Battery pack with a gas vent path

Abstract

The battery pack according to the present invention includes a plurality of battery modules and a pack case that houses the plurality of battery modules. The pack case includes an internal space for housing the battery modules, a pack tray provided so that the upper part is open, and a pack cover that covers the upper part of the pack tray, is coupled to the pack tray, and incorporates a gas vent path that communicates with each of the battery modules.

Description

Technical Field

[0001] The present invention relates to a battery pack, and more particularly, to a battery pack having a gas vent path that prevents gas ejected from a battery module when a thermal event occurs in the battery module from being transmitted to other battery modules and allows the gas to be smoothly discharged to the outside of the pack case.

[0002] This application claims priority based on Korean Patent Application No. 10-2022-0126569 filed on October 4, 2022, and all of the content disclosed in the specification and drawings of the application is incorporated herein.

Background Art

[0003] Secondary batteries not only have the primary advantage of significantly reducing the use of fossil fuels, but are also environmentally friendly in that they produce no by-products from energy use, and are attracting attention as a new energy source for improving energy efficiency.

[0004] Accordingly, the application of secondary batteries to various devices is increasing. For example, they are widely used as an energy source for wireless mobile devices or wearable devices, which are multifunctional small products, and are also used as an energy source or an energy storage system (ESS) for electric vehicles and hybrid electric vehicles proposed as alternatives to existing gasoline vehicles and diesel vehicles.

[0005] In recent years, commonly used lithium secondary batteries have an operating voltage of about 2.5V to 4.5V per cell. Therefore, in the case of electric vehicles and energy storage systems that require high capacity and high output, a battery module in which a plurality of lithium secondary batteries are connected in series and / or in parallel, and a battery pack in which the battery modules are connected in series and / or in parallel are configured and used as an energy source.

[0006] The number of lithium secondary batteries included in one battery module may increase according to the output and capacity of the battery pack required for an electric vehicle, or the number of battery modules included in one battery pack may increase.

[0007] However, in the case of a battery pack including a plurality of lithium secondary batteries as described above, if a fire or explosion occurs, the damage will be even greater.

[0008] For example, when an event such as a short circuit or abnormal temperature rise between lithium secondary batteries occurs in some battery modules, if a large amount of vent gas is generated in the lithium secondary batteries and the deterioration becomes severe, high-temperature particles (or sparks) including electrode active materials and aluminum particles may be ejected together with the vent gas. At this time, the vent gas and particles may cause thermal damage to adjacent battery modules, thereby greatly increasing the risk of further thermal events occurring in other battery modules.

[0009] Therefore, when a thermal event occurs in a battery module, it is necessary to prevent the gas and particles ejected from the battery module from being transmitted to other adjacent battery modules. Also, when the amount of gas inside the battery pack increases, the battery pack may structurally collapse or explode due to pressure, so it is necessary to smoothly discharge the gas to the outside. Summary of the Invention Problems to be Solved by the Invention

[0010] The present invention was devised to solve the above technical problems, and when a thermal event occurs in a battery module, it is to prevent the gas and particles ejected from the battery module from being transmitted to other adjacent battery modules, and in particular, to provide a battery pack capable of smoothly discharging gas to the outside of the pack case.

[0011] The technical problem to be solved by the present invention is not limited to the above problems, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention below.

Means for Solving the Problem

[0012] The battery pack according to the present invention includes a plurality of battery modules and a pack case for housing the plurality of battery modules. The pack case includes an internal space for housing the battery modules, a pack tray provided so that the upper part is open, and a pack cover that covers the upper part of the pack tray and is coupled to the pack tray and incorporates a gas vent path communicating with each battery module.

[0013] The gas vent path may include at least one first vent path extending in a first direction and at least one second vent path extending in a second direction intersecting the first direction and communicating with the at least one first vent path.

[0014] There are a plurality of the first vent paths, which are located in regions of both opposing edge portions of the pack cover and include two outer paths extending in the first direction and at least one inner path located between the two outer paths and extending in the first direction. The at least one second vent path may be configured such that the two outer paths and the inner path intersect.

[0015] The gas vent path may further include a mesh filter at a portion where the first vent path and the second vent path intersect.

[0016] The mesh size of the mesh filter may become smaller as it is closer to the outlet of the gas vent path.

[0017] Each battery module is provided with a gas vent hole on the upper surface, and the pack cover may be provided with a connecting pipe connecting the gas vent hole and the gas vent path.

[0018] The gas vent hole can be covered with a packing member provided so as to rupture at a pressure equal to or higher than a certain pressure.

[0019] The pack cover includes a tray connection portion provided so as to protrude from one end portion of the first vent path to the outside of the pack cover, and the pack tray includes a gas discharge port through which gas is discharged to the outside, a connection groove portion provided so as to be engageable with the tray connection portion, and a duct portion provided inside the main body of the pack tray so that the connection groove portion communicates with the gas discharge port.

[0020] The pack tray includes at least one first partition wall that partitions an internal space, and the pack cover includes a second partition wall that engages with the first partition wall, and the adjacent battery modules can be configured to be spatially blocked by the first partition wall and the second partition wall.

[0021] The first partition wall includes an upper end groove portion formed by being recessed by a predetermined depth from the surface of the upper end, and the second partition wall may include an insertion portion provided so as to be insertable into the upper end groove portion.

[0022] The insertion portion includes a recess portion provided to be recessed inward, and the upper end groove portion may include a pressing portion provided so as to be shape-matched with the recess portion when the insertion portion is sandwiched in the upper end groove portion.

[0023] The gas vent path may include a plurality of unit gas vent paths that communicate one-to-one with the plurality of battery modules.

[0024] According to another aspect of the present invention, an automobile including the above-described battery pack can be provided.

Advantages of the Invention

[0025] According to one aspect of the present invention, when a thermal event occurs in a battery module, it is possible to provide a battery pack that prevents gas and particles ejected from the battery module from being transmitted to other adjacent battery modules and enables the gas to be smoothly discharged to the outside of the pack case.

[0026] In particular, in the battery pack according to one aspect of the present invention, a gas vent path is provided in a pack cover that covers the upper part of the battery module, and the gas vent path branches into a plurality of paths. Therefore, even if particles accumulate in such a gas movement path and obstruct the gas flow in the gas movement path, the gas can escape to other gas movement paths.

[0027] Also, a mesh filter is applied to each region where the gas vent paths intersect, and a mesh filter with a smaller mesh size is applied closer to the outlet side of the gas vent path, making it difficult for particles to escape to the outside of the battery pack.

[0028] The effects of the present invention are not limited to the effects described above, and other effects of the present invention not mentioned will be clearly understood by those having ordinary knowledge in the technical field to which the present invention pertains from the present specification and the accompanying drawings.

Brief Description of the Drawings

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Mode for Carrying Out the Invention

[0030] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms and words used in this specification and the claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventors themselves should interpret them in accordance with the meaning and concept corresponding to the technical idea of the present invention in accordance with the principle that they can appropriately define the concept of the terms in order to explain the invention in the best way. Therefore, it should be understood that the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, and thus there can be various equivalents and modification examples that can replace them at the time of this application.

[0031] FIG. 1 is an assembled perspective view of a battery pack according to an embodiment of the present invention, FIG. 2 is a perspective view schematically showing the configuration of the battery pack with the pack tray and the pack cover of FIG. 1 separated, FIG. 3 is a schematic cross-sectional view of the battery pack taken along line A-A' of FIG. 1, and FIG. 4 is a schematic longitudinal sectional view of the battery pack of FIG. 1.

[0032] Referring to FIGS. 1 to 4, a battery pack 10 according to an embodiment of the present invention includes a plurality of battery modules 100 and a pack case, and the pack case 200 is provided with gas vent paths 221 and 222 that communicate with each battery module 100. The gas vent paths 221 and 222 are passages for discharging vent gas to the outside of the pack case 200 when a thermal event occurs in any of the battery modules 100 included in the battery pack 10.

[0033] In the process of discharging the vent gas to the outside of the battery pack case 200, the battery pack 10 according to the present invention is configured such that other battery modules 100 are not damaged by heat as much as possible, and high-temperature particles (such as fragments of electrode plates or active materials ejected from battery cells) are made difficult to escape to the outside of the battery pack 10, thereby preventing the high-temperature particles from becoming an ignition source outside the battery pack 10. Thus, gas vent paths 221 and 222 can be configured. Hereinafter, the configuration of the pack case 200 provided with such gas vent paths 221 and 222 will be described in detail.

[0034] The pack case 200 according to an embodiment of the present invention includes a pack tray 210 and a pack cover 220 that are provided to be mutually coupled. As shown in FIGS. 1 and 2, the pack tray 210 includes an internal space for accommodating a plurality of battery modules 100 and may be provided with an open top.

[0035] For example, the pack tray 210 may include a base portion 211 that supports the lower portion of the battery module 100 and a wall portion that forms a wall along the outer peripheral edge of the base portion 211. The base portion 211 is provided in a substantially square plate shape, and the wall portion may include a first wall, a second wall, a third wall, and a fourth wall that form a wall along the outer peripheral edge of the square plate-shaped base portion 211. For example, in the implementation configuration of FIG. 2, the wall portion may include a first wall 212 in the +X direction, a second wall 213 in the -Y direction, a third wall 214 in the -X direction, and a fourth wall 215 in the +Y direction. The pack cover 220 covers the upper portion of the pack tray 210 and may be provided to be coupled to the pack tray 210.

[0036] In particular, the pack cover 220 according to the present embodiment includes gas vent paths 221 and 222 inside. In other words, the gas vent paths 221 and 222 can be provided so as to be built into the frame forming the pack cover 220 as shown in FIG. 3. By incorporating the gas vent paths 221 and 222 into the pack cover 220 in this way, the space where the battery module 100 is disposed inside the pack case 200 and the space through which the vent gas moves can be separated. In particular, by incorporating the gas vent paths 221 and 222 into the pack cover 220 with a large area, the discharge path of the vent gas can be diversified, and the volume of the region where the gas can move or the entire passage can also be increased. Therefore, the gas vent path of the present invention has an effect of smoothly discharging the vent gas to the outside of the battery pack even when a large amount of vent gas is generated.

[0037] Also, since the vent gas generated in any battery module 100 is configured to move along the gas vent path built into the pack cover 220, it does not flow into the space where the battery module 100 is disposed. Therefore, since the vent gas does not come into direct contact with other battery modules 100, other battery modules 100 are less likely to be damaged by heat.

[0038] The battery module 100 may include a battery cell 110 and a module housing that houses the battery cell 110. The battery cell 110 is applicable to any form of secondary battery such as a prismatic secondary battery, a cylindrical secondary battery, or a pouch-type secondary battery, and the module housing can be provided with a material having high mechanical rigidity capable of protecting the battery cell 110 from external impacts and vibrations, desirably, a metal material.

[0039] As shown in FIG. 2, each battery module 100 may be disposed on the pack tray 210 and may include a gas vent hole 121 on its upper surface. And each battery module 100 can be configured such that the gas vent hole 121 is individually connected to the gas vent path of the pack cover 220.

[0040] The upper surface of the battery module 100 means the upper plate of the module housing that covers the upper part of the battery cell 110, and the gas vent hole 121 may be formed by partially cutting or perforating the upper plate of the module housing. For example, when there is a problem of ignition due to a short circuit or overcharge of the battery cell 110, flames, high-temperature particles, and vent gas can be generated in the battery cell 110. At this time, the vent gas can be discharged from the inside of the battery module 100 to the outside through the gas vent hole 121. A packing member 122 may be attached to the gas vent hole 121. The packing member 122 seals the gas vent hole 121 during normal times to prevent foreign substances from flowing into the inside of the housing of the battery module 100 from the outside.

[0041] The packing member 122 may be made of a material that ruptures at a pressure above a certain level or melts by heat, for example, a plastic material. That is, when there is a problem of internal ignition of the battery module 100, the packing member 122 made of plastic material disappears due to gas pressure or heat, and the gas vent hole 121 is opened.

[0042] The gas vent hole 121 may be configured to communicate with the gas vent path of the pack cover 220. For this purpose, the pack cover 220 may further include a connecting pipe 225 that connects the gas vent hole 121 and the gas vent path. The connecting pipe 225 may be configured to have flexibility and expandability, for example, in the form of a bellows.

[0043] As shown in FIGS. 3 and 4, the pack cover 220 includes a connecting pipe 225, and when coupling to the pack tray 210, the connecting pipe 225 may be configured to be vertically matched with the gas vent hole 121 of the corresponding battery module 100. One end of the connecting pipe 225 may communicate with the gas vent path, and the other end may protrude from the surface of the pack cover 220 to cover the gas vent hole 121 of the battery module 100.

[0044] With such a configuration, when a thermal event occurs, the vent gas of each battery module 100 can completely flow into the gas vent path of the pack cover 220. Thereby, it is possible to prevent the transfer of the vent gas to other battery modules 100 around it.

[0045] Referring further to FIG. 3, the gas vent path of the pack cover 220 according to an embodiment of the present invention includes at least one first vent path 221 extending in a first direction (X direction), and at least one second vent path 222 extending in a second direction (Y direction) intersecting the first direction and communicating with the at least one first vent path 221.

[0046] There are a plurality of the first vent paths 221, which are located at both opposite edges of the pack cover 220, and may include two outer paths 221a, 221b extending in the first direction, and at least one inner path 221c located between the two outer paths 221a, 221b and extending in the first direction.

[0047] The second vent path 222 may be configured to extend in a second direction (Y direction) intersecting the two outer paths 221a, 221b and the inner path 221c and communicate with each other at the intersecting portions. There are a plurality of such second vent paths 222, and the plurality of second vent paths 222 may be configured at regular intervals along the first direction. The pack cover 220 of this embodiment is provided with three second vent paths 222a, 222b, 222c at intervals corresponding to the width of the battery module 100 along the first direction (X direction), but the scope of the rights of the present invention is not limited thereto. That is, for example, the pack cover 220 may be configured such that two or four or more second vent paths 222 are incorporated in the pack cover 220.

[0048] According to such a configuration, the paths through which the vent gas can move to the gas outlet 219 of the battery pack 10 become more diverse. That is, the vent gas can move not only along the two outer paths 221a and 221b at both edges of the pack cover 220, but also along a plurality of second vent paths 222 that intersect the two outer paths 221a and 221b. For example, if a large amount of particles accumulate in a specific part of the gas vent path, the flow of the vent gas may be obstructed. However, according to the configuration of the gas vent path in this embodiment, since the paths through which the vent gas can move become diverse, the vent gas can avoid the area where the particles have accumulated and move through other paths.

[0049] In particular, the large-capacity battery pack 10 includes a large number of battery modules 100. When a situation occurs in which vent gas and particles are simultaneously generated in one or more battery modules 100 included in such a large-capacity battery pack 10, in order to discharge the vent gas smoothly and quickly, a gas vent path configured to utilize the large area of the pack cover 220 to diversify the gas movement paths, as in this embodiment, is effective.

[0050] As shown in FIGS. 3 and 4, the gas vent path may further include a mesh filter 223 at a portion where the first vent path 221 and the second vent path 222 intersect. When high-temperature particles are discharged to the outside of the battery pack 10, they may become an ignition source outside the battery pack 10. At this time, the mesh filter 223 serves to block the movement of the particles so that the particles are not discharged to the outside of the battery pack 10. In particular, the mesh filters 223a, 223b, 223c according to this embodiment may be applied to the gas vent path such that the mesh size is smaller closer to the outlet of the gas vent path, i.e., the gas discharge port 219. According to this, when the vent gas and the particles move together as indicated by the arrow in FIG. 4, the particles can be filtered n times or more (n is a natural number). Also, since the mesh sizes of the mesh filters 223a, 223b, 223c are configured to decrease sequentially, it is possible to effectively disperse the amount of particles accumulated in the gas vent path between one mesh filter 223 and another mesh filter 223 according to size. Further, as the particles pass through the mesh filter 223, the temperature decreases by heat exchange with the mesh filter made of a metal material, and finally, only low-temperature ultrafine particles can be discharged to the outside of the battery pack 10.

[0051] Referring further to FIGS. 2, 3 and 4, the pack cover 220 includes a tray connection portion 226 provided so as to protrude from one end of the first vent path 221 to the outside of the pack cover 220. The pack tray 210 includes a gas discharge port 219 through which gas is discharged to the outside, a connection groove portion 217 provided to be engageable with the tray connection portion 226, and a duct portion 218 provided inside the main body of the pack tray 210 so that the connection groove portion 217 and the gas discharge port 219 communicate with each other.

[0052] For example, as shown in FIG. 2, a connecting groove portion 217 is provided in a corner region of the packet tray 210 where the first wall body 212 intersects with the second wall body 213 and the fourth wall body 215, and in a central region of the first wall body 212. The tray connection portion 226 can be configured to project downward from the surface of the pack cover 220 in a form that can be fitted and connected in the vertical direction and the fitted connection can be released in such a connecting groove portion 217.

[0053] The tray connection portion 226 can be configured to correspond to the number of the first vent paths 221 and communicate with the first vent paths 221. For example, as shown in FIG. 3, the tray connection portion 226 can be provided at one end of each of two outer paths 221a and 221b and one inner path 221c. On the other hand, in this embodiment, although there is one inner path 221c, different from this embodiment, two or three or more inner paths 221c may be formed in the pack cover 220, and the tray connection portion 226 can be provided at each end of each inner path 221c.

[0054] When the pack cover 220 and the packet tray 210 are coupled to each other, the tray connection portion 226 of the pack cover 220 and the connecting groove portion 217 of the packet tray 210 can be connected to each other by an interference fit as shown in FIG. 4. And, as shown by the hidden line in FIG. 3, the connecting groove portion 217 of the packet tray 210 can be configured to communicate with the gas discharge port 219 through the duct portion 218 built in the first wall body 212 of the packet tray 210. With such a configuration, the gas vent path of the pack cover 220 communicates with the gas discharge port 219 of the packet tray 210, and the vent gas is finally discharged from the gas discharge port 219 to the outside of the battery pack 10.

[0055] On the one hand, the battery pack 10 according to an embodiment of the present invention can be configured such that the internal space of the pack case 200 is partitioned to block heat transfer between the battery modules 100 when a thermal event occurs. For this purpose, the pack tray 210 includes at least one first partition wall 216 that partitions the internal space, and the pack cover 220 includes a second partition wall 224 that fits and couples with the first partition wall 216. When the pack cover 220 and the pack tray 210 are coupled as shown in FIG. 4, the adjacent battery modules 100 can be configured to be spatially blocked by the first partition wall 216 and the second partition wall 224.

[0056] More specifically with reference to FIGS. 4 and 5, the first partition wall 216 of the pack tray 210 includes an upper end groove portion 216a formed by being recessed a predetermined depth from the upper end surface, and the second partition wall 224 of the pack cover 220 may include an insertion portion 224a provided to be insertable into the upper end groove portion 216a. Therefore, when the pack cover 220 and the pack tray 210 are coupled to each other, the first partition wall 216 and the second partition wall 224 are connected, and the internal space of the pack case 200 can be partitioned into a plurality of parts. For example, the space between the side surface portion 120A of the module case of any one battery module 100 and the side surface portion 120B of another battery module 100 can be blocked by the first partition wall 216 and the second partition wall 224 that are fitted and coupled. Therefore, when a thermal event occurs in any one of the battery modules 100, heat transfer to the adjacent other battery module 100 can be maximally delayed.

[0057] FIG. 6 shows a modification of the first partition wall 216 and the second partition wall 224 in FIG. 5, and shows a state in which the fastening force between the first partition wall 216 and the second partition wall 224 is reinforced. The insertion portion 224a of the second partition wall 224 according to the embodiment of FIG. 6 includes a concave portion 224b provided in an inwardly recessed form, and the upper end groove portion 216a of the first partition wall 216 includes a pressing portion 216b that is shaped to match the concave portion 224b.

[0058] When the insertion portion 224a of the second partition wall 224 is completely sandwiched between the upper end groove portions 216a of the first partition wall 216, as shown in FIG. 6, the concave portion 224b and the pressing portion 216b can be shaped to fit each other. If the pressing portion 216b is not opened to secure a space, since the concave portion 224b has a structure that makes it difficult to come out of the pressing portion 216b, such a structure can advantageously act to strengthen the fastening force between the first partition wall 216 and the second partition wall 224.

[0059] FIG. 7 is a cross-sectional view schematically showing a battery pack 10 according to another embodiment of the present invention, and FIG. 8 is a partially enlarged view of the gas vent path portion of FIG. 7.

[0060] The same member numbers as those in the above-described embodiments indicate the same members, duplicate descriptions of the same members are omitted, and the description will be centered on the differences from the above-described embodiments.

[0061] The gas vent path according to another embodiment of the present invention may include a plurality of unit gas vent paths 228a, 228b, 228c, 228d that communicate one-to-one with the plurality of battery modules 100.

[0062] Also in the case of the battery pack 10 according to another embodiment of the present invention, the gas vent path may be built in the pack cover 220 as in the above-described embodiment, and may be configured to communicate with each battery module 100. However, in another embodiment of the present invention, the gas movement paths corresponding to the inner path 221c and the second vent path 222 among the first vent paths 221 of the above-described embodiment are omitted. Further, in the above-described embodiment, the outer paths 221a, 221b of the first vent path 221 communicate with a plurality of battery modules 100, but the gas vent path according to another embodiment of the present invention is configured to communicate individually with any one of the unit gas vent paths 228a, 228b, 228c, 228d in one battery module 100, as shown in FIGS. 7 and 8.

[0063] According to the configuration of the gas vent path according to another embodiment of the present invention as described above, the vent gas generated in each battery module 100 can move along each unit gas vent path 228a, 228b, 228c, 228d and be discharged from the gas discharge port 219 to the outside of the battery pack 10.

[0064] Therefore, for example, the vent gas generated in any one of the battery modules 100 will move along the unit gas vent paths 228a, 228b, 228c, 228d connected to the any one of the battery modules 100, so the possibility of flowing into the inside of other battery modules 100 is extremely low.

[0065] Also, even when a situation occurs where vent gas and particles are ejected simultaneously and multiply in a plurality of battery modules 100, the particles ejected from different battery modules 100 will not accumulate in the different unit gas vent paths 228a, 228b, 228c, 228d, so particles will not excessively accumulate in each unit gas vent path 228a, 228b, 228c, 228d. In addition, since the vent gas of each battery module 100 moves along each unit gas vent path 228a, 228b, 228c, 228d, the flow is smooth, and the moving distance of the vent gas to the gas discharge port 219 is also shortened compared to the above-described embodiment, so the vent gas can be discharged to the outside of the battery pack 10 more quickly.

[0066] On the other hand, the battery pack according to the present invention can be applied to automobiles such as electric vehicles and hybrid vehicles. That is, the automobile according to the present invention may include the battery pack according to the present invention. The battery pack may be provided, for example, in the vehicle body frame under the seat of the vehicle or in the trunk space.

[0067] In addition, in this specification, terms indicating directions such as up, down, left, right, front, and back are used, but it is obvious to those skilled in the art that such terms are only for convenience of explanation and can change depending on the position of the object and the position of the observer.

[0068] As described above, the present invention has been explained by way of limited embodiments and drawings. However, the present invention is not limited thereto, and various modifications and variations can be made within the equivalent scope of the technical idea of the present invention and the claims by those having ordinary knowledge in the technical field to which the present invention pertains.

Explanation of Reference Numerals

[0069] 10 Battery Pack 100 Battery Module 110 Battery Cell 120A Side Portion 120B Side Portion 121 Gas Vent Hole 122 Packing Member 200 Pack Case 210 Pack Tray 211 Base Portion 212 First Wall 213 Second Wall 214 Third Wall 215 Fourth Wall 216 First Partition 216a Upper End Groove 216b Pressing Portion 217 Connecting Groove 218 Duct Portion 219 Gas Outlet 220 Pack Cover 221 First Vent Path 221a Outer Path 221b Outer Path 221c Inner Path 222 Second Vent Path 222a Second Vent Path 222b Second Vent Path 222c Second Vent Path 223 Mesh Filter 223a Mesh Filter 223b Mesh Filter 223c Mesh Filter 224 Second Partition Insertion part 224a Recessed part 224b Connecting pipe 225 Tray connection part 226 Unit gas vent path 228a Unit gas vent path 228b Unit gas vent path 228c Unit gas vent path 228d

Claims

1. A battery pack including a plurality of battery modules and a pack case for housing the plurality of battery modules, wherein the pack case comprises a pack tray provided with an internal space for housing the plurality of battery modules and having an open top, and a pack cover covering the top of the pack tray and coupled to the pack tray, and incorporating a gas vent path communicating with each of the battery modules, characterized by the battery pack.

2. The gas vent path includes at least one first vent path extending in a first direction and at least one second vent path extending in a second direction intersecting the first direction and communicating with the at least one first vent path, characterized by the battery pack according to Claim 1.

3. There are a plurality of the first vent paths, including two outer paths located in regions of opposite edges of the pack cover and extending in the first direction, and at least one inner path located between the two outer paths and extending in the first direction, wherein the at least one second vent path is characterized in that the two outer paths and the inner path intersect, according to the battery pack of Claim 2.

4. The gas vent path further includes a mesh filter at a portion where the first vent path and the second vent path intersect, according to the battery pack of Claim 2.

5. There are a plurality of the mesh filters, wherein the mesh size of the mesh filters becomes smaller as it is closer to the outlet of the gas vent path, according to the battery pack of Claim 4.

6. Each of the battery modules is provided with a gas vent hole on its upper surface, wherein the pack cover is provided with a connecting pipe connecting the gas vent hole and the gas vent path, according to the battery pack of Claim 1.

7. The battery pack according to Claim 6, characterized in that the gas vent hole is covered with a packing member provided to rupture at a pressure equal to or higher than a certain pressure.

8. The pack cover is provided with a tray connection portion provided to protrude outward from one end of the first vent path, The pack tray has a gas discharge port through which gas is discharged to the outside, A connecting groove portion provided so as to be engageable with the tray connecting portion, A duct portion provided inside the main body of the packet tray so that the connecting groove portion communicates with the gas discharge port, and the battery pack according to claim 2 is characterized by including the duct portion.

9. The packet tray includes at least one first partition wall that partitions an internal space, The packet cover includes a second partition wall that engages with the first partition wall, The battery pack according to claim 1, wherein the adjacent battery modules are configured to be spatially blocked by the first partition wall and the second partition wall.

10. The first partition wall includes an upper end groove portion formed by being recessed by a predetermined depth from the surface of the upper end, and the second partition wall includes an insertion portion provided so as to be insertable into the upper end groove portion. The battery pack according to claim 9 is characterized by including the insertion portion.

11. The insertion portion includes a recess portion provided so as to be recessed inward, The upper end groove portion includes a pressing portion provided so as to be shape - fitted with the recess portion when the insertion portion is sandwiched in the upper end groove portion. The battery pack according to claim 10 is characterized by including the pressing portion.

12. The gas vent path, The battery pack according to claim 1, characterized by including a plurality of unit gas vent paths that communicate one - to - one with the plurality of battery modules.

13. An automobile, characterized by including the battery pack according to any one of claims 1 to 12.

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