KR20180069254A - Tray Having Stopper for Accommodating Battery Cell - Google Patents

Abstract

As a tray for receiving a battery cell, capable of receiving the battery cell, the present invention provides the tray for receiving a battery cell, which includes: a body plate composed of a plate-shaped frame; at least one or more receiving grooves formed to be recessed downwardly from the body plate to receive the battery cell; and at least one or more stoppers protruding from an inner surface of one side of the receiving groove and pressing one side of the battery cell so that the received battery cell is not moved. Accordingly, the present invention can prevent the outer appearance of the battery cell from being damaged.

Description

(Tray Having Stopper for Accommodating Battery Cell)

The present invention relates to a battery cell receiving tray including a stopper.

Due to the rapid increase in the use of fossil fuels, the demand for the use of alternative energy or clean energy is increasing. As a part of this, the most active field of research is electric power generation and storage.

At present, a typical example of an electrochemical device utilizing such electrochemical energy is a secondary battery, and the use area thereof is gradually increasing.

In particular, as interest in environmental issues grows, research on electric vehicles and hybrid electric vehicles that can replace fossil fuel-based vehicles such as gasoline vehicles and diesel vehicles, which are one of the major causes of air pollution, Such a lithium secondary battery is also used as a power source for such electric vehicles and hybrid electric vehicles.

Typically, there is a high demand for a prismatic secondary battery and a pouch-type secondary battery which can be applied to products requiring a thin thickness and a high density of energy to be stored in a narrow space, There is a high demand for lithium secondary batteries, such as lithium ion batteries and lithium ion polymer batteries, which have advantages of voltage and output stability.

The secondary battery may be classified according to how the electrode assembly having the anode / separator / cathode structure is formed. Typically, the jelly-roll having the structure in which the anode and the cathode are wrapped with the separator interposed therebetween, (Stacked) electrode assembly in which a plurality of positive electrodes and negative electrodes cut in units of a predetermined size are sequentially stacked with a separator interposed therebetween, a stacked (stacked) electrode assembly in which a predetermined unit of positive and negative electrodes are stacked A stack / folding type electrode assembly having a structure in which a Bi-cell or a full cell stacked with a capacitor is wound.

Recently, a pouch-shaped battery having a structure in which a stacked or stacked / folded electrode assembly is embedded in a pouch-shaped battery case of an aluminum laminate sheet is attracting much attention due to low manufacturing cost, small weight, and easy shape deformation Its usage is also gradually increasing.

FIG. 1 schematically shows an exploded perspective view showing a general structure of a typical conventional pouch-shaped battery cell.

1, the pouch-shaped battery cell 10 includes a stacked electrode assembly 20 in which a plurality of electrode tabs 21 and 22 are protruded, and a pair of electrode tabs 21 and 22 connected to the electrode tabs 21 and 22, The electrode leads 30 and 31 and the battery case 40 having a structure in which the stacked electrode assembly 20 is received and sealed such that a part of the electrode leads 30 and 31 are exposed to the outside .

The battery case 40 also includes a lower case 42 including a concave shaped receiving portion 41 into which the stacked electrode assembly 20 can be seated and a lower case 42 as a cover of such a lower case 42, And an upper case 43 for sealing the upper case 20. The upper case 43 and the lower case 42 heat seal and seal the outer circumferential surface of the battery case 40 with the stacked electrode assembly 20 built therein.

Thus, the pouch type battery cell can be processed into various forms with a high energy density. In recent years, it is easy to diversify automobile designs and is used in automobile batteries.

However, since the pouch-shaped battery cell applied to the automobile battery is relatively large and has a high weight, it is difficult to store and store the battery cell in a vacuum forming tray used for storing and packaging the battery cell.

2 is a schematic plan view showing a tray for accommodating a plurality of battery cells of the prior art.

2, the tray 50 of the prior art has receiving grooves 52 for receiving a plurality of battery cells 10. The receiving grooves 52 are formed on the outer surface of the battery cell 10, And the inner surface was formed in a shape corresponding to that of FIG. However, the battery cell 10 accommodated in the tray 50 of the prior art has a sealing portion 16 in which the electrode terminal 11 of the battery cell 10 is formed and a receiving groove The inner surface of the battery case 12 is exposed and the sealing portion 16 is folded to cause defects. there was.

Meanwhile, another type of prior art tray for accommodating the battery cells has a receiving part for receiving the electrode assembly of the battery cell in a downward direction and accommodating the accommodating part in such a manner that the accommodating part is entirely enclosed . Such a housing part is fixed in the form of wrapping the receiving part of the battery cell, and there is a problem that the housing part is frequently damaged due to frequent friction with the housing part of the battery cell during loading or after conveying after loading.

Therefore, there is a high need for technology development for solving the above problems.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art and the technical problems required from the past.

The inventors of the present application have conducted intensive research and various experiments. As will be described later, the battery cell storing tray of the present invention is formed by protruding from the inner surface of one side of the receiving groove of the body plate, It is possible to prevent the battery cells from being detached from the tray due to an external impact during the transportation of the battery cells stored in the tray, Thereby preventing folding or damage of the sealing portion due to impact or friction with the receiving portion. The present invention has been accomplished based on this finding.

According to an aspect of the present invention, there is provided a tray for accommodating a battery cell,

1. A tray for storing a battery cell,

A body plate made of a plate-shaped frame;

At least one receiving groove formed downwardly from the body plate to receive the battery cell; And

At least one stopper protruding from an inner surface of one side of the receiving groove and pressing one side of the battery cell so that the accommodated battery cell does not flow;

And a control unit.

Therefore, the battery cell receiving tray according to the present invention includes at least one stopper protruding from the inner surface of one side of the receiving groove of the body plate and pressing one side of the battery cell so that the accommodated battery cell does not flow It is possible to prevent the battery cells from being detached from the tray due to an external impact during the transportation of the battery cells housed in the tray and to prevent the sealing portions from being folded or damaged due to impact or friction with the storage portion .

In one specific example, the battery cell may have a structure in which an electrode assembly having an anode, a cathode, and a separator interposed between the anode and the cathode is sealed in a receiving portion of the plate-shaped battery case.

In one specific example, the outer periphery of the battery case is a thermally fused sealing portion, and the both side sealing portions are vertically bent based on the direction in which the electrode terminals are protruded.

In one specific example, the stopper may be formed on the inner surface of one side of the receiving groove facing the upper sealing portion where the electrode terminal of the battery cell is located.

In addition, the stopper can press the outer wall of the accommodating portion of the battery case in which the electrode assembly of the battery cell is embedded, and presses the accommodating portion of the battery cells accommodated in the tray due to the structure of the stopper, thereby preventing the battery cell from flowing.

Specifically, the battery cell may be mounted in an insertion manner such that an upper sealing portion where the electrode terminal of the battery case is located is located below the stopper formed in the receiving groove of the body plate.

In addition, the stopper may be structured such that the stopper is spaced upward from the upper sealing portion where the electrode terminal of the battery cell is located with respect to the paper surface.

In one specific example,

A first stopper formed at a position deflected to one side with respect to a center of an upper sealing portion where an electrode terminal of the battery cell is located; And

And a second stopper formed at a position deflected toward the other side with respect to the center of the upper sealing part.

In one specific example, the body plate may be a plate of polymer resin or a porous elastomer. It is not necessarily limited to such a material but may be applied to materials used for general packaging materials.

In one specific example, the width of the stopper may be 10% to 50% based on the entire width of the battery cell. Specifically, when the width of the stopper is less than 10%, the width of the stopper is narrow, It is not suitable because it may cause damage to the battery cell. Conversely, if it exceeds 50%, the volume of the stopper becomes large and it becomes difficult to insert the battery cell into the receiving groove of the body plate.

In another specific example, a support plate may be formed at an end of the stopper to face a side wall of the accommodating portion of the battery cell. Specifically, the stopper may be in a 'T' shape in a plan view.

In one specific example, the receiving groove may be formed with a partition for partitioning between the electrode terminals of the battery cell to prevent short-circuiting between the electrode terminals of the battery cell.

In one specific example, the battery cell receiving tray may include a structure in which another battery cell receiving tray is stacked on top of one battery cell receiving tray with respect to the paper surface.

Hereinafter, the configurations of the electrode assembly housed in the battery cell will be described in detail.

The anode may be prepared, for example, by coating a mixture of a cathode active material, a conductive material and a binder on a cathode current collector, followed by drying. If necessary, a filler may be further added to the mixture.

The cathode active material is a material capable of causing an electrochemical reaction. Examples of the lithium transition metal oxide include lithium cobalt oxide (LiCoO ₂ ) containing two or more transition metals and substituted with one or more transition metals, lithium Layered compounds such as nickel oxide (LiNiO ₂ ); Lithium manganese oxide substituted with one or more transition metals; Formula _{LiNi 1-y M y O 2} ( where, M = Co, Mn, Al , Cu, Fe, Mg, B, Cr, Zn or Ga and Lim, 0.01≤y≤0.7 include one or more elements of the element) A lithium nickel-based oxide represented by the following formula: _{Li 1 + z Ni 1/3 Co 1/3} Mn 1/3 O 2, Li 1 + z Ni 0.4 Mn 0.4 Co 0.2 O 2 , such as _{Li 1 + z Ni b Mn c} Co 1- (b + c + d _{) M d O (2-e} ) A e ( where, -0.5≤z≤0.5, 0.1≤b≤0.8, 0.1≤c≤0.8, 0≤d≤0.2 , 0≤e≤0.2, b + c + d <1, M = Al, Mg, Cr, Ti, Si or Y, and A = F, P or Cl; lithium nickel cobalt manganese composite oxide; And the formula _{Li 1 + x M 1-y} M 'y PO 4-z X z ( wherein, M = a transition metal, preferably Fe, Mn, Co or Ni, M' = Al, Mg or Ti, X = F, S or N, and -0.5? X? +0.5, 0? Y? 0.5, and 0? Z? 0.1), but the present invention is not limited thereto.

The conductive material is usually added in an amount of 1 to 20 wt% based on the total weight of the mixture including the cathode active material. Such a conductive material is not particularly limited as long as it has electrical conductivity without causing chemical changes in the battery, for example, graphite such as natural graphite or artificial graphite; Carbon black such as carbon black, acetylene black, ketjen black, channel black, furnace black, lamp black, and summer black; Conductive fibers such as carbon fiber and metal fiber; Metal powders such as carbon fluoride, aluminum, and nickel powder; Conductive whiskey such as zinc oxide and potassium titanate; Conductive metal oxides such as titanium oxide; Conductive materials such as polyphenylene derivatives and the like can be used.

The filler is optionally used as a component for suppressing the expansion of the anode, and is not particularly limited as long as it is a fibrous material without causing a chemical change in the battery. Examples of the filler include olefin polymers such as polyethylene and polypropylene; Fibrous materials such as glass fibers and carbon fibers are used.

Further, the negative electrode is prepared, for example, by coating a negative electrode current collector with a mixture of a negative electrode active material, a conductive material and a binder, and drying the mixture. Optionally, a filler may be further added to the mixture. The negative electrode active material may be at least one selected from the group consisting of graphite carbon, coke carbon, and hard carbon.

Since the configurations of the battery cells described above are well known in the art, a detailed description thereof will be omitted herein.

As described above, the battery cell receiving tray according to the present invention includes at least one stopper protruding from the inner surface of one side of the receiving groove of the body plate and pressing one side of the battery cell so that the accommodated battery cell does not flow It is possible to prevent the battery cells from being detached from the tray due to an external impact while the battery cells housed in the tray are being transported and to prevent the folding of the sealing portion caused by the collision of the battery cells with the receiving portion And the effect of preventing appearance damage of the battery cell is exhibited.

1 is an exploded perspective view showing a general structure of a typical pouch type secondary battery of the related art;
2 is a plan view showing a general structure of a conventional tray for accommodating a conventional battery cell;
3 is a schematic plan view and a partial enlarged view of a battery cell receiving tray in which a battery cell according to an embodiment of the present invention is housed;
4 is a schematic cross-sectional view taken along line A-A 'of the battery cell receiving tray in which the battery cell of FIG. 3 is housed;
FIG. 5 is a schematic cross-sectional view taken along the line B-B 'in FIG. 3 showing a battery cell receiving tray accommodating therein the battery cells; FIG.
6 is a schematic cross-sectional view taken along line C-C 'of a tray for storing a battery cell in which the battery cell of FIG. 3 is housed;
7 is a schematic plan view showing a battery cell receiving tray in which a battery cell according to another embodiment of the present invention is housed.

Hereinafter, the contents of the present invention will be described in detail with reference to the drawings, but the scope of the present invention is not limited thereto.

3 is a schematic plan view and a partial enlarged view showing a battery cell receiving tray 100 in which a battery cell 200 according to an embodiment of the present invention is housed. Sectional view showing a cross section taken along the line A-A 'of the tray for accommodating a battery cell accommodated therein.

3 and 4, a tray 100 for storing a battery cell according to the present invention includes a body plate 110 formed of a plate-shaped frame, a body plate 110 extending downward from the body plate 110 to accommodate the battery cell 200, And at least one receiving groove 152 formed to protrude from one side of the receiving groove 152 and stoppers (not shown) for pressing one side of the battery cell 200 to prevent the battery cell 200, 121, and 122, respectively.

That is, the first stopper 121 formed at a position deflected to one side with respect to the center of the upper sealing portion where the electrode terminal 212 of the battery cell 200 is located, and a second stopper 121 formed at the center of the upper sealing portion, A second stopper 122 formed at a position deflected toward the other side is formed.

At this time, the battery cell 200 has a structure in which an electrode assembly (not shown) having an anode, a cathode, and a separator interposed between the anode and the cathode is sealed in the accommodating portion 226 of the plate-shaped battery case 225 .

The outer periphery of the battery case 225 of the battery cell 200 is formed as a sealing part 216 that is thermally fused to the battery case 200. As shown in FIG. 4, And the portions 231 and 232 are vertically bent.

In addition, the body plate 110 is a plate of polymer resin or a porous elastic body.

The width W ₂ of the stopper 121 is 10% to 50% based on the entire width W ₁ of the battery cell 200.

5 is a schematic cross-sectional view taken along the line B-B 'of the tray for storing the battery cells in which the battery cells of FIG. 3 are housed.

3 and 5, the stoppers 121 and 122 are formed on one side of the receiving groove 152 facing the upper sealing portion 216 where the electrode terminals 211 and 212 of the battery cell 200 are located, Is formed on the inner surface (153).

The stoppers 121 and 122 can press the outer wall of the accommodating portion 226 of the battery case 225 in which the electrode assembly (not shown) of the battery cell 200 is housed. The battery cell 200 can be prevented from flowing due to the structure of the battery 100 by pressing the accommodating portion 226 of the battery cells 200 stored in the tray 100.

The battery cell 200 has an upper sealing portion 216 in which the electrode terminal 212 of the battery case 225 is located is connected to the stopper 121 or 122 formed in the receiving groove 152 of the body plate 110 And is mounted in an insertion manner so as to be positioned at a lower portion.

The stoppers 121 and 122 are spaced upward from the upper sealing portion 216 where the electrode terminals 212 of the battery cell 200 are positioned with respect to the ground.

6 is a schematic cross-sectional view taken along the line C-C 'of the tray for storing the battery cells in which the battery cells of FIG. 3 are housed.

3 and 6, in order to prevent a short circuit between the electrode terminals 211 and 212 of the battery cell 200, the receiving groove 152 is formed between the electrode terminals 212 of the battery cell 200 A partitioning portion 125 for partitioning is formed.

FIG. 7 is a schematic plan view showing a battery cell receiving tray in which a battery cell according to another embodiment of the present invention is housed.

Referring to FIG. 7, a support plate 127 is formed at an end of the stopper 125 to face a side wall of the accommodating portion 226 of the battery cell 200. At this time, the stoppers 125 and 126 are 'T' shaped in plan view.

As described above, the battery cell receiving tray according to the present invention includes at least one stopper protruding from the inner surface of one side of the receiving groove of the body plate and pressing one side of the battery cell so that the accommodated battery cell does not flow It is possible to prevent the battery cells from being detached from the tray due to an external impact while the battery cells housed in the tray are being transported and to prevent the folding of the sealing portion caused by the collision of the battery cells with the receiving portion And the effect of preventing appearance damage of the battery cell is exhibited.

Claims (14)

1. A tray for storing a battery cell,
A body plate made of a plate-shaped frame;
At least one receiving groove formed downwardly from the body plate to receive the battery cell; And
At least one stopper protruding from an inner surface of one side of the receiving groove and pressing one side of the battery cell so that the accommodated battery cell does not flow;
And a plurality of the battery cells. The battery cell storage tray according to claim 1, wherein the battery cell has an electrode assembly having a positive electrode, a negative electrode, and a separator interposed between the positive electrode and the negative electrode, the electrode assembly being sealed in a receiving portion of the plate-shaped battery case. The battery cell storage tray according to claim 2, wherein the outer periphery of the battery case is formed with a heat-sealed sealing portion, and both side sealing portions are vertically bent with respect to a direction in which the electrode terminals are protruded. The battery cell storage tray according to claim 3, wherein the stopper is formed on an inner surface of one side of the receiving groove facing the upper sealing portion where the electrode terminal of the battery cell is located. The tray for accommodating a battery cell according to claim 2, wherein the stopper presses the outer wall of the accommodating portion of the battery case in which the electrode assembly of the battery cell is embedded. 5. The battery cell storage tray according to claim 4, wherein the battery cell is mounted in an insertion manner such that an upper sealing portion where an electrode terminal of the battery case is located is positioned below a stopper formed in a receiving groove of the body plate. The tray for storing a battery cell according to claim 6, wherein the stopper is spaced upward from an upper sealing portion where an electrode terminal of the battery cell is located with respect to the ground. The connector according to claim 1,
A first stopper formed at a position deflected to one side with respect to a center of an upper sealing portion where an electrode terminal of the battery cell is located; And
A second stopper formed at a position deflected toward the other side with respect to a center of the upper sealing portion;
And a plurality of battery cells. The battery cell storage tray according to claim 1, wherein the body plate is a polymer resin plate or a porous elastic body. The battery cell storage tray according to claim 1, wherein the width of the stopper is 10% to 50% based on the entire width of the battery cell. The battery cell storage tray according to claim 1, wherein a support plate is formed at an end of the stopper to face a side wall of the accommodating portion of the battery cell. 12. The battery cell storage tray according to claim 11, wherein the stopper has a T shape in plan view. The battery cell according to claim 1, wherein the receiving groove is formed with a partition portion for partitioning between the electrode terminals of the battery cell to prevent short-circuiting between the electrode terminals of the battery cell. For tray. 2. The battery cell storage tray according to claim 1, wherein the battery cell receiving tray includes a structure in which another battery cell receiving tray is stacked on top of one battery cell receiving tray with respect to the paper surface, .

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