forming a double insulated structure through one side and the other side of the insulating member, the insulation of the battery cell can be assured more reliably. At this time, if the one side and the other side are made of different materials, the insulation effect of various and complex characteristics can be given.

Furthermore, by using a plate-shaped insulating member, the space for inserting the battery cells can be further reduced, and the battery module can be further reduced in size or weight.

1 is a flowchart of a method of manufacturing a battery module according to an embodiment of the present invention.

2 illustrates a step of attaching an insulating member in a method of manufacturing a battery module according to an embodiment of the present invention.

FIG. 3 illustrates a bending step of an insulation member in a method of manufacturing a battery module according to an embodiment of the present invention.

4 is a perspective view of a battery module according to an embodiment of the present invention.

5 illustrates a step of attaching an insulating member in a method of manufacturing a battery module according to another embodiment of the present invention.

6 illustrates a bending step of an insulation member in a method of manufacturing a battery module according to another embodiment of the present invention.

7 is a perspective view of a battery module according to another embodiment of the present invention.

8 illustrates a step of attaching an insulating member in a method of manufacturing a battery module according to another embodiment of the present invention.

9 is a view illustrating a step of bending an insulation member in a method of manufacturing a battery module according to another embodiment of the present invention.

10 is a perspective view of a battery module according to another embodiment of the present invention.

11 illustrates a step of attaching an insulating member in a method of manufacturing a battery module according to another embodiment of the present invention.

12 illustrates a bending step of an insulation member in a method of manufacturing a battery module according to another embodiment of the present invention.

13 is a perspective view of a battery module according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed to the person skilled in the art. The present invention is not limited to these embodiments.

Also, the size and thickness of some elements in the drawings may be somewhat exaggerated for convenience of explanation and for convenience of understanding. In the figures, the same reference numerals are used for the same elements.

As used herein, the term " and / or " includes any and all combinations of one or more of the listed items. As used herein, the term " connected " means not only when the member A and the member B are directly connected but also when the member C is interposed between the member A and the member B and the member A and the member B are indirectly It is interpreted to include the case of connection.

In addition, the terms used in the specification are intended to specifically illustrate specific embodiments and are not intended to limit the present invention. The singular forms as used herein may include a plurality of forms unless the context clearly dictates otherwise. It is also to be understood that the word " comprise, " and / or " comprising ", as used herein, Numbers, operations, elements, elements and / or the presence or addition of one or more of the other features, numbers, operations, elements, elements, and / or groups thereof.

Although the terms first, second, etc. are used herein to describe various elements, components, regions, layers and / or sections, it is to be understood that these elements, components, regions, layers and / Can not be done. It is used to distinguish one element, component, region, layer or section from another, member, component, region, layer or section. Thus, for example, a first member, component, region, layer or section may be referred to as a second member, component, region, layer or section without departing from the invention.

Beneath, " " below, " " lower, " " above, " or " above, "quot; upper " can be used. The term for such a space is not intended to limit the present invention for a clear understanding of the present invention depending on various process states or conditions of use of the present invention. For example, when an element or feature is inverted, the element or feature described as " lower " or " below " As a result, "lower" is a concept that includes "upper" or "upper".

1 is a flowchart of a method of manufacturing a battery module according to an embodiment of the present invention. FIG. 2 illustrates a step S12 of attaching an insulating member in a method of manufacturing a battery module according to an embodiment of the present invention, and FIG. 3 illustrates a step of bending an insulating member in the method of manufacturing a battery module according to an embodiment of the present invention S13). 4 is a perspective view of a battery module 100 according to an embodiment of the present invention.

Referring to FIG. 1, a battery module manufacturing method includes a battery cell disposing step S11, an insulating member attaching step S12, and an insulating member bending step S13.

The first battery cell 110 and the second battery cell 120 are prepared and the second battery cell 120 is disposed adjacent to the first battery cell 110 in the battery cell placement step S11.

Here, the first battery cell 110 and the second battery cell 120 include an electrode assembly composed of a positive electrode plate, a negative electrode plate, and a separator interposed between the positive electrode plate and the negative electrode plate, a case housing the electrode assembly and the electrolyte, a positive electrode plate and a negative electrode plate And a positive electrode tab and a negative electrode tab which are respectively drawn out to the outside. Accordingly, detailed configurations of the first battery cell 110 and the second battery cell 120 themselves are well known, and a further explanation thereof will be omitted.

Also, in the figure, the first battery cell 110 and the second battery cell 120 are shown to have a substantially rectangular parallelepiped shape. Of course, in the present invention, the first battery cell 110 and the second battery cell 120 are not necessarily formed in a square shape, but may be formed in a so-called pouch type or other type. Hereinafter, the first battery cell 110 and the second battery cell 120 are formed in a square shape as shown in the figure for the sake of understanding.

In this case, if a relatively short side is referred to as a short side and a relatively long side is referred to as a long side on the

surfaces

111 and 121 of the first battery cell 110 and the second battery cell 120 on which the positive and negative electrode tabs are located, The first battery cell 110 and the second battery cell 120 of the first battery cell 110 and the second battery cell 120 are formed such that the

respective surfaces

112 and 122 including the short sides are horizontally adjacent to each other and the

respective surfaces

113 and 123, Are arranged vertically and tangentially.

Next, in the insulating member attaching step S12, the insulating member 130 is prepared and attached to one

side

112 and 122 of the first battery cell 110 and the second battery cell 120, respectively.

Here, the insulating member 130 is made of an insulating material and formed into a substantially plate shape. For example, the insulating member 130 may be formed to a thickness of about 0.2 mm.

At this time, one side 131 of the insulating member 130 attached to the first battery cell 110 and the other side 132 of the insulating battery 130 attached to the second battery cell 120 may be made of the same material or may be made of different materials . A groove 133 is formed along one side 131 and the other side 132 of the insulating member 130, that is, along the boundary line between the first battery cell 110 and the second battery cell 120.

One side 131 of the insulating member 130 is formed in an area corresponding to one side 112 of the first battery cell 110 and the other side 132 is formed on one side 122 of the second battery cell 120 And is formed to have a corresponding area. However, the insulating member 130 is disposed between the first battery cell 110 and the second battery cell 120 to insulate the first and

second battery cells

110 and 120 from each other It may also be formed in other areas if it can fulfill its role. One side 131 of the insulating member 130 is formed to have an area corresponding to one surface 112 of the first battery cell 110 or one surface 122 of the second battery cell 120 and the other side 132 2 battery cell 120. In this case, Or the other side 132 of the insulating member 130 is formed to have an area corresponding to one surface 122 of the second battery cell 120 or one surface 112 of the

first battery cell

110, 1 may be formed to have an area smaller than one surface 112 of one battery cell 110. Hereinafter, for ease of understanding, one side 131 and the other side 132 of the insulating member 130 are bonded to one surface 112 of the first battery cell 110 and one surface 112 of the second battery cell 120, (Not shown) are formed in correspondence with the respective grooves 122, respectively.

Lastly, in the insulating member bending step S13, the insulating member 130 is bent while opening the opposite side of the first battery cell 110 and the second battery cell 120 to which the insulating member 130 is attached. 3, if the insulating member 130 is attached to the upper portions of the first battery cell 110 and the second battery cell 120, the first battery cell 110 and the second battery cell 120 The insulating member 130 is bent in a substantially ∨ shape so that one side 131 and the other side 132 are substantially 0 °.

As described above, since the grooves 133 are formed along the boundary line between the first battery cell 110 and the second battery cell 120 among the insulating members 130, that is, along the grooves 133 By bending the insulating member 130, the insulating member 130 can be more easily bent in an intended shape.

4, the first battery cell 110 and the second battery cell 120 are adjacent to each other while the insulation member 130 is adjacent to the first battery cell 110 And one side 131 is attached to one surface 112 of the first battery cell 110 and the other side 132 is attached to one surface 122 of the second battery cell 120. [ So that the first battery cell 110 and the second battery cell 120 are isolated from each other so as not to directly contact each other.

4, the first battery cell 110 and the second battery cell 110 are connected to each other through the insulating member 130. At this time, a region between one side 131 and the other side 132 of the insulating member 130, And the other surfaces (113, 123) of the second battery cell (120).

The first battery cell 110 and the second battery cell 120 are insulated from each other by a relatively simple process of attaching and bending the insulating member 130 to the first battery cell 110 and the second battery cell 120. [ So that the production cost and time can be saved.

Further, by forming a double insulation structure through one side 131 and the other side 132 of the insulation member 130, the insulation between the first battery cell 110 and the second battery cell 120 can be assured more reliably .

Furthermore, by using the plate-shaped insulating member 130, a space for insulating the first battery cell 110 and the second battery cell 120 can be further reduced, and the battery module 100 can be further downsized or lightened .

FIG. 5 illustrates a step S22 of attaching an insulating member in the method of manufacturing a battery module according to another embodiment of the present invention, and FIG. 6 illustrates a step S22 FIG. 7 is a perspective view of a battery module 200 according to another embodiment of the present invention.

Here, the first battery cell 110 and the second battery cell 120 are substantially the same components as the first battery cell 110 and the second battery cell 120 in FIGS. Therefore, the same reference numerals are used as they are, and this is also true in Figs.

In the method of manufacturing a battery module according to an embodiment of the present invention described above with reference to FIGS. 2 to 4, in the battery cell placement step S11, the first battery cell 110 and the second battery cell 120, Each of the

surfaces

112 and 122 is adjacently arranged horizontally so that each of the

surfaces

113 and 123 including the long sides are arranged vertically to each other. However, in the method of fabricating a battery module according to another embodiment of the present invention, as shown in FIG. 5, in the battery cell placement step S21, the first and

second battery cells

110 and 112, 122 are arranged vertically to each other and are adjacent to each other in such a manner that each of the

other surfaces

113, 123 is horizontally adjacent to each other.

The insulating member 230 is attached to the

other surfaces

113 and 123 of the first battery cell 110 and the second battery cell 120 and then the insulating member 230 is bent 7, the first and

second battery cells

110 and 122 are arranged on the first side 112 and the second side 120 of the second battery cell 120 in parallel with each other and the first side 231 of the insulation member 230, The first battery cell 110 and the second battery cell 120 are attached to the other surface 113 of the first battery cell 110 and the other side 232 is attached to the other surface 123 of the second battery cell 120, ) Is not directly contacted.

Other aspects are substantially the same as the method of manufacturing a battery module according to an embodiment of the present invention and the battery module 100 manufactured thereby and even if there are some different parts, And therefore the description of the redundant description is omitted.

The shape of the first battery cell 110 and the shape of the second battery cell 120 or the manner of attaching the insulating

members

130 and 230 may be differently applied to the

final battery modules

100 and 200 There is an advantage to be able to do.

FIG. 8 illustrates a step of attaching an insulating member (S32) in a method for manufacturing a battery module according to another embodiment of the present invention, and FIG. 9 illustrates a method of manufacturing a battery module according to still another embodiment of the present invention, (S33). 10 is a perspective view of a battery module 300 according to another embodiment of the present invention.

8, the insulating member 330 includes a first vertical extending portion 331A, a first horizontal extending portion 331B, a second vertical extending portion 332A, and a second vertical extending portion 332B extending from one side 331 and the other side 332, respectively. And a second horizontal extension 332B. For the sake of clarity, the terms vertical and horizontal are merely arbitrary concepts for the convenience of description, and do not mean absolute positions or directions.

The first vertical extension part 331A further extends beyond the area corresponding to one side 112 of the first battery cell 110 substantially vertically to the groove 333 from one side 331 of the insulating member 330. [

The first horizontal extension portion 331B further extends beyond the region corresponding to one surface 112 of the first battery cell 110 substantially horizontally from the one side 331 of the insulating member 330 to the groove 333. [

The second vertical extension part 332A further extends beyond the area corresponding to one surface 122 of the second battery cell 120 substantially perpendicular to the groove 333 from the other side 332 of the insulating member 330. [

The second horizontal extension portion 332B further extends beyond the region corresponding to one surface 122 of the second battery cell 120 substantially horizontally from the other side 332 of the insulating member 330 to the groove 333. [

The insulation member 330 is attached to the first and

second battery cells

110 and 120 adjacent to each other horizontally adjacent to each other in a step S32 of attaching the insulation member 9, the first vertical extension portion 331A and the first horizontal extension portion 331B are bent to form two

surfaces

111 and 114 adjacent to one surface 112 of the first battery cell 110, And the second vertical extension part 332A and the second horizontal extension part 332B are respectively attached to two

surfaces

121 and 124 adjacent to one surface 122 of the second battery cell 120 . This process may be performed before or after the insulation member bending step (S33). In the drawing, the former case is illustrated.

At this time, between one side 331 of the insulating member 330 and the first vertical extending portion 331A and the first horizontal extending portion 331B and between the other side 332 and the second vertical extending portion 332A and the second horizontal extending

portion

331B, 331B, 332A, and 332B can be more easily bent in an intended shape if grooves are formed between the

protrusions

331A, 331B, 332A, and 332B.

According to this, since the area where the insulating member 330 is attached is widened, the adhesion force of the insulating member 330 can be improved. On the other hand, since the area covered by the first battery cell 110 and the second battery cell 120 is widened, the insulation between the first battery cell 110 and the second battery cell 120 can be ensured more reliably So that the assemblability can be improved.

FIG. 11 illustrates a step of attaching an insulation member (S42) in a method of manufacturing a battery module according to still another embodiment of the present invention, and FIG. 12 illustrates a method of manufacturing a battery module according to still another embodiment of the present invention, (S43). 13 is a perspective view of a battery module 400 according to another embodiment of the present invention.

The first battery cell 110, the second battery cell 120, and the third battery cell 440 are prepared in the battery cell placement step S41 of the method of manufacturing the battery module according to another embodiment of the present invention, The first battery cell 110 and the third battery cell 440 are disposed adjacent to the second battery cell 120 on opposite sides of the second battery cell 120, respectively.

The first insulating member 450 and the second insulating member 460 are prepared so that the first insulating member 450 is electrically connected to the first battery cell 110 and the second battery cell 120 And the second insulating member 460 is attached to the other surface 125 opposite to the one surface 122 of the second battery cell 120 and the other surface 125 opposite to the one surface 122 of the second battery cell 120, 3 of the first battery cell 440 and the other side 441 of the second battery cell 120 adjacent to the other side of the second battery cell 120 in the horizontal direction. 12, if the first insulating member 150 is attached to the upper portions of the first battery cell 110 and the second battery cell 120, the second insulating member 160 may be connected to the second battery cell 120 And the third battery cell 440, respectively.

Finally, in the insulation member bending step (S43), the first insulating member 450 is bent in the shape of a letter while the lower portions of the first battery cell 110 and the second battery cell 120 are opened, The second insulating member 460 is bent in a Λ shape while the upper portions of the first battery cell 120 and the third battery cell 440 are opened.

13, the first battery cell 110, the second battery cell 120, and the third battery cell 440 are adjacent to each other in parallel to each other, The first battery cell 450 is disposed between the first battery cell 110 and the second battery cell 120 so that one side 451 is attached to one side 112 of the first battery cell 110 and the other side 452 is connected to the second side The first battery cell 110 and the second battery cell 120 are attached to one surface 122 of the battery cell 120 so as not to directly contact each other. A second insulating member 460 is disposed between the second battery cell 120 and the third battery cell 440 so that one side 461 is attached to the other surface 125 of the second battery cell 120 and the other side 462 are attached to one surface 441 of the third battery cell 440 so that the second battery cell 120 and the third battery cell 440 are isolated from each other without directly contacting each other.

At this time, as shown in an enlarged view of the left part of FIG. 7, a region corresponding to a folding line of the first insulating member 450 is divided into a plurality of regions adjacent to the first battery cell 110 And is substantially coplanar with one surface 123. The area corresponding to the folding line of the second insulating member 460 is formed so as to cover one surface 124 opposite to the surface 123 of the second battery cell 120 and a substantial And are on the same plane.

According to this, three or more battery cells are arranged in a line at a time, and an insulating member can be easily installed between the battery cells. If a fourth battery cell, a fifth battery cell, or the like is further disposed adjacent to the third battery cell 440, a third insulating member may be attached to the upper portions of the third battery cell 440 and the fourth battery cell, The fourth insulating member is attached to the lower part of the cell and the fifth battery cell so that the first insulating member 450 and the third insulating member are bent in the shape of a letter and the second insulating member 460 and the fourth insulating member are bent It will be able to finish by bending in form.

The present invention is not limited to the above-described embodiment, and various modifications may be made without departing from the gist of the present invention as claimed in the following claims. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100, 200, 300, 400: Battery module

110: first battery cell

120: second battery cell

130, 230, 330: insulating member

331A: first vertical extension

331B: first horizontal extension

332A: a second vertical extension

332B: a second horizontal extension

440: Third battery cell

450: first insulating member

460: second insulating member

Claims

The first battery cell,

A second battery cell disposed adjacent to the first battery cell;

The first battery cell and the second battery cell being formed of an insulating material and being formed in a plate shape and being bent along an arbitrary folding line and being disposed between the first battery cell and the second battery cell, And the other side is attached to the second battery cell.
The method according to claim 1,

Wherein a fold line of the first insulating member is disposed on the same plane as one side of the first battery cell and the second battery cell which are adjacent to each other in parallel.
The method according to claim 1,

Wherein one side of the first insulating member has an area corresponding to one surface of the first battery cell facing the second battery cell or one surface of the second battery cell facing the first battery cell.
The method of claim 3,

Further comprising an extension extending from one side of the first insulation member to one side of the first insulation member and attached to the other side adjacent to one side of the first battery cell.
The method according to claim 1,

A third battery cell disposed adjacent to the second battery cell on the opposite side of the first battery cell with respect to the second battery cell,

Wherein the first battery cell is formed of an insulating material and is formed in a plate shape and is bent along an arbitrary folding line and disposed between the second battery cell and the third battery cell, And the other side is attached to the third battery cell.
6. The method of claim 5,

Wherein a folding line of the first insulating member is disposed on the same plane as one side of the second battery cells adjacent to the first battery cell in parallel,

Wherein a fold line of the second insulating member is located on the same plane as the other surface opposite to the one surface of the second battery cell.
A battery cell disposing step of disposing a second battery cell adjacent to the first battery cell,

A step of attaching a plate-shaped first insulating member made of an insulating material to one side of the first battery cell and the second battery cell,

And bending the first insulating member along a boundary line between the first battery cell and the second battery cell.
8. The method of claim 7,

Wherein a groove is formed in the first insulating member along an area corresponding to the boundary line.
8. The method of claim 7,

Wherein the first insulating member is formed on one side of the first battery cell or on one side of the second battery cell on one side with respect to the boundary line.
10. The method of claim 9,

An extension extending from one side of the first insulating member to one side of the first battery cell is formed,

Further comprising the step of bending the extension portion and attaching the extended portion to another surface adjacent to one surface of the first battery cell.
8. The method of claim 7,

The third battery cell may be disposed adjacent to the second battery cell on the opposite side of the first battery cell with respect to the second battery cell,

In the attaching step, the other surface opposite to the one surface of the second battery cell and the other surface of the third battery cell adjacent to the other surface of the second battery cell are covered with a plate-like second insulating member Lt; / RTI >

And bending the second insulating member along a boundary line between the second battery cell and the third battery cell.