KR102075097B1 - Battery Unit Having Vibration Robustness - Google Patents

Abstract

The present invention discloses a battery unit in which a cell stack is wrapped in a cell case having a vibration preventing structure. The cell case includes an upper cover and a lower cover. The lower cover protrudes vertically from the bottom plate of the lower cover so as to contact the first and second corner regions on the left and right sides of the cell stack and the third and fourth corner regions on the left and right sides of the cell stack, respectively. It is provided with the 1st thru | or 4th close contact support with a hole. In addition, the upper cover includes first to fourth insertion rods protruding from the ceiling plate of the upper cover so as to be inserted into the holes of the first to fourth close support.

Description

Battery Unit Having Vibration Resistance {Battery Unit Having Vibration Robustness}

The present invention relates to a battery unit including a pouch-type battery cell and a cell case surrounding the same, and more particularly, to a battery unit having a structure capable of preventing the battery cell from vibrating inside the case.

Recently, the demand for electric powered vehicles such as electric vehicles and hybrid vehicles is increasing due to the depletion of fossil fuels and environmental pollution. The electric drive vehicle includes a large-capacity battery pack capable of traveling tens to hundreds of kilometers with a single charge.

The battery pack has a structure in which a plurality of battery units are assembled into one module and electrically connected in series between adjacent battery units. In addition, each battery unit has a structure in which a cell stack including one or more battery cells is wrapped with a cell case. The cell case exposes at least the electrodes of each battery cell housed therein to the outside, and the exposed electrodes are used for electrical connection between adjacent battery units.

While the electric drive car is running, a large and small vibration is applied to the battery pack. Therefore, the battery cells included in each battery unit also continue to vibrate by the applied vibration. When each battery cell is repeatedly moved, vibration propagates through the electrode into the battery cell, so that weak mechanical strength elements may be disconnected.

For example, a pouch cell is welded with electrode tabs and electrode leads protruding from an electrode plate having a thin thickness of several tens of micrometers. Can be.

The vibration applied to the battery pack can be alleviated by attaching the dustproof pad to the support on which the battery pack is installed. However, the anti-vibration pads are effective for mitigating minute vibrations, and vibrations with large amplitudes are difficult to mitigate. In addition, even if the battery pack itself is firmly fixed, the vibration is still propagated therein, so it is difficult to solve the above-described problem only with the dustproof structure of the battery pack.

Therefore, the present inventors have recognized that there is a need for a method capable of suppressing vibration even at the level of battery cells housed in each battery unit apart from designing a dustproof structure of the battery pack itself.

The present invention was made under the background of the prior art as described above, and an object thereof is to provide a battery unit having an improved structure of a cell case to effectively alleviate vibration even at the battery cell level.

In order to achieve the above technical problem, the battery unit with vibration resistance according to the present invention may include at least one having a structure in which a sealing line is formed along four sides and a first lead and a second lead having opposite polarities protrude from each other. A cell stack in which pouch cells are stacked; And a cell case including a top cover and a bottom cover coupled to each other to define a space in which the cell stack is seated, wherein the bottom cover includes first and second corner regions on the left and right sides of the cell stack and the cell. A first to fourth tight support that protrudes vertically from the bottom plate of the lower cover and has a hole at an end thereof so as to contact the third and fourth corner regions on the lower left and right sides of the stack, respectively, and the upper cover includes the first And first to fourth insertion rods protruding from the ceiling plate of the upper cover to be inserted into the holes of the fourth to fourth close support members.

Optionally, locally raised bead structures may be formed on the outer surface of the ceiling plate. In addition, a locally raised bead structure may be formed on the outer surface of the bottom plate.

Preferably, the first and second leads of each pouch cell included in the cell stack may protrude from upper and lower sides of the cell stack, respectively. In addition, a portion between an upper portion of the upper cover and an upper portion of the lower cover between the first corner region and the second corner region may be recessed inwardly to expose the first lead of each pouch cell. . In addition, a portion between the third corner region and the fourth corner region among the lower portion of the upper cover and the lower portion of the lower cover may be recessed inwardly to expose the second lead of each pouch cell. have.

Preferably, the upper cover and the lower cover may be coupled in a snap fit manner. For example, the upper cover may include an upper edge wall protruding from the ceiling plate toward the lower cover, and the lower cover may include a lower edge wall protruding from the bottom plate toward the upper cover. In addition, one of the ends of the upper rim wall and the end of the lower rim wall is formed a plurality of snap fit projections for the snap-fit method, the other side of the plurality of points corresponding to the snap fit projections Snap fit grooves may be formed.

Optionally, each of the first to fourth close support members may include a flat surface in an area in contact with the first to fourth corner areas. In this case, a dustproof pad may be attached to the flat surface, and the dustproof pad may be made of a foamed rubber material having a cushion.

According to another aspect of the present invention, there is provided a battery unit including one or more pouches having a structure in which a sealing line is formed along four sides and a first lead and a second lead having opposite polarities protrude from each other. A cell stack in which cells are stacked; And a cell case including a top cover and a bottom cover coupled to each other to define a space in which the cell stack is seated, wherein the bottom cover includes first and second corner regions on the left and right sides of the cell stack and the cell. A first to fourth lower tight support protruding from the bottom plate of the lower cover so as not to be spaced in a horizontal direction with the third and fourth corner regions at the lower left and right sides of the laminate, and the upper cover includes the first to the first It may be provided with a first to fourth upper contact support protruding from the ceiling plate of the upper cover to be in contact with the end of the lower support and the face to face.

Preferably, a groove is formed at one side of the ends of the first to fourth lower adhesion supporters and the ends of the first to fourth upper contact supporters, and a protrusion may be formed at the other side to be matched with the groove.

According to the present invention, since the pouch cell can be firmly fixed in the cell case, it is possible to effectively prevent the pouch cell from moving even if vibration is applied to the cell case.

The following drawings appended hereto illustrate one embodiment of the present invention, and together with the following detailed description serve to further understand the spirit of the present invention, the present invention being limited only to those described in such drawings. It should not be interpreted.
1 is a top plan view of a battery unit according to a preferred embodiment of the present invention.
FIG. 2 is a perspective view illustrating an embodiment of an upper cover and a lower cover constituting the cell case of FIG. 1.
3 is an exploded perspective view of a battery unit according to a preferred embodiment of the present invention.
4 is a perspective view of the pouch cell constituting the cell assembly according to an embodiment of the present invention.
FIG. 5 is a cross-sectional view taken along line AA ′ of FIG. 1.
6 is a cross-sectional view taken along the line BB ′ of FIG. 1.
FIG. 7 is a cross-sectional view taken along line CC ′ of FIG. 1.
8 is a partial cross-sectional view showing a snap fit coupling structure according to an embodiment of the present invention.
9 is a partial cross-sectional view showing a shape matching structure included in the coupling portion of the upper cover and the lower cover according to an embodiment of the present invention.
10 is a partial perspective view showing a modification of the close support in accordance with the present invention.
11 is a partial perspective view showing another modified example of the tight support according to the present invention.
FIG. 12 is a partial cross-sectional view illustrating a coupling structure of a lower contact support and an upper contact support according to a modification of the present invention based on a cross section taken along the line CC ′ of FIG. 1.
13 is a partial perspective view showing a modification of the vibration preventing structure (lower contact support, upper contact support) according to the present invention.
14 is a partial perspective view showing another modified example of the anti-vibration structure (lower contact support, upper contact support) according to the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Prior to this, terms or words used in the specification and claims should not be construed as having a conventional or dictionary meaning, and the inventors may properly interpret the concept of terms in order to best explain their own applications. It should be interpreted as meaning and concept corresponding to the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one embodiment of the present invention and do not represent all of the technical idea of the present invention, various equivalents that may be substituted for them in the present invention point of view. It should be understood that there may be variations and examples.

1 is a plan view of a battery unit 10 according to an embodiment of the present invention, FIG. 2 is a perspective view of an upper cover 11a and a lower cover 11b constituting the cell case 11 of FIG. 1, and FIG. 3. Is an exploded perspective view of the battery unit 10 of FIG. 1, FIG. 4 is a perspective view of the pouch cell 20 accommodated by the cell case 11 of FIG. 1, and FIG. 5 is along the AA ′ line of FIG. 1. 6 is a cross-sectional view taken along the line BB ′ of FIG. 1.

First, referring to FIGS. 1 to 3, the battery unit 10 according to the present invention includes a cell case 11 including a cell stack 12, an upper cover 11a, and a lower cover 11b. The cell stack 12 includes two pouch cells 20 stacked in the vertical direction, but the present invention is not limited by the number of pouch cells 20. That is, the cell stack 12 may include one or three or more pouch cells 20.

As shown in FIG. 4, the pouch cell 20 refers to a secondary battery in which the electrode assembly 22 and the electrolyte are sealed by a packaging material formed of the pouch film 21. The pouch film 21 has a structure in which one side of the aluminum thin film is coated with a resin film having a thermal adhesiveness, and the other side is coated with a durable resin film. Since the edge of the pouch cell 20 is sealed by heat fusion, it has a sealing line along four sides.

The electrode assembly 22 has a structure in which unit cells in which a negative electrode plate and a positive electrode plate are laminated with a separator interposed therebetween are stacked with a porous insulating layer interposed therebetween. The electrode assembly 22 may have a jelly roll structure in which a band-shaped unit cell is rolled in one direction, or a stack folding structure in which unit cells are arranged on a band-shaped porous insulating film and then folded together with the porous insulating film and the unit cells. .

The pouch cell 20 includes a first lead 23 and a second lead 24 exposed to the outside. The first lead 23 and the second lead 24 have opposite polarities. When the first lead 23 is a positive electrode lead, the first lead 23 is welded with electrode tabs extending from the positive electrode plates included in the electrode assembly 22. In addition, when the second lead 24 is a negative electrode lead, the second lead 24 is welded with electrode tabs extending from the negative electrode plates included in the electrode assembly 22.

The first lead 23 and the second lead 24 may be bonded to the pouch film 21 through the sealing tape 25. The sealing tape 25 is interposed between the first lead 23 and the second lead 24 of the metal material and the heat seal layer of the pouch film 21 to improve adhesion.

The pouch cell 20 described herein may be a lithium polymer pouch cell known in the art. However, the present invention is not limited by the specific type of the pouch cell 20. In addition, the structure of the pouch cell 20 which is not described here can refer to the structure of a well-known pouch cell.

In the pouch cell 20 constituting the cell stack 12, as illustrated in FIG. 6, which is a cross-sectional view taken along the line BB ′ of FIG. 1, the first and second leads 23 and 24 are formed. The sealing line 26 on the side that does not protrude is bent vertically. In addition, the bent sealing line 26 is in close contact with the inner wall of the cell case 11 when the upper cover 11a and the lower cover 11b are combined.

Preferably, the upper cover 11a and the lower cover 11b are coupled to each other to define a space in which the cell stack 12 is seated therebetween.

Referring to FIG. 2, the lower cover 11b includes a bottom plate 111b and a lower edge wall 112b extending vertically from the edge thereof toward the upper cover 11a. Here, the lower edge wall 112b may include at least the first leads 23 and the second leads so that at least the first leads 23 and the second leads 24 of the cell stack 12 may be exposed to the outside. A portion of the wall located in the direction in which the leads 24 extend may be opened.

Similarly, the upper cover 11a includes a ceiling plate 111a and an upper border wall 112a extending vertically from the edge thereof toward the lower cover 11b. Here, the upper edge wall 112a may include at least the first leads 23 and the second leads so that at least the first leads 23 and the second leads 24 of the cell stack 12 may be exposed to the outside. A portion of the wall located in the direction in which the leads 24 extend may be opened.

The upper cover 11a and the lower cover 11b include a configuration for preventing or mitigating vibration of each pouch cell 20 constituting the cell stack 12.

FIG. 7 is a cross-sectional view taken along the line CC ′ of FIG. 1, and more specifically illustrates a vibration preventing structure commonly introduced at each corner portion of the cell case 11.

1, 2 and 7, the lower cover 11b is formed as a part of an anti-vibration structure, and includes first and second corner regions 13a and 13b on the upper and left sides of the cell stack 12. Protruding vertically from the bottom plate 111b of the lower cover 11b so as to contact the third and fourth corner regions 13c and 13d at the lower left and right sides of the cell stack 12, and a hole h is formed at the end thereof. The first to fourth close contact supports 14a, 14b, 14c, and 14d formed may be provided.

In addition, the upper cover 11a is part of an anti-vibration structure, and the upper cover 11a may be inserted into the holes h of the first to fourth close contact supports 14a, 14b, 14c, and 14d, respectively. First to fourth insertion rods 15a, 15b, 15c, and 15d protruding from the ceiling plate 111a of the < RTI ID = 0.0 >

Here, the first and second corner regions 13a and 13b are located in the upper left and right corner regions when viewed in the stacking direction of the cell stack 12, as shown in FIGS. 1 and 3. Refers to the sealing portion of each pouch cell 20 present. In addition, the third and fourth corner regions 13c and 13d refer to the sealing portions of the pouch cells 20 located in the lower left and right corner regions when viewed in the stacking direction of the cell stack 12. .

The first to fourth supports 14a, 14b, 14c, and 14d are each provided with an upper cover 11a and a lower cover in a state where the cell stack 12 is interposed between the upper cover 11a and the lower cover 11b. When the 11b is joined to each other, the first to fourth corner regions 13a, 13b, 13c, and 13d of the cell stack 12 are closely attached to each other. Therefore, even when the externally applied vibration is applied to the cell case 11, it is possible to prevent the pouch cell 20 included in the cell stack 12 from vibrating inside the cell case 11. Sealing portions of the respective pouch cells 20 located in the first to fourth corner regions 13a, 13b, 13c, and 13d are brought into close contact with the first to fourth close supporters 14a, 14b, 14c, and 14d. This is because each pouch cell 20 is fixed to prevent movement. Therefore, it is possible to prevent the problem of the prior art that the welded portion between the electrode tabs and the lead in each pouch cell 20 is disconnected or a crack occurs in the welded portion.

Preferably, the upper cover 11a may have a bead structure 16a in which the outer surface of the ceiling plate 111a is locally raised as shown in FIGS. 1 and 5. Similarly, the lower cover 11b may also have a bead structure 16b in which the outer surface of the bottom plate 111b is locally raised.

The bead structures 16a and 16b may be used to define flow paths through which air may flow between adjacent battery units 10 when stacking the battery units 10 to form a large capacity battery pack.

In the present invention, the first and second leads 24 of the pouch cells 20 included in the cell stack 12 are upper sides of the cell stack 12 as shown in FIG. 1. And protrude from the lower side, respectively. However, it is also possible for the first and second leads 23 and 24 of each pouch cell 20 to protrude in one direction.

Preferably, a portion between an upper portion of the upper cover 11a and an upper portion of the lower cover 11b between the first corner region 13a and the second corner region 13b is each pouch cell 20. It may be recessed inward to expose the first lead 23 of the ().

In addition, among the lower portion of the upper cover 11a and the lower portion of the lower cover 11b, a portion between the third corner region 13c and the fourth corner region 13d is also included in each pouch cell 20. It may be recessed inward to expose the second lead 24 of the.

On the other hand, when the first and second leads 23, 24 of each pouch cell 20 protrude in one direction, the first lead from the upper side or the lower side of the upper cover 11a and the lower cover 11b. The recess structure may be formed only on the side where the first and second leads 24 protrude. For example, there may be a recess structure only on the upper side of the upper cover 11a and the lower cover 11b, or conversely, there may be a recess structure only on the lower side of the upper cover 11a and the lower cover 11b. . Of course, it is apparent to those skilled in the art that the present invention may be included in the scope of the present invention even in the absence of the recess structure.

The upper edge wall 112a of the upper cover 11a and the lower edge wall 112b of the lower cover 11b may be coupled in a snap fit manner.

That is, as shown in FIGS. 2 and 8, the end of the upper edge wall 112a may be provided with snap fit protrusions 17 for snap fit coupling at a plurality of points. In addition, snap fit grooves 18 may be formed at a plurality of points corresponding to the snap fit protrusions 17 at the end of the lower edge wall 112b.

Here, the positions of the snap fit protrusions 17 and the snap fit grooves 18 may be switched with each other. That is, the snap fit protrusions 17 may be provided at the end of the lower edge wall 112b, and the snap fit grooves 18 may be provided at the end of the upper edge wall 112a.

Preferably, an end portion of the upper edge wall 112a and an end of the lower edge wall 112b may have a shape-matching structure except for a position where a snap fit coupling is made.

For example, as shown in FIGS. 2 and 9, an end portion of the upper edge wall 112a may be provided with a protrusion line 19a, and an end portion of the lower edge wall 112b may be provided with the protrusion line 19a. ) May be provided with a groove line 19b matching the shape. Of course, the position of the projection line 19a and the groove line 19b may be changed.

In the present invention, each of the first to fourth close support (14a, 14b, 14c, 14d) may have a circular cross section. In addition, the depth of the hole h formed at the end of each close support may correspond to the length of the corresponding insertion rod.

On the other hand, each of the first to fourth close support (14a, 14b, 14c, 14d), as shown in Figure 10, the area where the sealing portion of each pouch cell 20 located in the corresponding corner area is in contact It may comprise a flat face (s). In this case, the fixing effect of the pouch cell 20 by the first to fourth close support (14a, 14b, 14c, 14d) can be further increased. In addition, the flat surface (s) as shown in Figure 11 may be attached to the anti-vibration pad (p) of the foam rubber material. The anti-vibration pad p further mitigates the vibration applied to each pouch cell 20, and further secures the fixing effect of the pouch cell 20 by the first to fourth adhesion supports 14a, 14b, 14c, and 14d. Promote.

According to the present invention, the structure in which each close support is coupled to the corresponding insertion rod may be modified as shown in FIG. 12.

Referring to FIG. 12, each contact support may be replaced by a lower contact support 14a ′ vertically protruding from the bottom plate 111b of the lower cover 11b. In addition, each insertion rod may be replaced by an upper tight support 15a 'protruding from the upper cover 11a.

In this case, the first to fourth tight supporters 14a, 14b, 14c, and 14d are replaced with first to fourth lower tight supporters 14a ', 14b', 14c ', and 14d'. The fourth insertion rods 15a, 15b, 15c, and 15d are replaced by the first to fourth upper contact supports 15a ', 15b', 15c ', and 15d'.

The ends of the first to fourth lower tight supports 14a ', 14b', 14c ', and 14d' are the ends of the corresponding first to fourth upper tight supports 15a ', 15b', 15c ', and 15d'. It is contacted face-to-face and conformed to the shape. At this time, the projections 30 are formed at the end portions of the first to fourth lower contact supports 14a ', 14b', 14c ', and 14d', and the first to fourth upper contact supports 15a ', 15b' and 15c '. , 15d ') may be provided with a groove 31 on which the protrusion 30 is seated. Of course, the position at which the protrusion 30 and the groove 31 are formed may be changed.

In a modified embodiment, the first to fourth lower contact supports 14a ', 14b', 14c ', 14d' and the corresponding first to fourth upper contact supports 15a ', 15b', 15c ', 15d ') are bonded to each other through the shape-matching structure of the end, and close the sealing portions of each pouch cell 20 in the first to fourth corner regions 13a, 13b, 13c, and 13d of the cell stack 12. I support it. Accordingly, the first to fourth lower contact supports 14a ', 14b', 14c ', and 14d' and the first to fourth upper contact supports 15a ', 15b', 15c ', and 15d' corresponding thereto are in close contact with each other. It is preferable not to be spaced apart from the sealing portion of each supported pouch cell 20.

On the other hand, the first to fourth lower contact support 14a ', 14b', 14c ', 14d' and the corresponding first to fourth upper contact support 15a ', 15b', 15c ', 15d', As shown in FIG. 13, a flat surface s may be included in an area where the sealing portion is in contact. In addition, the flat piece (s) may be attached to the anti-vibration pad (p) of the foam rubber material. In this case, as in the above-described embodiment, the fixing effect of the pouch cell 20 inside the cell case 11 may be further improved.

In the above-described embodiments, the upper cover 11a and the lower cover 11b may be made of a metal material or a plastic material. In addition, the upper cover 11a and the lower cover 11b may further include a metal plate inserted into the ceiling plate 111a and the bottom plate 111b to secure mechanical rigidity and improve cooling performance. In addition, the components introduced into the anti-vibration structure may be made of metal or plastic, and may be integrally injected with the upper cover 11a or the lower cover 11b or manufactured separately to form the upper cover 11a or the lower cover 11b. ) May be bonded.

The battery unit 10 described above can be used to construct a large capacity battery pack. That is, after stacking the plurality of battery units 10 in one direction and mechanically fixing the adjacent battery units 10 by bolts, clapping, welding, etc., the electrode leads of the adjacent battery units 10 are electrically connected. By connecting, a large capacity battery pack can be comprised.

The battery unit 10 according to the present invention may preferably be included in a large capacity battery pack of an electric drive vehicle. However, the battery unit 10 may also be included in a battery pack included in other applications, such as a large capacity power storage device or an unmanned power plane. Therefore, the present invention is not limited by the type of battery pack in which the battery unit 10 is included.

In the present invention, the terms upper, lower, upper, lower, left and right are terms indicating relative positions. Therefore, when the viewpoint of the component is changed, the term indicating the relative position may also vary according to the changed viewpoint. Therefore, it will be apparent to those skilled in the art that the present invention is not limited by the term indicating the relative position.

Although the present application has been described by way of limited embodiments and drawings, the present application is not limited thereto and will be described below by the person skilled in the art and the technical spirit of the present application. Of course, various modifications and variations are possible within the scope of the claims.

Claims (19)

A cell stack in which a plurality of pouch cells having a structure in which a sealing line is formed along four sides and a first lead and a second lead having opposite polarities protrude outwards are stacked; And
A cell case including an upper cover and a lower cover coupled to each other to define a space in which the cell stack is seated;
The lower cover may be in close contact with the outer edges of the first and second corner regions on the left and right sides of the cell stack and toward the outer edges of the third and fourth corner regions on the left and right sides of the cell stack. It is provided with a pillar-shaped first to fourth close support that extends from the bottom plate and vertically protrudes and formed inside the end,
The upper cover has first to fourth insertion rods extending from the ceiling plate of the upper cover so as to be inserted into the holes of the first to fourth close support, respectively,
The first to fourth insertion rods are inserted into and coupled to the end inner holes of the first to fourth tight supporters facing each other,
The first to fourth insertion rods and the first to fourth close support members coupled to each other support the upper cover and the lower cover and adhere to the outer edges of the first to fourth corner regions so that A battery unit with vibration resistance, characterized by preventing flow.

The method of claim 1,
And a bead structure that is locally raised on the outer surface of the ceiling plate.
The method of claim 1,
And a bead structure that is locally raised on the outer surface of the bottom plate.
The method of claim 1,
The first and second leads of each pouch cell included in the cell stack protrude from an upper side and a lower side of the cell stack, respectively.

A portion between an upper portion of the upper cover and an upper portion of the lower cover between the first corner region and the second corner region is recessed inwardly to expose the first lead of each pouch cell,
A portion between the lower portion of the upper cover and the lower portion of the lower cover between the third corner region and the fourth corner region is recessed inwardly to expose the second lead of each pouch cell. Battery unit with vibration resistance.
The method of claim 1,
The upper cover and the lower cover is a battery unit having a vibration resistance, characterized in that coupled to the snap fit method.
The method of claim 5,
The upper cover includes an upper edge wall protruding from the ceiling plate toward the lower cover,
The lower cover includes a lower edge wall protruding from the bottom plate toward the upper cover,
One end of the upper edge wall and the end of the lower edge wall is formed with snap fit protrusions for snap fit coupling at a plurality of points, and snap fit at a plurality of points corresponding to the snap fit protrusions at the other side. The battery unit with vibration resistance, characterized in that the grooves are formed.
The method of claim 1,
Each of the first to fourth close support members includes a flat surface in an area in contact with the first to fourth corner areas.
The method of claim 7, wherein
The battery unit with vibration resistance, characterized in that it further comprises a dust pad attached to the flat surface.
The method of claim 8,
The vibration pad is a battery unit having a vibration resistance, characterized in that made of foam rubber material.
A cell stack in which a plurality of pouch cells having a structure in which a sealing line is formed along four sides and a first lead and a second lead having opposite polarities protrude outwards are stacked; And
A cell case including an upper cover and a lower cover coupled to each other to define a space in which the cell stack is seated;
The lower cover is bottom of the lower cover so as to contact the outer edges of the first and second corner regions on the left and right upper and lower sides of the cell stack and the outer edges of the third and fourth corner regions on the lower left and right sides of the cell stack. A first to fourth lower tight support having a columnar shape extending from the plate and vertically projecting;
The upper cover includes columnar first to fourth upper contact supports extending from the ceiling plate of the upper cover so as to contact the end surfaces of the first to fourth lower supports with a face-to-face surface,
The end portions of the first to fourth lower tight supports are in contact with the end portions of the first to fourth upper tight supports, which face each other,
The first to fourth lower contact supports and the first to fourth upper contact supports, which are in contact with the surface-to-face, support the upper cover and the lower cover and adhere to the outer edges of the first to fourth corner regions. A battery unit with vibration resistance characterized by preventing the flow of the cell stack.
The method of claim 10,
Vibration resistance is characterized in that a groove is formed on one side of the ends of the first to fourth lower contact support and the ends of the first to fourth upper contact support, and a projection is formed on the other side. Battery unit.
The method of claim 10,
And a bead structure that is locally raised on the outer surface of the ceiling plate.
The method of claim 10,
And a bead structure that is locally raised on the outer surface of the bottom plate.
The method of claim 10,
The first and second leads of each pouch cell included in the cell stack protrude from an upper side and a lower side of the cell stack, respectively.
A portion between the upper portion of the upper cover and the upper portion of the lower cover between the first and second corner regions is recessed inwardly to expose the first lead of each pouch cell,
Vibration resistance, characterized in that the lower portion of the upper cover and the lower portion of the lower cover between the third and fourth corner regions recessed inwardly to expose the second lead of each pouch cell. Battery unit with.
The method of claim 10,
The upper cover and the lower cover is a battery unit having a vibration resistance, characterized in that coupled to the snap fit method.
The method of claim 15,
The upper cover includes an upper edge wall protruding from the ceiling plate toward the lower cover,
The lower cover includes a lower edge wall protruding from the bottom plate toward the upper cover,
One end of the upper edge wall and the end of the lower edge wall is formed with snap fit protrusions for snap fit coupling at a plurality of points, and snap fit at a plurality of points corresponding to the snap fit protrusions at the other side. The battery unit with vibration resistance, characterized in that the grooves are formed.
The method of claim 10,
Each of the first to fourth lower contact supports and each of the first to fourth upper contact supports includes a flat surface in an area in contact with a sealing portion of the cell stack. unit.
The method of claim 17,
The battery unit with vibration resistance, characterized in that it further comprises a dust pad attached to the flat surface.
The method of claim 18,
The vibration pad is a battery unit having a vibration resistance, characterized in that made of foam rubber material.

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