CN117957707A - Battery pack and vehicle including the battery pack - Google Patents

Abstract

The battery pack of the present invention comprises: a plurality of soft-pack battery cells; a battery pack shell, wherein the plurality of soft-pack battery cells are accommodated in the internal space of the battery pack shell; and a battery cell cover, wherein the battery cell cover is configured to partially surround the outside of at least one of the plurality of soft-pack battery cells to form an open portion, wherein a flame-retardant portion is included on one side of the battery pack shell where the open portion is located.

Description

Battery pack and vehicle including the battery pack

Technical Field

The present disclosure relates to a battery pack and a vehicle including the same, and more particularly, to a battery pack with improved stability and a vehicle including the same. This application claims priority to Korean Patent Application No. 10-2022-0070539 filed on June 10, 2022 and Korean Patent Application No. 10-2023-0055776 filed on April 27, 2023, the disclosures of which are incorporated herein by reference.

Background technique

With the development of technology and significant increase in demand for various mobile devices, electric vehicles, energy storage systems (ESS), and the like, interest in and demand for secondary batteries as energy sources are rapidly increasing.

Nickel-cadmium batteries or nickel-hydrogen batteries have been widely used as conventional secondary batteries, but recently, lithium secondary batteries having the advantages of free charge/discharge, very low self-discharge rate, and high energy density due to almost no memory effect compared with nickel-based secondary batteries are widely used.

These lithium secondary batteries mainly use lithium-based oxides and carbon materials as positive electrode active materials and negative electrode active materials, respectively. The lithium secondary battery includes: an electrode assembly, in which a positive electrode plate and a negative electrode plate coated with positive electrode active materials and negative electrode active materials are provided, respectively, and a separator is located between the positive electrode plate and the negative electrode plate; and an external material (i.e., a battery case) that seals and contains the electrode assembly together with the electrolyte.

Generally, secondary batteries may be classified into a hard case type battery in which an electrode assembly is embedded in a metal can and a pouch type battery in which an electrode assembly is embedded in a pouch made of an aluminum laminate sheet, according to the shape of an exterior material.

Recently, battery modules have been widely used for driving or energy storage in medium-sized to large-sized devices such as electric vehicles or energy storage systems.

A conventional battery pack includes one or more battery modules and a control unit for controlling the charge and discharge of the battery modules inside the battery pack housing. Here, the battery module is configured to include a plurality of battery cells inside the module housing. That is, in the case of a conventional battery pack, a plurality of battery cells (secondary batteries) are housed inside the module housing to form individual battery modules, and one or more of these battery modules are housed inside the battery pack housing to form a battery pack. In particular, in the case of soft-pack type batteries, these soft-pack type batteries have advantages in various aspects, such as light weight and small dead space when stacked, but there are also problems that these soft-pack type batteries are susceptible to external shocks and poor assembly. Therefore, the battery pack is usually manufactured in the form of a plurality of battery cells that are first modularized and then housed inside the battery pack housing.

However, in the case of a conventional battery pack, due to modularization, it may be disadvantageous in energy density, assemblability, cooling, etc. In particular, in the case of a pouch type battery cell, swelling may occur, and a conventional battery pack has a problem of difficulty in adequately coping with such swelling.

In addition, in the case of a conventional battery pack, due to modularization, it may be disadvantageous in terms of energy density, assemblability, cooling property, etc.

In addition, in the case of a conventional battery module or battery pack, it may be susceptible to thermal accidents. In particular, when a thermal accident occurs inside the battery module or battery pack, thermal runaway may occur, resulting in fire and, in severe cases, explosion.

Summary of the invention

technical problem

The present disclosure is intended to solve the problems in the related art, and therefore, the present disclosure is intended to provide a battery pack excellent in various aspects such as swelling response performance and a vehicle including the battery pack.

Furthermore, in order to solve another problem, the present disclosure is directed to providing a battery pack capable of ensuring excellent stability when a thermal accident occurs and a vehicle including the battery pack.

In particular, it is intended to provide a battery pack and a vehicle including the battery pack that are capable of preventing heat from propagating to adjacent battery cells by reducing the intensity of flames and controlling backflow when a thermal accident occurs inside the battery pack.

However, the technical problems to be solved by the present disclosure are not limited to the above-mentioned problems, and other problems not raised herein can be clearly understood by those skilled in the art from the following description of the present disclosure.

Technical solutions

In order to solve the above problems, a battery pack according to one aspect of the present disclosure includes: a plurality of soft-pack type battery cells; a battery pack case, the plurality of soft-pack type battery cells being accommodated in an internal space of the battery pack case; and a battery cell cover, the battery cell cover being configured to partially surround the outside of at least one of the plurality of soft-pack type battery cells to form an open portion.

The battery pack case may include a flame retardant portion on a side where the opening portion is located.

The flame-retardant portion may be configured to reduce a linearity of passage of gas and flame generated from the at least one pouch-type battery cell through the flame-retardant portion.

The inner space of the battery pack case may include a storage space for accommodating a plurality of soft-pack type battery cells and a vent space surrounding the storage space.

The internal space of the battery pack case may allow the gas and flame that have passed through the flame-retardant portion to be discharged to the outside of the battery pack case through the exhaust space.

There may be multiple battery cell covers.

The flame retardant portion may include: a separator provided at a corresponding position between adjacent battery cell covers; and a catch portion provided at a position corresponding to the opening portion of each of the battery cell covers.

At least a portion of the partition may be located between the storage space and the exhaust space.

The capture portion may be located within the exhaust space.

The battery pack case may include a receiving portion configured to receive the flame-retardant portion.

The flame-retardant portion may include a combining portion configured to be combined with the battery pack case.

The flame retardant portion may be a wedge-shaped structure having a wave-shaped cross section at least on one end.

The battery cell cover may include: a first cover portion, which covers one side of the surrounded soft-pack type battery cell; a second cover portion, which covers the other side of the surrounded soft-pack type battery cell; and a top cover portion, which connects the first cover portion and the second cover portion and covers one side of the surrounded soft-pack type battery cell.

Each of the plurality of pouch-type battery cells may include an electrode lead.

An opening may be formed at an end of the first cover portion of the battery cell cover at a side where the electrode lead is provided and at an end of the second cover portion at a side where the electrode lead is provided.

The battery pack may further include a side member covering the open portion.

At least a portion of the side assembly may be inserted into the battery cell cover.

The side assembly may include a bus bar assembly configured to be electrically connected to the electrode lead; and an end cap covering one side of the bus bar assembly and configured to discharge gas generated from at least a portion of the surrounded pouch type battery cell.

The side assembly may include an intermediate cover between the bus bar assembly and the end cover for insulation.

The side components may include a mesh portion.

The battery pack may include a thermal resin in at least a portion of a space between a battery cell cover and a pack case and a space between a plurality of pouch type battery cells and the pack case.

The battery cell cover may be configured to support the pouch type battery cell in a state of standing upright between the first cover portion and the second cover portion.

The battery cell cover may include an insulating coating on at least a portion of an inner surface of the first cover portion and an inner surface of the second cover portion.

The battery cell cover may include an adhesive member on at least a portion of an outer surface of the first cover portion and an outer surface of the second cover portion.

The vehicle of the present disclosure may include the battery pack according to the present disclosure.

Beneficial Effects

According to an aspect of the present disclosure, a plurality of pouch-type battery cells may be stably accommodated inside a battery pack case without a configuration such as a stacking frame like a plastic box, a separate module case, or the like.

In addition, a cell to pack (CTP) type battery pack using a soft-pack type battery cell can be more efficiently implemented. That is, the battery pack can be configured in a form in which the soft-pack type battery cell is directly accommodated inside the battery pack housing, rather than in a form in which the soft-pack type battery cell is directly accommodated inside a separate module housing, and then the module housing is accommodated inside the battery pack housing.

According to this configuration of the present disclosure, the flame and gas generated in the event of a thermal accident inside the battery pack are directed to the flame retardant portion through the open portion, and the flame and gas continuously collide between a portion of the space formed in the flame retardant portion. Therefore, as the linearity of the flame and gas decreases, the flame and gas can be discharged with the intensity of the flame and gas reduced. In addition, the gas can be discharged in a desired direction by providing the flame retardant portion at a position where the flame and gas are easily discharged.

According to another aspect of the present disclosure, the side assembly is inserted into the battery cell cover, so the battery cell cover and the side assembly can be effectively combined by such a structure. In addition, the end cover covers a portion of the soft pack type battery cell not covered by the battery cell cover, thereby providing more stable protection.

According to another aspect of the present disclosure, when gas and/or flame are generated due to expansion or thermal runaway in the soft pack type battery cell, the gas and/or flame can be discharged to the outside of the battery cell unit through the first exhaust portion. Therefore, by guiding the side exhaust, the gas and/or flame can be prevented from being discharged freely through the opening portion of the battery cell cover.

According to another aspect of the present disclosure, the flow of flames that may occur in the soft pack type battery cell can be mainly blocked by the middle cover, thereby reducing the intensity of the flames and preventing the flames from being quickly discharged into the first exhaust portion. In addition, a short circuit caused by contact between the bus bar assembly and the end cover can be prevented.

As described above, according to the present disclosure, a battery pack having excellent performance in various aspects such as expansion response performance and a vehicle including the battery pack can be provided. In addition, a battery pack having excellent safety when a thermal accident occurs and a vehicle including the battery pack can be provided.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram showing a battery pack according to the present disclosure.

FIG. 2 is an exploded perspective view of a battery pack according to the present disclosure.

FIG. 3 is a diagram illustrating a pouch type battery cell and a battery cell cover included in a battery pack according to the present disclosure.

FIG. 4 is a diagram showing a portion of components included in a battery pack according to the present disclosure.

FIG. 5 is a diagram showing an example form of a flame-retardant portion included in a battery pack according to the present disclosure.

FIG. 6 is a diagram illustrating paths of gas and flame generated from a battery cell unit included in a battery pack according to the present disclosure.

FIG. 7 is a diagram showing a partial cross-section of a battery pack according to the present disclosure.

FIG. 8 is an enlarged view of a portion of FIG. 7 .

FIG. 9 is a diagram showing a portion of components of a battery pack according to the present disclosure.

FIG. 10 is a diagram illustrating a bus bar assembly included in a battery pack according to the present disclosure.

FIG. 11 is a diagram illustrating an end cover included in a battery pack according to the present disclosure.

FIG. 12 is a diagram illustrating a middle cover included in a battery pack according to the present disclosure.

FIG. 13 is a diagram showing a partial cross-section of a battery pack according to the present disclosure.

FIG. 14 is a diagram showing a vehicle according to the present disclosure.

Detailed ways

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The accompanying drawings herein illustrate preferred embodiments of the present disclosure and are used to further understand the technical aspects of the present disclosure together with the detailed description below, so the present disclosure should not be interpreted as being limited to those described in the accompanying drawings. The same reference numerals represent the same components. In addition, in the accompanying drawings, the thickness, proportions, and sizes of the components may be exaggerated in order to effectively describe the technical content.

It should be understood that the terms used in the specification and the appended claims should not be interpreted as limited to the general meaning and the meaning in the dictionary, but should be interpreted based on the meaning and concepts corresponding to the technical aspects of the present disclosure on the basis of the principle that the inventor allows appropriate definition of the terms for the best interpretation.

Terms indicating directions such as up, down, left, right, front, and rear used herein are only for convenience of description, but it is obvious to those skilled in the art that the terms may be changed according to the position of the element or observer.

Therefore, since the embodiments described herein and the configurations shown in the accompanying drawings are merely the most preferred embodiments of the present disclosure and do not represent all technical aspects of the present disclosure, it should be understood that various equivalents and modifications may exist in the present application to replace these embodiments and configurations.

Fig. 1 is a diagram showing a battery pack according to the present disclosure. Fig. 2 is an exploded perspective view showing a part of components of the battery pack according to the present disclosure. Fig. 3 is a diagram showing a pouch type battery cell and a battery cell cover included in the battery pack according to the present disclosure.

1 to 3 , a battery pack 10 according to the present disclosure includes a plurality of pouch-type battery cells 100 , a pack case 300 , and a battery cell cover 200 .

The soft-pack type battery cell 100 may include an electrode assembly, an electrolyte, and a soft-pack external material. The soft-pack type battery cell 100 may include a storage portion 110 for accommodating the electrode assembly and a sealing portion 120 extending outward from the periphery of the storage portion 110. The soft-pack type battery cell 100 may include an electrode lead 111. The electrode lead 111 may be pulled out in two directions of the soft-pack external material, respectively, or may be pulled out only on one side. In the example shown, the electrode lead 111 is pulled out in two directions (Y-axis direction) of the soft-pack type battery cell 100. The direction in which the electrode lead 111 is pulled out may be defined as the longitudinal direction of the soft-pack type battery cell 100. In other words, it can also be said that the electrode lead 111 is pulled out forward and backward along the longitudinal direction of the soft-pack type battery cell 100, respectively.

2 and 3 , the pouch type battery cell 100 may be surrounded by a battery cell cover 200 to form a battery cell unit U. As shown in FIG.

2 and 3 , the battery pack 10 includes a plurality of such battery cell units U, and therefore, a plurality of soft-pack type battery cells 100 may be included in the battery pack 10. A plurality of soft-pack type battery cells 100 may be stacked in at least one direction. A plurality of soft-pack type battery cells 100 may be stacked and arranged in the left-right direction (X-axis direction). Referring to FIG. 3 , two soft-pack type battery cells 100 are stacked in the left-right direction to form one battery cell unit U, and referring to FIG. 2 , three such battery cell units U are stacked in the left-right direction and arranged in a 1×3 arrangement in the battery pack housing 300.

The battery cell cover 200 may be configured to partially surround the outer side of at least one soft-pack type battery cell 100 to form an opening portion O. The battery cell cover 200 may be configured to surround a portion of a plurality of soft-pack type battery cells 100 stacked in the left-right direction. The battery cell cover 200 may be configured to form an opening portion O on a side surface where the electrode lead 111 is disposed.

The battery cell cover 200 may be configured to group and unitize a plurality of soft-pack type battery cells 100 included in the battery pack 10. One battery cell cover 200 may constitute one battery cell unit U. For example, one battery cell unit U is shown in FIG. 3 and a plurality of battery cell units U are shown in FIG. 2 . The battery cell cover 200 may surround at least three surfaces of the soft-pack type battery cell 100.

A plurality of battery cell units U may be included in the battery pack 10, and in this case, a plurality of battery cell covers 200 may be included in the battery pack 10. When the battery cell covers 200 surround two or more soft-pack type battery cells 100, the battery pack 10 may include a smaller number of battery cell covers 200 than the number of soft-pack type battery cells 100.

The battery cell unit U is also referred to as a cell bank. According to the present disclosure, the battery cell cover 200 is in the form of partitioning the battery cell banks, and thus, thermal runaway and explosion of each battery cell bank may be prevented.

The battery cell cover 200 may be made of various materials to ensure rigidity. In particular, the battery cell cover 200 may be made of a metal material. In the case of such a metal material, the stacking state of the soft-pack type battery cells 100 may be more stably maintained, and the soft-pack type battery cells 100 may be more safely protected from external impacts. The battery cell cover 200 may be made of a SUS material. For example, the battery cell cover 200 may be made entirely of a SUS material.

A heat barrier (not shown) is also included between adjacent battery cell covers 200. The heat barrier may be configured in the form of a pad made of a heat insulating material or a flame suppressing material, preferably, made of a compressible material. Preferably, the heat barrier may be configured to be in close contact with the battery cell cover 200 between adjacent battery cell covers 200. Therefore, the heat barrier may be configured to suppress an expansion phenomenon that may occur in the soft-pack type battery cell 100. In addition, the heat barrier may delay the spread of flames due to thermal runaway, interrupt heat transfer, and simultaneously suppress an expansion phenomenon that may occur in the soft-pack type battery cell 100, thereby further ensuring the structural stability of the battery pack 10.

The battery cell cover 200 may be made of various materials to ensure rigidity. In particular, the battery cell cover 200 may be made of a metal material. In the case of such a metal material, the stacking state of the soft-pack type battery cells 100 may be more stably maintained, and the soft-pack type battery cells 100 may be more safely protected from external impacts. The battery cell cover 200 may be made of a SUS material. For example, the battery cell cover 200 may be made entirely of a SUS material.

In this way, when the battery cell cover 200 is made of a steel material, it has excellent mechanical strength and rigidity, and therefore, the stacked state of the soft-pack type battery cell 100 can be supported more stably. In addition, in this case, the soft-pack type battery cell 100 can be more effectively prevented from being damaged or broken due to external impacts (e.g., a needle-shaped body). In addition, in this case, the handling of the soft-pack type battery cell 100 can be more convenient. In addition, due to the high melting point, when a flame is generated from the battery cell 100, the overall structure can be stably maintained. Due to the higher melting point compared to the aluminum material, the battery cell cover 200 will not melt even when a flame is emitted from the battery cell 100, and its shape can be stably maintained. Therefore, the effect of preventing the flame from spreading or delaying between the battery cells 100, the exhaust control effect, etc. can be well ensured.

In addition, by surrounding the battery cell 100 with the battery cell cover 200, the battery cell 100 can be easily manufactured in a solid form, thereby more conveniently facilitating the configuration of the battery cell 100 directly stacked inside the pack case 300. Therefore, the assemblability and mechanical stability of the battery pack 10 can be improved.

According to such a configuration of the present disclosure, a plurality of pouch type battery cells 100 may be stably accommodated inside the battery pack case 300 without a configuration such as a stacking frame like a plastic box, a separate module case, or the like.

In addition, with the present disclosure, a CTP type battery pack 10 using a soft-pack type battery cell 100 can be more effectively implemented. That is, the battery pack 10 can be provided in a form in which the soft-pack type battery cell 100 is directly accommodated inside the battery pack case 300, rather than in a form in which the soft-pack type battery cell 100 is directly accommodated inside a separate module case and then the module case is accommodated inside the battery pack case 300. At this time, at least one side of the soft-pack type battery cell 100 can be exposed to the outside of the battery cell cover 200 and is provided to directly face the battery pack case 300.

Therefore, according to this aspect of the present disclosure, it is not necessary to additionally provide a module housing, a stacked frame, a fastening member such as a bolt for maintaining the stacked state of the battery cells, etc. in the battery pack 10. Therefore, it is possible to eliminate the space occupied by other components such as the module housing or the stacked frame or the space for ensuring the tolerance caused thereby. Therefore, since the battery cell 100 can occupy as much or more space as the space from which other components are removed, the energy density of the battery pack 10 can be further improved.

In addition, according to this aspect of the present disclosure, since a module case, a stacking frame, bolts, etc. are not provided, the volume or weight of the battery pack 10 may be reduced, and the manufacturing process may be simplified.

In addition, according to this aspect of the present disclosure, it is possible to facilitate the handling of the soft-pack type battery cell 100. For example, when a plurality of soft-pack type battery cells 100 are accommodated inside the battery pack housing 300, the soft-pack type battery cell 100 may be clamped by a clamp or the like. In this case, the clamp may not directly clamp the soft-pack type battery cell 100, but may clamp the battery cell cover 200 surrounding the soft-pack type battery cell 100. Therefore, it is possible to prevent the soft-pack type battery cell 100 from being damaged or broken due to the clamp.

In addition, the cooling efficiency of the battery pack 10 can be further improved. In particular, in the case of the embodiment of the present disclosure, a portion of each battery cell 100 can be directly exposed to the pack case 300 so that the heat of each battery cell 100 can be effectively discharged to the outside through the pack case 300.

A space may be formed in the battery pack housing 300 to accommodate the soft-pack type battery cell 100. For example, the battery pack housing 300 may include a first housing 310, a second housing 320, and a top cover 330. The first housing 310 may be configured in the form of a box with an open top to accommodate a plurality of soft-pack type battery cells 100 in the internal space. The second housing 320 may be configured in the form of a box with an open top to accommodate the first housing 310 in the internal space. The top cover 330 may be configured in the form of a cover covering the top open portion of the first housing 310 and the second housing 320. On the other hand, the battery pack housing 300 is not limited to the above structure, but may also have a double-walled structure in which the first housing 310 and the second housing 320 are integrally combined, wherein a portion corresponding to the first housing 310 is an inner wall and a portion corresponding to the second housing 320 constitutes an outer wall. However, the following description will be limited to the case where the battery pack housing 300 consists of the first housing 310 and the second housing 320.

Fig. 4 is a diagram showing a part of components included in the battery pack 10 according to the present disclosure. Fig. 5 is a diagram showing an example form of a flame retardant portion included in the battery pack 10 according to the present disclosure.

4 and 5 , the battery pack case 300 may include a flame retardant portion 340. The flame retardant portion 340 may be disposed on a side where the opening portion O is located. The flame retardant portion 340 may be disposed on one side of the first case 310 facing the opening portion O. Here, the opening portion O may refer to a side located in the Y-axis extension direction of the battery monomer unit U.

The flame retardant portion 340 may be configured to reduce the linearity of the gas and flame generated from at least one soft-pack type battery cell 100. The flame retardant portion 340 may not simply have a plate shape, but may have a shape that is regularly protruding or concave toward the discharge direction of the flame and gas. Therefore, a portion of space may be formed between the regularly protruding or concave portions of the substantially flat plate. Flames and gases may gather in these spaces. For example, as shown in FIG. 4, the flame retardant portion 340 may have a wedge-shaped structure in which a cross-section of one end portion (a cross-section perpendicular to the Z-axis direction) includes a wavy shape. The flame retardant portion 340 may be disposed in a portion corresponding to the battery cell unit U housed inside the first shell 310. The wedge-shaped structure may include a plurality of wedge structures, each of which may be configured to form a portion of space between the wedge-shaped structure and the outer surface of the first shell 310 at a position corresponding to each battery cell unit U.

As shown in FIG5 , the flame retardant portion 340 may be a substantially egg carton-shaped plate having regular protrusions 340A and recesses 340b. The recesses 340b may be inwardly recessed portions, and the protrusions 340a may be portions protruding convexly around the recesses 340b. The flame retardant portion 340 is not necessarily limited to the shape shown in FIG5 , as long as it has regularly protruding or recessed portions, and the regularly protruding or recessed portions may be configured to form a portion of space between the regularly protruding or recessed portions and the outer surface of the first shell 310. For example, a three-dimensional structure such as various sound absorbing wedges applied inside a soundproof chamber may be used for the flame retardant portion 340. As is well known, a chamber designed to have conditions similar to a free sound field by preventing the sound generated in the internal space of the chamber from being reflected by the walls, the top plate, and/or the bottom plate is called a soundproof chamber. As a conventional sound absorbing material used in a anechoic chamber, a sound absorbing wedge having a triangular cross section protruding inside the anechoic chamber is typical. The flame retardant portion 340 may also have a protruding triangular cross section.

The flame retardant part 340 can be made of various materials to withstand high temperature and high pressure. In particular, the flame retardant part 340 can be made of a metal material. In the case of such a metal material, the intensity of flame and gas can be effectively reduced.

The flame retardant portion 340 may be configured to allow gas and flame generated from at least one soft pack type battery cell 100 to pass therethrough. The flame retardant portion 340 may have holes through which gas and flame pass. For example, the holes may be a plurality of regularly perforated holes, so the flame retardant portion 340 is configured as a perforated plate-like plate.

FIG. 6 is a diagram illustrating paths of gas and flame generated from a battery cell unit included in a battery pack according to the present disclosure.

The effect of the flame-retardant portion 340 of the present disclosure will be described in detail with reference to FIG. 6 .

When a thermal accident occurs inside the battery pack 10, the generated flame and gas are directed to the flame retardant part 340 through the opening O of the battery cell cover 200, and a part of the flame and gas are discharged through the hole formed in the flame retardant part 340, as shown by the dotted arrow in FIG6, and the remaining other flames and gases collide continuously between a part of the space formed in the flame retardant part 340, as shown by the solid arrow in FIG6. The path of the flame and gas. Therefore, since all flames and gases are discharged according to the time difference of the discharge path, rather than passing through the flame retardant part 340 instantly, the intensity of the flame and gas can be reduced. In addition, since the flame and gas collide continuously between a part of the space formed between the flame retardant part 340 and the first shell 310, the linearity of the flame and gas is reduced, and the flame and gas can be discharged in a state of reduced intensity. In addition, the flame retardant part 340 can also be used to guide the flame path. In addition, by arranging the flame retardant part 340 at a position where the flame and gas are easily discharged, the gas can be discharged in the desired direction.

Referring again to FIG. 3 , the battery cell cover 200 may include a first cover portion 210 , a second cover portion 220 , and a top cover portion 230 .

3 , the first cover portion 210 may be configured to cover one side of the enclosed soft-pack type battery cell 100. The first cover portion 210 may be configured to cover the right side (side located in the positive X-axis direction) of the enclosed soft-pack type battery cell 100. The first cover portion 210 may cover the storage portion 110 and the sealing portion 120 of the enclosed soft-pack type battery cell 100. The first cover portion 210 may be in a plate shape.

The second cover portion 220 may face the first cover portion 210. The second cover portion 220 may cover the other side of the enclosed soft-pack type battery cell 100. The second cover portion 220 may be configured to cover the left side (the side located in the negative X-axis direction) of the enclosed soft-pack type battery cell 100. The second cover portion 220 may cover the storage portion 110 and the sealing portion 120 of the enclosed soft-pack type battery cell 100. The second cover portion 220 may be in a plate shape.

The battery cell cover 200 may be configured to support the soft-pack type battery cell 100 in a state of standing between the first cover portion 210 and the second cover portion 220. The first cover portion 210 and the second cover portion 220 may be parallel to each other. Therefore, the configuration in which the soft-pack type battery cells 100 are stacked side by side in the left-right direction in a standing state may be stably maintained.

The top cover portion 230 may connect the first cover portion 210 and the second cover portion 220. The top cover portion 230 may cover one side of the enclosed soft-pack type battery cell 100. The top cover portion 230 may cover the upper portion (positive Z-axis direction) of the storage portion 110 of the enclosed soft-pack type battery cell 100. The top cover portion 230 may be in a plate shape.

The side component (see S in FIG. 9 described below) may be inserted between a portion of the first cover portion 210 covering the sealing portion 120 and a portion of the second cover portion 220 covering the sealing portion 120. The first cover portion 210 and the second cover portion 220 may have a portion protruding further toward the electrode lead 111 than the top cover portion 230. That is, the battery cell cover 200 may have an "n" shape surrounding at least three surfaces of the storage portion 110, wherein a portion of the first cover portion 210 and a portion of the second cover portion 220 protrude more than the top cover portion 230, so that only the portions of the first cover portion 210 and the second cover portion 220 cover the sealing portion 120.

At least a portion of the first cover portion 210, the second cover portion 220, and the top cover portion 230 may be formed integrally with each other. The first cover portion 210, the second cover portion 220, and the top cover portion 230 may be formed by bending a plate. Such a configuration in which a bend is formed in a plate to form the battery cell cover 200 may be achieved in various ways (e.g., by pressing or roll forming). According to such a configuration of the present disclosure, the manufacture of the battery cell cover 200 may be further simplified. Alternatively, the first cover portion 210, the second cover portion 220, and the top cover portion 230 may be manufactured separately and then combined with each other by bonding, assembly, welding, or bolting.

A plurality of battery cell covers 200 may be included in the battery pack 10. In this case, an adhesive member may be inserted between the battery cell covers 200. For example, an adhesive member may be inserted between the first cover portion 210 and/or the second cover portion 220 as portions where the two battery cell covers 200 face each other to bond and fix the first cover portion 210 and/or the second cover portion 220 together. Through this bonding configuration, the connection configuration between the plurality of battery cell covers 200 may be further enhanced. The adhesive member may be insulating to achieve insulation between the battery cell covers 200 that may be made of a metal material. In addition, the adhesive member may be thermally conductive. Through this bonding, the battery cell cover 200 may be firmly combined with the battery cell 100 and may help dissipate heat generated from the battery cell 100 to the outside of the battery cell 100.

The battery cell cover 200 may include an insulating coating on the inner surface. The insulating coating may be coated on the inner surface of the first cover portion 210 and/or the inner surface of the second cover portion 220. The insulating coating may be formed by coating, applying or attaching any one insulating material selected from silicone, polyamide and rubber. The insulating coating may maximize the insulating coating effect with a minimum coating amount. In addition, the insulating coating may be applied to the inner surface of the battery cell cover 200, thereby enhancing the insulation between the soft-pack type battery cell 100 and the battery cell cover 200.

In FIG. 3 , for example, the number of soft-pack type battery cells 100 surrounded by one battery cell cover 200 is two. By adjusting the width of the battery cell cover 200, especially the width of the top cover portion 230, the number of soft-pack type battery cells 100 surrounded by one battery cell cover 200 can be adjusted to one or more than three as needed. Therefore, the battery cell unit U may also be referred to as an expandable soft-pack unit (SPU), and has the advantage of accommodating the soft-pack type battery cells 100 in a variably and expandable manner according to the capacity of the battery pack 10.

FIG. 7 is a diagram showing a partial cross section of the battery pack 10 according to the present disclosure.

Referring to body 7 , the battery pack case 300 may include a storage space V1 and a gas exhaust space V2 .

The storage space V1 may be used to accommodate a plurality of soft-pack type battery cells 100. The storage space V1 may be an inner space of the first housing 310.

The exhaust space V2 may be located around the storage space V1. The exhaust space V2 may be a space in the internal space of the second shell 320 excluding the space occupied by the first shell 310. The exhaust space V2 may be provided only on one side of the storage space V1, or may be provided on the entire periphery of the storage space V1. The flame and gas passing through the flame retardant portion 340 may be discharged to the outside of the battery pack housing 300 through the exhaust space V2. The storage space V1 and the exhaust space V2 may be configured to communicate with each other through the flame retardant portion 340. By separating the storage space V1 and the exhaust space V2, there is an advantage that the exhaust direction can be controlled in a desired direction.

FIG. 8 is an enlarged view of a portion of FIG. 7 .

8 , the flame-retardant portion 340 may include a separation portion 341 , a capture portion 342 , and a bonding portion 343 .

When there are multiple battery cell covers 200, the separator 341 may be disposed at corresponding positions between adjacent battery cell covers 200. At least a portion of the separator 341 may be located between the storage space V1 and the exhaust space V2. At least a portion of the separator 341 may be located within the first housing 310 that separates the storage space V1 from the exhaust space V2.

The capture portion 342 may be disposed at a position corresponding to the opening portion O of each battery cell cover 200. Here, the opening portion O may refer to a side located in the Y-axis extension direction of the battery cell unit U. The capture portion 342 may be located within the exhaust space V2. The capture portion 342 may be configured to have a certain space between the capture portion 342 and the first housing 310.

The coupling portion 343 may be configured to be coupled with the pack case 300. The coupling portion 343 may be configured to be in contact with the inner surface of the first case 310. The coupling may be performed by welding or bolting.

8 , the battery pack case 300 may include a receiving portion 311 .

8 and 4 , the receiving portion 311 may be configured to receive the flame retardant portion 340. The receiving portion 311 may be disposed on a side surface of the flame retardant portion 340 disposed on the first housing 310. The receiving portion 311 may be an open portion formed to allow the flame retardant portion 340 to be inserted.

The flame retardant portion 340 may be received in the receiving portion 311 by first inserting the flame retardant portion 340 into the inner space of the first housing 310 toward the receiving portion 311. In this case, the coupling portion 343 may be coupled by being caught on the inner surface of the first housing 310.

According to this structure of the present disclosure, the movement of flames and gases between adjacent battery cell units U can be blocked by the isolation portion 341. Therefore, the backflow of flames and gases can be prevented by this structure. This is to prevent backflow by making it difficult for flames and gases that have been discharged from the battery cell 100 to return to the battery cell 100 side. Therefore, when a thermal accident occurs inside the battery pack 10, it is possible to effectively prevent heat from propagating from one battery cell unit U where the thermal accident occurs to the battery cell 100 in another battery cell unit U. In addition, the combination between the flame retardant portion 340 and the battery pack housing 300 can be facilitated.

FIG. 9 is a diagram showing a portion of components of a battery pack according to the present disclosure.

9 , the battery pack 10 may further include a side assembly S. As shown in FIG.

The side assembly S may cover the open portion O of the battery cell cover 200. The side assembly S may be configured to cover the open portion O of the battery cell cover 200 formed on the side where the electrode lead 111 is provided. At least a portion of the side assembly S may be inserted into the battery cell cover 200. The side assembly S may be disposed on a side that is not surrounded by the respective battery cell covers 200 of each battery cell unit U. In this embodiment, the battery cell cover 200 surrounds at least three sides of the soft-pack type battery cell 100, and exposes the front and rear portions where the electrode lead 111 is provided and the bottom of the soft-pack type battery cell 100. Therefore, the side assembly S may be disposed in a portion of the soft-pack type battery cell 100 where the electrode lead is provided at the front and rear portions of the battery cell cover 200. At least a portion of the side assembly S may be inserted into the battery cell cover 200.

In the battery cell cover 200, a portion of the first cover portion 210 and a portion of the second cover portion 220 may protrude more than the top cover portion 230. A portion of the side component S may protrude more than the top cover portion 230, and another portion of the side component S may be inserted into and contact the inner side of the first cover portion 210 that protrudes more than the top cover portion 230 and the inner side of the second cover portion 220 that protrudes more than the top cover portion 230.

According to such a configuration of the present disclosure, the battery cell cover 200 and the side assembly S may be effectively combined into a structure in which the side assembly S is inserted into the battery cell cover 200 .

Fig. 10 is a diagram showing a bus bar assembly included in a battery pack according to the present disclosure. Fig. 11 is a diagram showing an end cover included in a battery pack according to the present disclosure. Fig. 12 is a diagram showing a middle cover included in a battery pack according to the present disclosure.

10 to 12 together with FIG. 9 , the side assembly S may include a bus bar assembly 400 , a middle cover 500 , and an end cover 600 .

The bus bar assembly 400 may be configured to be electrically connected to the electrode lead 111. The bus bar assembly 400 may be configured such that the electrode lead 111 is connected to the bus bar terminal 410 and the bus bar terminal 410 is fixed, and may include a bus bar frame 420 having a lead receiving portion 421 receiving the electrode lead 111.

The bus bar assembly 400 may have a groove 422 combined with the middle cover 500. The groove 422 may have a concave shape on an outer surface of the bus bar assembly 400 located in the negative Y-axis direction.

The end cap 600 may cover one side of the bus bar assembly 400. The end cap 600 may be configured to exhaust gas generated from at least a portion of the enclosed soft-pack type battery cell 100. The end cap 600 may include a first vent 610. The first vent 610 may be configured to exhaust gas and flame generated from at least a portion of the soft-pack type battery cell 100 enclosed by the battery cell cover 200.

The first vent 610 may be in the shape of a simple hole penetrating the end cap 600. In addition, it may not only be in a fully open form, but may also be a specific device that is closed but not fully open in a normal state, and may be opened according to changes in pressure or temperature. For example, the first vent 610 may be a one-way valve. This description of the first vent 610 may also be applied to the second vent 301 (see 301 in FIG. 1 ) of the battery pack housing 300 to be described later.

The first exhaust part 610 may include a mesh member M. The mesh member M may be configured to function as a flame arrester by being provided in the form of overlapping a plurality of porous metal plates. However, the mesh member M may also be provided between the middle cover 500 and the end cover 600 in the form of a mesh plate.

According to such a configuration of the present disclosure, when gas and flame are generated due to expansion or thermal runaway in the soft pack type battery cell 100, the gas and flame can be discharged to the outside of the battery cell unit U through the first vent portion 610 of the end cover 600. Therefore, by guiding the side exhaust, it is possible to prevent the gas and flame from being discharged arbitrarily through the opening portion of the battery cell cover 200. As described above, by including the battery cell cover 200 including the opening portion O and the end cover 600 combined with the opening portion O, the direction of the gas or flame can be guided to a specific direction, and a battery pack 10 having excellent expansion response performance can be provided.

In addition, since the first vent portion 610 is formed on the end cover 600 covering the open portion of the battery cell cover 200, the area of the first vent portion 610 can be smaller than the area covered by the open portion of the battery cell cover 200 or the end cover 600. Therefore, when the end cover 600 is provided, the exhaust angle of exhaust or flame can be minimized, thereby minimizing the spread of flame, compared with the case where the end cover 600 is not provided.

Therefore, the gas or flame exhausted through the first exhaust portion 610 is guided to the flame-retardant portion 340, so that the effect of delaying the flow of the gas or flame passing through the flame-retardant portion 340 can be maximized. As described above, a portion of the gas or flame exhausted through the first exhaust portion 610 is directly exhausted through the flame-retardant portion 340, and the remaining other gas or flame can continuously collide with the flame-retardant portion 340 in a portion of the space formed between the first housing 310 and the flame-retardant portion 340, thereby delaying exhaustion.

The end cap 600 may include a guide portion 620. The guide portion 620 may protrude in the positive Y-axis direction to form a surface having a predetermined width with an end of an inner surface of the end cap 600 located in the positive Y-axis direction. The guide portion 620 may be inserted and coupled between the battery cell cover 200 and the bus bar assembly 400.

9 and 12, the middle cover 500 may be disposed at one side of the bus bar assembly 400. The middle cover 500 may be disposed between the bus bar assembly 400 and the end cover 600. The middle cover 500 may include a communication portion 510. The middle cover 500 may include a hook 501. The hook 501 may protrude from an inner surface of the middle cover 500 in the positive Y-axis direction.

The middle cover 500 may include an insulating material, and the insulating material may block the electrical connection between the bus bar assembly 400 and the end cover 600 .

According to such a configuration of the present disclosure, the flow of flames that may occur in the soft pack type battery cell 100 can be mainly blocked by the middle cover 500, thereby reducing the intensity of the flames and preventing the flames from being quickly discharged into the first exhaust portion 610. In addition, a short circuit caused by contact between the bus bar assembly 400 and the end cover 600 can be prevented.

Describing the assembly process of the battery pack 10 according to the above embodiment, the battery cell 100 is surrounded by the battery cell cover 200, and then the bus bar assembly 400 is inserted into the open portion of the battery cell cover 200, and assembled. After the electrode lead 111 of the battery cell 100 penetrates the lead accommodating portion 421, it is bent and fixed to the bus bar terminal 410 by a known joining method such as welding. The middle cover 500 is assembled to the bus bar assembly 400. The end cover 600 is assembled to the middle cover 500. Next, the end cover 600 is welded. Due to the unique bonding structure of the bus bar assembly 400, the middle cover 500 and the end cover 600, the bonding between the bus bar assembly 400, the middle cover 500 and the end cover 600 can be easily and effectively performed.

FIG. 13 is a diagram showing a partial cross-section of a battery pack according to the present disclosure.

13 , the battery pack 10 may include a thermal resin R. As shown in FIG.

13 and 2, the thermal resin R may be inserted in at least a portion of the space between the battery cell cover 200 and the battery pack housing 300 and the space between the plurality of soft-pack type battery cells 100 and the battery pack housing 300. That is, the thermal resin R may be inserted in at least a portion of the space between the battery cell unit U and the battery pack housing 300. The thermal resin R may enhance the heat transfer performance between different components. The thermal resin R is intended to reduce the contact thermal resistance between different components. By including the thermal resin R, the heat dissipation performance of the soft-pack type battery cell 100 may be further enhanced, so that the cooling performance of the battery pack 10 may be further improved.

Referring again to FIG. 1 , the pack case 300 may include a second vent 301 .

The second exhaust portion 301 may be configured to communicate with the first exhaust portion 610 of the end cap 600 described with reference to FIG. 11 and the like, so as to discharge the gas and/or flame generated in at least one battery cell unit U contained inside the battery pack housing 300 to the outside of the battery pack 10. The second exhaust portion 301 is arranged at the farthest position from the first exhaust portion 610 to maximize the moving path of the gas and flame, thereby effectively reducing the intensity of the gas and flame. In the example shown, since the first exhaust portion 610 may be located at both ends of the battery pack housing 300 in the Y-axis direction, the farthest position from the first exhaust portion 601 is the middle position of the battery pack housing 300 in the Y-axis direction. The speed and temperature of the gas or flame discharged from the first exhaust portion 610 decrease when moving to the position of the second exhaust portion 301 in the exhaust space V, so that the gas or flame can be finally discharged to the outside of the battery pack 10 in a less threatening state. The detailed description of the second exhaust portion 301 may be replaced by the description of the first exhaust portion 610.

As described above, when a battery cell 100 catches fire, the battery cell cover 200 controls the initial flame direction. The flame retardant portion 340 reduces the intensity of the gas and flame discharged from the opening portion O of the battery cell cover 200, and prevents the gas and flame from flowing back to other adjacent battery cells 100. The discharge angle of the gas and flame discharged through the flame retardant portion 340 can be minimized by the end cover 600, thereby further minimizing the spread of the flame. In this way, the battery pack 10 of the present disclosure can ensure excellent safety in the event of a thermal accident.

The battery pack 10 according to the present disclosure may also include a battery management system (BMS) and a battery disconnect unit (BDU). The BMS is installed in the internal space of the battery pack housing 300 and may be configured to generally control the charge/discharge operation or data transmission/reception operation of the soft-pack type battery cell 100. The BMS may be provided in the battery pack unit 10, rather than in the battery module unit. More specifically, the BMS may be provided to control the charge/discharge state, power state, performance state, etc. of the soft-pack type battery cell 100 through the battery pack voltage and the battery pack current. The BMS evaluates the state of the battery cell 100 within the battery pack 10 and manages the battery pack 10 using the evaluated state information. For example, the state information of the battery pack 10, such as the state of charge (SOC), the state of health (SOH), the maximum input/output power tolerance, the output voltage, etc., is evaluated and managed. In addition, the state information may be used to control the charging or discharging of the battery pack 10, and further evaluate the replacement time of the battery pack 10. The BDU may be configured to control the electrical connection of the battery cell 100 to manage the power capacity and function of the battery pack 10. To this end, the BDU may include a power relay, a current sensor, a fuse, etc. The BDU may also be provided in the battery pack unit 10 instead of in the battery module unit, and may employ various blocking units known at the time of filing the present disclosure.

In addition, the battery pack 10 according to the present disclosure may also include various components of the battery pack 10 known at the time of filing the present disclosure. For example, the battery pack 10 according to the embodiment of the present disclosure may also include a manual service disconnector (MSD) that allows an operator to manually disconnect the service plug to cut off the power supply. In addition, a flexible bus bar or cable for interconnecting a plurality of battery cells 100 having an n×n arrangement as described above may also be included.

However, the present disclosure may apply the above-mentioned structure applied to the battery pack 10 to a battery module. That is, by applying the structure of the battery pack housing 300 to the module housing, a plurality of battery cell units U may be accommodated in the module housing, and a vent may be provided in the module housing, thereby configuring a battery module. One or more of the battery modules are accommodated in the internal space of the battery pack housing 300, and the battery module includes a plurality of soft-pack type battery cells 100 and a battery cell cover 200 as described above, and may include a module housing that accommodates the soft-pack type battery cells 100 in its internal space (the structure of the battery pack housing 300 of the battery pack 10 according to the present disclosure as described above may be used as it is).

The battery pack 10 according to the present disclosure or the battery module described herein can be applied to various devices. These devices generally include transportation devices such as electric bicycles, electric vehicles 1, hybrid vehicles 1, etc., but the present disclosure is not limited thereto. In particular, the battery pack 10 is suitable for use as a battery pack 10 of an electric vehicle 1. In addition, it can be used as an energy source for ESS.

FIG. 14 is a diagram showing a vehicle according to the present disclosure.

14 , a vehicle 1 may include the battery pack 10 according to the present disclosure described above. In addition, in addition to the battery pack 10, the vehicle 1 according to the present disclosure may further include various other components included in the vehicle 1. For example, in addition to the battery pack 10 according to the present disclosure, the vehicle 1 according to the present disclosure may further include a vehicle body, an engine, a control device such as an electronic control unit (ECU), and the like.

The battery pack 10 may be provided at a predetermined position in the vehicle 1. The battery pack 10 may be used as an electric energy source for driving the vehicle 1 by providing a driving force to an engine of the electric vehicle 1. In this case, the battery pack 10 has a high rated voltage of 100V or more.

The battery pack 10 can be charged or discharged by the inverter according to the driving of the engine and/or the internal combustion engine. The battery pack 10 can be charged by a regenerative charging device combined with a brake. The battery pack 10 can be electrically connected to the engine of the vehicle 1 through an inverter.

In this way, the battery pack 10 provided in the vehicle 1 can provide electric energy required for various operations of the vehicle 1. In addition, since the battery pack 10 has the various effects described above, the vehicle 1 including the battery pack 10 can also have such effects.

In a specific example, the battery pack 10 can omit the module housing by including a battery cell cover 200, and thus can have a high energy density. Energy density refers to the amount of energy stored per unit weight. When the energy density of the battery pack 10 increases, more energy is stored in the battery pack 10 of the same weight. Therefore, a vehicle 1 including such a battery pack 10 can have various utilization potentials, such as increasing the mileage per charge, accelerating faster, loading more luggage, making the interior space larger, etc. In addition, when the energy density of the battery pack 10 increases, it becomes lighter at the same energy. When the battery pack 10 becomes lighter and the vehicle 1 including the battery pack 10 becomes lighter, this also has several advantages such as improved acceleration, improved energy efficiency, and improved durability.

For another specific example, the battery pack 10 can have a higher degree of safety. Since the vehicle 1 is an object directly related to human life, safety can never be compromised. In the soft-pack type battery cell 100, there is always a risk of fire due to the physical properties of lithium. However, the battery pack 10 according to the present disclosure includes a battery cell cover 200, so even if a thermal accident occurs in the soft-pack type battery cell 100, it can be prevented from being transmitted to other parts. Therefore, the fire safety of the vehicle 1 including the battery pack 10 is ensured.

As described above, the present disclosure has been described mainly with reference to the accompanying drawings in preferred embodiments, but it is obvious to those skilled in the art that many and various obvious modifications can be made from the description without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure should be interpreted by the claims written as examples including such many modifications.

[Explanation of Reference Numerals]

1: Vehicle

10: Battery Pack

U: Battery unit

100: Battery cell

111: Electrode lead

110: Storage

120: Sealing part

200: Battery cell cover

210: First cover

220: Second cover

230: Top cover

300: Battery pack housing

301: Second exhaust section

310: First shell

311: Accommodation

V1: Storage Space

320: Second shell

V2: Exhaust space

330: Top cover

340: Flame retardant part

341: Isolation Department

342: Capture Department

343: Joint

S: Side components

400: Busbar assembly

410: Busbar terminal

420: Busbar frame

421: Lead wire accommodation portion

422: Groove

500: Middle cover

510: Connectivity

501: Hook

600: End cap

610: First exhaust section

620: Guidance Department

M; reticular part

R: Resin

O: Open Department

Claims (20)

1. A battery pack comprising: Multiple soft pack battery cells; a battery pack housing, the plurality of soft-pack type battery cells being accommodated in an inner space of the battery pack housing; and a battery cell cover configured to partially surround the exterior of at least one of the plurality of soft-pack-type battery cells to form an open portion, Wherein, a flame retardant portion is included on one side of the battery pack housing where the open portion is located. 2 . The battery pack according to claim 1 , wherein the flame-retardant portion is configured to reduce a linearity of passage of gas and flame generated from the at least one pouch-type battery cell through the flame-retardant portion. 3. The battery pack according to claim 2, wherein the internal space of the battery pack housing comprises: a storage space for accommodating the plurality of soft-pack type battery cells; and an exhaust space, the exhaust space surrounding the storage space, The gas and flame that have passed through the flame retardant portion may be exhausted to the outside of the battery pack housing through the exhaust space. 4. The battery pack according to claim 3, wherein the battery cell cover is multiple, Furthermore, the flame retardant portion includes: a separator provided at a corresponding position between adjacent battery cell covers; and A catch portion is provided at a position corresponding to the opening portion of each of the battery cell covers. 5. The battery pack according to claim 4, wherein at least a portion of the partition is located between the storage space and the exhaust space, and The capture portion is located in the exhaust space. 6 . The battery pack according to claim 1 , wherein the pack case comprises a receiving portion configured to receive the flame-retardant portion. 7 . The battery pack according to claim 4 , wherein the flame-retardant portion comprises a combining portion configured to be combined with the battery pack case. 8 . The battery pack according to claim 3 , wherein the flame-retardant portion is a wedge-shaped structure having a cross-section of at least one end portion including a wave shape. 9. The battery pack according to claim 1, wherein the battery cell cover comprises: a first cover portion, the first cover portion covering one side surface of the surrounded soft-pack type battery cell; a second cover portion, the second cover portion covering the other side surface of the surrounded soft-pack type battery cell; and A top cover portion connects the first cover portion and the second cover portion and covers one side of the surrounded soft-pack type battery cell. 10. The battery pack according to claim 9, wherein the plurality of soft-pack type battery cells each include an electrode lead, and The opening portion is formed at an end portion of the first cover portion of the battery cell cover on a side where the electrode lead is disposed and at an end portion of the second cover portion on a side where the electrode lead is disposed. 11 . The battery pack according to claim 10 , further comprising a side member covering the open portion. 12 . The battery pack according to claim 11 , wherein at least a portion of the side assembly is inserted into the battery cell cover. 13. The battery pack according to claim 12, wherein the side assembly comprises: a bus bar assembly configured to be electrically connected to the electrode lead; and An end cap covers one side of the bus bar assembly and is configured to discharge gas generated from at least a portion of the surrounded pouch-type battery cell. 14 . The battery pack according to claim 13 , wherein the side assembly includes a middle cover between the bus bar assembly and the end cover for insulation. 15. The battery pack according to claim 11, wherein the side assembly comprises a mesh. 16 . The battery pack according to claim 1 , comprising a thermal resin in at least a portion of a space between the battery cell cover and the pack case and a space between the plurality of pouch type battery cells and the pack case. 17 . The battery pack according to claim 9 , wherein the battery cell cover is configured to support the pouch type battery cell in a state of standing between the first cover portion and the second cover portion. 18 . The battery pack according to claim 9 , wherein the battery cell cover comprises an insulating coating on at least a portion of an inner surface of the first cover portion and an inner surface of the second cover portion. 19 . The battery pack according to claim 9 , wherein the battery cell cover comprises an adhesive member on at least a portion of an outer surface of the first cover portion and an outer surface of the second cover portion. 20. A vehicle comprising the battery pack according to any one of claims 1 to 19.