WO2010068006A2

WO2010068006A2 - Battery stack assembly

Info

Publication number: WO2010068006A2
Application number: PCT/KR2009/007292
Authority: WO
Inventors: 이정용
Original assignee: (주)레오모터스
Priority date: 2008-12-08
Filing date: 2009-12-08
Publication date: 2010-06-17
Also published as: WO2010068006A3

Abstract

The present invention relates to a battery stack assembly. The battery stack assembly according to the present invention comprises: a stack frame in which a plurality of battery cells are stacked; a box-shaped case which surrounds the stack frame and is equipped with air-permeable holes; and an air-inflow block. The upper end of the air-inflow block is connected to the outer lateral side of the case. A portion between the upper and lower ends of the air-inflow block is distanced from the outer lateral side of the case and forms a communication space that communicates with the hole. The lower end and the case are located under the through-hole. An air inlet communicating with the communication space is formed on the air-inflow block.

Description

Battery stack assembly

The present invention relates to a battery stack assembly employed in an automobile, and more particularly, it is possible to prevent water from approaching the battery cell, to suppress the contact of foreign matter to the battery cell, and to enhance the durability to prevent explosion accidents. The present invention relates to a battery stack assembly whose structure has been improved to provide a safety device that can minimize and further prevent explosion accidents.

1 is a perspective view of a battery stack assembly according to the prior art, and FIG. 2 is a II-II cross-sectional view of FIG. 1.

As shown in these figures, the battery stack assembly according to the prior art has a cylindrical case 101 and a casing 101 in which the stacked battery cells 103 are disposed therein and through holes 101a are formed. It is provided with a plurality of air inlet ribs 102 provided on the outer surface of the air inlet (102a) in communication with the through hole (101a).

Air introduced into the case 101 through the air inlet 102a of the air inlet rib 102 serves to cool the heat generated from the battery cell 103.

However, the battery stack assembly according to the related art having the configuration as described above has the following problems.

In other words, in recent years, development of electric vehicles has been actively conducted for the purpose of developing alternative energy and preventing environmental pollution. Such electric vehicles rotate motor wheels by driving a motor with electricity generated by a fuel cell. Meanwhile, the electricity generated by the fuel cell is stored in the battery cell 103.

As such, since the electric vehicle has an essential relationship with electricity, it should be designed to avoid contact with water as much as possible due to discharge or the like. In particular, in the case of frequent flooding, water may come into contact with the battery cell 103, causing problems such as the inability to use the electric vehicle.

However, the prior art is accompanied with the above problem, because the water is a structure that can easily contact the battery cell 103 through a plurality of air inlet ribs (102).

In addition, the problem that the manufacturing cost increases due to the complexity of the structure by forming the plurality of air inlet ribs 102 and the battery cell 103 because foreign matter contained in the air is easily contacted with the battery cell 103 without filtration. There is a problem that often follow-up management including cleaning of the).

On the other hand, the plurality of battery cells 103 has a positive electrode and a negative electrode, respectively, and are individually coupled to match the polarity of the laminated frame (F) disposed inside the case 101. According to such a lamination structure, the time required for the lamination is unnecessarily increased, thereby degrading the efficiency of lamination work.

Then, the pressure inside the case 101 is increased by the heat generated from the battery cell 103. When the flow of air through the air inlet ribs 102 is not made smoothly, the case When the inside of the 101 is in a high temperature and high pressure state, the cooling of the heat is not made smoothly, there is a problem that the performance of the product is degraded, when the flow of air through the air inlet ribs 102 is broken, The battery cell 103 is exploded, there is a problem that an accident occurs.

The present invention has been made to solve the above problems, it is an object of the present invention to provide a battery stack assembly that can prevent the contact between water and the battery cell and suppress the inflow of foreign matter contained in the air.

Another object of the present invention is to provide a battery stack assembly capable of easily stacking battery cells.

Still another object of the present invention is to provide a battery stack assembly capable of minimizing damage caused by explosion of a battery cell due to an increase in pressure caused by heat generated from the battery cell.

It is still another object of the present invention to provide a battery stack assembly provided with a safety device to prevent the battery cell from being exploded due to an increase in pressure caused by heat generated from the battery cell.

The present invention for achieving the above object is a laminated frame in which a plurality of battery cells are stacked; A cylindrical case surrounding the laminated frame and having a through hole through which air can be introduced; And an upper end connected to an outer side of the case, and a portion between the upper end and the lower end is spaced apart from the outer side of the case to form a communication space communicating with the through hole, and the lower end is located below the through hole together with the case. And an air inlet block for forming an air inlet opening to the communication space.

It is preferable to further include an air purification filter detachably installed on the air inflow block and disposed on an air flow path in the communication space.

Each of the battery cells may include: a positive electrode portion protruding from a positive electrode terminal; A negative electrode portion protruding a negative electrode terminal; And an insulating portion formed between the positive electrode portion and the negative electrode portion and insulated from the positive electrode portion and the negative electrode portion, the battery cells positioned at the lower side of the battery cell positioned at the upper side from the upper side to the lower side. By the method of seating, it is preferable that the battery cells are configured to be stacked.

The present invention for achieving the above object is a laminated frame in which a plurality of battery cells are stacked; A case surrounding the laminated frame such that the battery cells are disposed therein, and an air circulation through-hole configured to enable air circulation between the inside and the outside; And carbon nanotubes coated on the case to reinforce the strength of the case.

The carbon nanotubes are preferably coated on the inner surface of the case and the outer surface of the case, respectively.

The case has a pressure adjusting hole penetrating the inner surface and the outer surface of the case so as to prevent the explosion of the battery cell due to the pressure rise inside the case, the pressure in accordance with the pressure change inside the case It is preferable to have a pressure adjusting stopper coupled to the case so as to close and open the adjusting hole.

The following effects are expected in the battery stack assembly according to the present invention having the configuration as described above.

In other words, the present invention includes a case in which the battery cell is disposed inside and an air inflow block for relatively increasing air pressure in the case, thereby preventing water from approaching the battery cell. .

In addition, an embodiment of the present invention is remarkably inconvenient to frequently clean the battery cell directly by contacting the battery cell in the air removal filter is detachably installed in the air inlet block to contact the battery cell with the foreign matter removed. It can be removed.

In addition, an embodiment of the present invention is formed by the insulating portion is insulated stepped to insulate the positive electrode portion and the negative electrode portion, the positive electrode terminal is protruded on the positive electrode portion and the negative electrode terminal is formed to protrude, thereby increasing the efficiency of the stacking operation of the battery cell There is also an effect.

1 is a perspective view of a battery stack assembly according to the prior art.

FIG. 2 is a II-II cross-sectional view of FIG. 1. FIG.

3 is a perspective view of a battery stack assembly according to an embodiment of the present invention.

4 is a sectional view taken along the line III-III of FIG. 3;

* Description of the symbols for the main parts of the drawings *

1: Case 11: Through-through

2: Air inflow block 21: Communication space

22: Air inlet 23, 24: Insertion rib

3: battery cell 31: positive electrode

311: positive electrode terminal 32: negative electrode

33: insulator 321: negative electrode terminal

F: laminated frame

Hereinafter, a battery stack assembly according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is a perspective view of a battery stack assembly according to an exemplary embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along line III-III of FIG. 3.

As shown in these figures, the battery stack assembly according to the present invention comprises a laminated frame (F), a case (1) and an air inlet block (2).

A plurality of battery cells 3 are stacked in the stacked frame F. In the present embodiment, each of the battery cells 3 includes a positive electrode part 31, a negative electrode part 32, and an insulating part 33. A positive electrode terminal 311 protrudes from the positive electrode portion 31, a negative electrode terminal 321 protrudes from the negative electrode portion 32, and the insulating portion 33 includes the positive electrode portion 31 and the negative electrode portion 32. ) Is formed to step between the anode portion 31 and the cathode portion 32.

As described above, the insulation part 33 is formed to be stepped, and due to the protrusion of the positive electrode terminal 311 and the negative electrode terminal 321, the stacking of each battery cell 3 can be easily performed. That is, the positive electrode terminal of the battery cell 3 located on the lower side may be provided by simply seating the adjacent battery cell 3 to be positioned on the lower side in the direction from the upper side to the lower side. The positive electrode 31 of the battery cell 3 positioned on the upper side of the battery cell 3 is electrically connected to the 311 and similarly connected to the negative terminal 321 of the battery cell 3 positioned on the lower side and the battery cell 3 positioned on the upper side thereof. Since the negative electrode part 32 is electrically connected, there is no need to additionally perform the polarity connection of each battery cell 3.

The case 1 is disposed in a form surrounding the laminated frame F and has a cylindrical shape. The through hole 11 is formed in the case 1. The through hole 11 allows air introduced through the air inlet 22 to be described below to be introduced into the case 1.

The air inflow block (2) is provided as one unit on each side of the outer surface of the case 1, the upper end is connected to each outer surface of the case (1) and the lower end of the case (1) An air inlet 22 is formed to be spaced apart from each outer surface to allow air from the outside to flow therein. A portion between the upper end and the lower end of the air inlet block 2 is spaced apart from the outer surface of the case 1 to form a communication space 21 for communicating the air inlet 22 and the through hole 11.

The battery stack assembly having such a structure has relatively high pressure by allowing air introduced into the communication space 21 through the air inlet 22 to be introduced into the case 1 through the through hole 11. Air stays inside the case (1). Therefore, even when water is introduced into the air inlet 22 during flooding, the water is introduced into the case 1 through the through hole 11 by the air pressure inside the case 1. It can be prevented.

On the other hand, in this embodiment, the air purification filter is provided. The air purification filter is detachably coupled to the air inflow block (2). That is, the air inlet block 2 is provided with a pair of

insertion ribs

23 and 24 in which the

insertion ribs

23 and 24 are spaced up and down. The air purifying filter is slid from the outside to be seated on the

insertion ribs

23 and 24 so as to be coupled to the air inflow block 2 and easily separated from the air inflow block 2 through the reverse operation. Will be.

The air purification filter is disposed on the air flow path in the communication space 21 to serve to introduce the air in which the foreign matter is removed into the case (1).

As a result, according to the present embodiment in which the air purifying filter is provided, since only the air purifying filter can be replaced and managed periodically, it is possible to replace the management including the cleaning of the battery cell 3 and the like. It is possible to increase the efficiency of after-care of 3).

Hereinafter, a battery stack assembly according to another exemplary embodiment of the present invention will be described in detail with reference to FIGS. 5 to 6.

5 is a perspective view of a battery stack assembly according to an exemplary embodiment of the present invention, and FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 5.

As shown in these figures, the battery stack assembly according to the present invention comprises a laminated frame (F), a case (1) and carbon nanotubes (N).

The carbon nanotubes (N) are coated on the case 1 to reinforce the strength of the case 1. The carbon nanotube (N) is a tubular material in which hexagons made of carbon 6 are connected to each other, and may be coated only on any one of an inner surface of the case 1 and an outer surface of the case 1. However, in order to increase the effect of strength reinforcement, it is preferable that the inner surface of the case 1 and the outer surface of the case 1 are respectively coated.

In this embodiment in which the carbon nanotubes (N) are coated, even if the battery cell 3 explodes due to an abnormally high temperature / high pressure state inside the case 1, fragments due to destruction of the case 1. Has the advantage of minimizing the scattering of.

In the present embodiment, the case 1 is formed with a plurality of pressure adjusting holes 12. Each of the pressure adjusting holes 12 prevents the explosion of the battery cell due to the pressure increase inside the case 1 even when the air circulation through the air circulation through-hole 11 is not smoothly performed. To this end, it serves to allow the air inside the case 1 to be discharged to the outside.

The pressure adjusting hole 12 is selectively closed or opened by the pressure adjusting plug 5. That is, the pressure adjusting plug 5 closes the pressure adjusting hole 12 when the internal pressure of the case 1 is normally maintained, and the internal pressure of the case 1 is abnormally increased. In this case, the pressure is moved in the direction of opening the pressure adjusting hole 12 by the internal pressure.

As described above, according to the present embodiment, when the internal pressure of the case 1 is abnormally increased, the pressure control hole 12 and the pressure regulating plug 5 prevent the inadvertent side of the battery cell 3. There is an advantage to prevent explosion.

While the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments but is defined by the claims, and it is obvious that various modifications and adaptations can be made in the technical field to which the present invention belongs. Do.

Claims

A laminated frame in which a plurality of battery cells are stacked;

A cylindrical case surrounding the laminated frame and having a through hole through which air can be introduced; And

An upper end is connected to an outer side of the case and a portion between the upper end and the lower end is spaced apart from the outer side of the case to form a communication space communicating with the through hole, and the lower end is located below the through hole together with the case; And an air inlet block forming an air inlet opening to the communication space.
The method of claim 1,

And an air purification filter detachably installed on the air inflow block and disposed on an air flow path in the communication space.
The method of claim 1,

Each battery cell is:

An anode portion on which an anode terminal protrudes;

A negative electrode portion protruding a negative electrode terminal; And

It is formed to be stepped between the positive electrode portion and the negative electrode portion and provided with an insulating portion for insulating the positive electrode portion and the negative electrode portion,

A battery stack assembly, characterized in that the stacking of each battery cell is made by a method of seating an adjacent battery cell to be positioned in an upward direction from a lower side to a battery cell located at a lower side.
A laminated frame in which a plurality of battery cells are stacked;

A case surrounding the laminated frame such that the battery cells are disposed therein, and an air circulation through hole for allowing air circulation between the inside and the outside; And

To reinforce the strength of the case, the battery stack assembly comprising a; carbon nanotubes coated on the case.
The method of claim 4, wherein

The carbon nanotubes are coated on the inner surface of the case and the outer surface of the case, respectively, characterized in that the battery stack assembly.
The method of claim 4, wherein

The case is provided with a pressure adjusting hole penetrating the inner surface and the outer surface of the case so as to prevent the explosion of the battery cells due to the pressure rise inside the case,

And a pressure adjusting stopper coupled to the case so as to close and open the pressure adjusting hole according to a pressure change inside the case.