KR20150086452A - Battery cell and Battery module using the same - Google Patents

Abstract

Disclosed are a battery cell and a battery module using the same to extend the battery cell without limiting the number of the battery cells. A battery cell according to the present invention includes a main body, at least one rail, and at least one rail groove which is formed on one side of the main body where the rail is not installed. A cooling material is open to the outside in the rail. A closed cooling hole is formed in a region except the cooling material. The width of the rail is proportional to the width of a side where the rail is installed. The width of the cooling hole is proportional to the width of a rail where a corresponding cooling hole is installed.

Description

[0001] The present invention relates to a battery cell and a battery module using the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery cell and a battery module using the same. More particularly, the present invention relates to a battery cell used for voltage expansion or current amount expansion and a battery module using the same.

In recent years, interest in secondary batteries has been rapidly increasing due to economic advantages and environmental advantages. Secondary cells store external electrical energy in the form of chemical energy and produce electricity when needed. Recently, the application range of electric vehicles has been expanding. The secondary battery is formed of at least one battery cell. The secondary battery is electrically connected to a plurality of battery cells according to the use environment and the purpose of use, thereby expanding the voltage or increasing the amount of current. At this time, a plurality of electrically connected battery cells must be firmly supported to maintain an electrically connected state.

A technique for electrically connecting a plurality of battery cells and firmly supporting a plurality of battery cells is disclosed in Korean Patent Laid-Open Publication No. 2012-0051237, "Battery Module Case". The patent includes upper, lower, and side detachable cases, so that a plurality of battery cells can be stably supported by the case.

However, if a separate case for supporting a plurality of battery cells is constructed as in the above-mentioned patent, there is a problem as follows.

First, since the number of battery cells to be fastened inside the case is limited, the expansion of the battery cells is limited.

Secondly, there is a problem in that the weight, outer shape, etc. of the entire battery module constituted by a plurality of battery cells become larger than necessary.

Third, the manufacturing cost of the battery module is increased.

Korean Public Patent No. 2012-0051237 (published on June 29, 2002)

A first object of the present invention is to provide a battery cell and a battery module using the same, which are capable of extending the battery cell without being limited by the number of battery cells.

A second object of the present invention is to provide a battery cell for manufacturing a slim battery module and a battery module using the same.

It is a third object of the present invention to provide a battery cell and a battery module using the same that can reduce manufacturing costs.

The battery cell according to the present invention includes a main body, at least one rail installed on the main body, and at least one rail groove formed on the other surface of the main body to which the rail is not provided, And the cooling holes are formed in a width that is proportional to the width of the surface on which the rails are installed and the cooling holes are formed in the cooling holes Is formed with a width of a width proportional to the width of the rail.

The rail may have a cross section that is gradually enlarged toward the outer side of the main body, and the rail groove may have a cross section that gradually expands inward of the main body.

According to another aspect of the present invention, there is provided a battery module including at least one first rail installed on a first body, and at least one first rail groove formed on the other surface of the first body, At least one second rail installed on one battery cell and the second body and a second battery cell having at least one second rail groove formed on the other side of the second body without the second rail Wherein the first rail is slid along the second rail groove or the second rail is slid into the first rail groove to fasten the first battery cell and the second battery cell, And a cooling hole is formed in the second rail to open the refrigerant passage to the outside and the surfaces other than the refrigerant passage to be closed. The first and second rails are proportional to the width of the surface on which the corresponding rail is provided, Width Is formed to a width, wherein the cooling hole is formed to a width of the width relative to the width of the rail that the width of the cooling hole installation.

Wherein the first rail and the second rail have a cross section that gradually expands in the outer direction of the first body and the second body, and the first rail groove and the second rail groove are formed in the first body and the second body, And may have a cross-section that gradually expands inward of the body.

Wherein the battery module is disposed between the first rail and the second rail groove such that the slide movement of the first battery cell or the second battery cell is stopped at an alignment position of the first battery cell and the second battery cell, And an alignment unit provided between the second rail and the first rail groove.

Wherein the alignment unit includes an alignment groove formed in any one of the first rail and the second rail groove and the second rail and the first rail groove and the first rail and the second rail, And a stopper provided on the other of the two rail grooves and on the other of the second rail and the first rail groove.

The stopper may further include a ball provided on the other of the first and second rail grooves and the second rail and the first rail groove on which the alignment groove is not formed, and an elastic body for elastically supporting the ball .

Wherein the stopper is provided on the other one of the first rail and the second rail groove on which the alignment groove is not formed and the other of the second rail and the first rail groove, And may be a leaf spring formed.

The stopper may further include a first battery cell extended from the leaf spring and fastened at an alignment position, and a lead exposed to the outside of the second battery cell.

The battery cell according to the present invention and the battery module using the same have the effect of expanding the number of battery cells without being limited by the number of battery cells.

Also, the battery cell according to the present invention and the battery module using the battery cell have the effect of manufacturing a slim battery module.

In addition, the battery cell according to the present invention and the battery module using the same have the effect of reducing the manufacturing cost of the battery module.

1 is a view showing a battery module according to a first embodiment.
2 is a view showing an expanded state of the battery module according to the first embodiment.
FIG. 3 is a view showing an arrangement of a battery module according to the first embodiment by enlarging the "I" portion shown in FIG.
FIG. 4 is a view showing an arrangement of a battery module according to the second embodiment by enlarging the "I" portion shown in FIG.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only examples of the present invention, and are not intended to represent all of the technical ideas of the present invention, so that various equivalents and modifications may be made thereto .

FIG. 1 is a perspective view showing a battery module according to a first embodiment, and FIG. 2 is a plan view showing a battery module according to a first embodiment.

Referring to FIGS. 1 and 2, a battery module 10 according to the present embodiment includes a first battery cell 100 and a second battery cell 200.

Although not shown, the first battery cell 100 and the second battery cell 200 may be provided with a cathode, an anode, a separator, and an electrolyte in the interior of the body. The internal structure of such a battery cell is well known in the art, and a detailed description thereof will be omitted.

The first battery cell (100) includes a first body (110). The first body 110 is a rectangular enclosure. That is, the first body 110 includes first, second, third, and fourth faces 111, 112, 113, and 114 forming a side face, a fifth face 115 forming a top face, And includes six sides (116). A first rail 120 is installed on the first surface 111 and a second surface 112 adjacent to the first surface 111. A first rail groove 130 is formed on a third surface 113 adjacent to the second surface 112 and a fourth surface 114 adjacent to the third surface 113.

The second battery cell 200 has the same shape and configuration as those of the first battery cell 100 described above, and a detailed description thereof will be omitted. A second rail 220 is provided on the first surface 211 and the second surface 212 of the second battery cell 200 and the third surface 213 of the second battery cell 200 and the And a second rail groove 230 is formed in the surface 214, respectively.

The first and second battery cells 100 and 200 are slid along the second rail groove 230 or the first rail 120 is slid along the first rail groove 130, And can be fastened to each other.

The first and second battery cells 100 and 200 may be separated from each other in the thickness direction of the first rail 120 and the thickness direction of the second rail 220. In this case, And the second rail 220 has a cross section that is gradually enlarged toward the outer side of the second body 210. As shown in FIG. The first rail groove 130 has a cross section that gradually increases inward of the first body 110 and the second rail groove 230 has a cross section that gradually expands inward of the second body 210 I have.

In addition, cooling holes 121 and 221, which are opened to the outside, may be formed in the first and second rails 120 and 220, respectively. The cooling holes 121 and 221 form a flow path of a fluid (for example, a coolant such as air or cooling gas) between the first battery cell 100 and the second battery cell 200, So that the first battery cell 100 and the second battery cell 200 are cooled.

As shown in FIGS. 1 and 2, the first rail 120 and the second rail 220 may be formed to have a width that is proportional to the width of the surface on which the corresponding rail is installed. That is, the first rail 120 and the second rail 220 are not formed to have a width of a whole width but may have different widths depending on the width of the surface on which the rail is installed. 1 and 2, a first rail 120 formed on a wide surface of a first battery cell 100 of the first rail 120 has a width (width) of a surface on which the first rail 120 is mounted The first rail 120 formed on the narrow width surface of the first battery cell 100 among the first rails 120 is formed on the surface of the first rail 120 on which the first rail 120 is mounted. It was formed with a narrow width according to the width.

The cooling holes 121 and 221 may be formed to have a width that is proportional to the width of the rails 120 and 220 on which the cooling holes 121 and 221 are provided. Since the rails 120 and 220 and the cooling holes 121 and 221 are formed to have a width that is proportional to the width of the surface on which the rail is installed, the first battery cell 100 and the second battery cell The fluid flows through the cooling holes 121 and 221 of the rails 120 and 220 provided on the surfaces of the first battery cell 100 and the second battery cell 200 when the fluid flows between the first battery cell 100 and the second battery cell 200, The first battery cell 100 and the second battery cell 200 can be effectively cooled.

The first battery cell 100 and the second battery cell 200 are aligned at the aligned positions and the first battery cell 100 or the second battery cell 200 is disposed at the aligned position, And further comprises an alignment unit 300 for preventing further slides.

FIG. 3 is a view showing an arrangement of a battery module according to the first embodiment by enlarging the "I" portion shown in FIG.

Referring to FIG. 3, the alignment unit 300 of the battery module according to the first embodiment includes alignment grooves 310 and a stopper 330. The alignment groove 310 is formed in the first rail groove 130. The stopper 330 is installed on the second rail 220. The stopper 330 may include a ball 331 and an elastic body 332. The ball 331 is maintained in rolling motion so that the ball 331 is not separated from the elastic body 332 from the elastic body 332 even when the first battery cell 100 and the second battery cell 200 are separated from each other, (Not shown).

As the second rail 220 is slid along the first rail groove 130, the stopper 330 is moved toward the alignment groove 310. At this time, the ball 331 is pressed by the first rail groove 130, and the elastic body 332 is compressed by the pressing force of the first rail groove 130.

The second rail 220 is slid along the first rail groove 130 and the first battery cell 100 and the second battery cell 200 reach the alignment position, The ball 331 is inserted into the alignment groove 310. Accordingly, the first battery cell 100 and the second battery cell 200 are no longer slid and can be firmly fastened at the alignment position.

When the first battery cell 100 and the second battery cell 200 are separated from each other, the ball 331 is aligned by the pressing force of the operator to press the first battery cell 100 or the second battery cell 200, The first battery cell 100 and the second battery cell 200 can be separated smoothly from the groove 310.

FIG. 4 is a view showing an arrangement of a battery module according to the second embodiment by enlarging the "I" portion shown in FIG.

Referring to FIG. 4, the aligning part 400 of the battery module according to the second embodiment includes an alignment groove 410 and a stopper 430. The alignment groove 410 is formed in the first rail groove 130. The stopper 430 is installed on the second rail 220. The stopper 430 may be a leaf spring. The stopper 430 is composed of a fixing portion 431 installed in the second rail 220 and an elastic portion 432 bent from the fixing portion 431 toward the first rail groove 130, 432 may be formed with a convex portion 433 protruding toward the first rail groove 130. The stopper 430 includes a first battery cell 100 extended from the convex portion 433 and fastened at the alignment position and a lead 434 exposed to the outside of the second battery cell 200 .

As the second rail 220 is slid along the first rail groove 130, the stopper 430 is moved toward the aligning portion 410. The elastic portion 432 and the convex portion 433 are pressed by the first rail groove 130 and compressed toward the fixing portion 431 by the pressing force of the first rail groove 130.

The second rail 220 is slid along the first rail groove 130 and the first battery cell 100 and the second battery cell 200 reach the alignment position, The raised convex portion 433 is inserted into the alignment groove 410. Accordingly, the first battery cell 100 and the second battery cell 200 are no longer slid and can be firmly fastened at the alignment position.

When the first battery cell 100 and the second battery cell 200 are separated from each other, when the operator presses the lead 434, the convex portion 433 is separated from the alignment groove 410, The first battery cell 100 and the second battery cell 200 can be separated smoothly.

Although the alignment grooves 310 and 410 are formed in the first rail groove 130 and the stoppers 330 and 430 are formed in the second rail 220 in the above description, Is formed in one of the first rail 120 and the second rail groove 230 and the second rail 220 and the first rail groove 130. The stoppers 330 and 430 are formed in the alignment groove One of the first rail 120 and the second rail groove 230 may be installed in the other of the second rail 220 and the first rail groove 130.

As described above, the first battery cell 100 and the second battery cell 200 can be firmly held in the alignment position by the alignment unit 300 firmly.

5, the remaining first rail 120 or the remaining first rail groove 130 of the first battery cell 100, the remaining second rail 220 of the second battery cell 200, A battery cell having the same structure as that of the first battery cell 100 or the second battery cell 200 may be further fastened to at least one of the remaining second rail grooves 230.

Therefore, the battery cell and the battery module using the same according to the present invention are not limited to the number of the battery cells, and the battery cell can be expanded, and the slim battery module can be manufactured at a low manufacturing cost.

The embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and those skilled in the art will be able to modify the technical idea of the present invention in various forms. Accordingly, such improvements and modifications will fall within the scope of the present invention as long as they are obvious to those skilled in the art.

10: Battery module
100: first battery cell 110: first body
120: first rail 130: first rail groove
200: second battery cell 210: second body
220: second rail 230: second rail groove
300, 400: alignment part 310, 410: alignment groove
330, 310: Stopper

Claims (9)

main body;
At least one rail installed in the body; and
And at least one rail groove formed on the other surface of the main body on which the rail is not installed,
A cooling hole is formed in the rail for opening the refrigerant passage to the outside and closing the surface other than the refrigerant passage,
The rail is formed to have a width that is proportional to the width of the surface on which the rail is installed,
Wherein the cooling holes are formed in a width of a width proportional to a width of a rail on which the cooling holes are installed.
The method according to claim 1,
Wherein the rail has a cross-section that gradually increases in an outward direction of the main body,
Wherein the rail groove has a cross section that gradually increases inward of the main body.
A first battery cell having at least one first rail installed on the first body and at least one first rail groove formed on the other surface of the first body without the first rail;
And a second battery cell having at least one second rail installed on the second body and at least one second rail groove formed on the other surface of the second body without the second rail,
The first rail is slid along the second rail groove or the second rail is slid into the first rail groove to fasten the first battery cell and the second battery cell,
Wherein the first rail and the second rail are formed with cooling holes through which refrigerant flow paths are opened to the outside and surfaces other than the refrigerant flow paths are closed,
The first rail and the second rail are each formed to have a width of a width proportional to the width of the surface on which the corresponding rail is installed,
Wherein the cooling hole is formed to have a width that is in proportion to a width of a rail on which the cooling hole is installed.
The method of claim 3,
Wherein the first rail and the second rail have a cross section that gradually expands in the outer direction of the first body and the second body,
Wherein the first rail groove and the second rail groove have a cross section that gradually expands inward of the first body and the second body.
The method of claim 3,
The first and second battery cells are arranged such that the slide movement of the first battery cell or the second battery cell is stopped at an alignment position of the first battery cell and the second battery cell, And an aligning portion provided between the first rail groove and the first rail groove.
6. The apparatus of claim 5,
An alignment groove formed in any one of the first rail and the second rail groove and the second rail and the first rail groove;
And a stopper installed on the other of the first and second rail grooves and the second rail and the first rail groove on which the alignment groove is not formed.
7. The apparatus according to claim 6, wherein the stopper
A ball provided on the other one of the first rail and the second rail groove on which the alignment groove is not formed and the other of the second rail and the first rail groove;
And an elastic body for elastically supporting the ball.
7. The apparatus according to claim 6, wherein the stopper
Wherein the first and second rail grooves are formed in the other one of the first and second rail grooves and the second rail and the first rail groove in which the alignment groove is not formed, Wherein the battery module is a spring.
9. The apparatus according to claim 8, wherein the stopper
And a lead extending from the leaf spring and exposed to the outside of the first battery cell and the second battery cell fastened at the alignment position.

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