Battery pack and vehicle including the same

Abstract

A battery pack according to one aspect of the present invention includes a plurality of battery cells and a pack housing having an accommodation space for accommodating the plurality of battery cells. The pack housing includes a side frame that forms a side wall of the accommodation space, has a gas passage therein, and includes at least one window communicating with the gas passage on one surface adjacent to the accommodation space, and a base frame that forms a bottom of the accommodation space and includes at least one pocket configured to collect particles discharged from the battery cells accommodated in the accommodation space.

Description

Technical Field

[0001] This application claims priority based on Korean Patent Application No. 10-2023-0008989 filed on January 20, 2023, and all the contents disclosed in the specification and drawings of the said application are incorporated into this application.

[0002] The present invention relates to a battery pack and a vehicle including the same, and more particularly, to a battery pack including a plurality of rechargeable battery cells and a vehicle including such a battery pack.

Background Art

[0003] Generally, a secondary battery refers to a battery that can be repeatedly charged and discharged, such as a lithium-ion battery, a lithium polymer battery, a nickel-cadmium battery, a nickel-metal hydride battery, a nickel-zinc battery, etc. A battery cell corresponding to the most basic secondary battery can provide an output voltage of about 2.5V to 4.2V.

[0004] Recently, such battery cells have been applied to devices that require a high output voltage and a large charging capacity, such as electric vehicles and energy storage systems (ESS), and a battery module configured by connecting a plurality of battery cells in series, parallel, or a combination of series and parallel, and a battery pack configured by connecting such battery modules in series, parallel, or a combination of series and parallel again, are widely used.

[0005] However, as disclosed in Korean Patent Publication No. 10-2022-0052183, in the prior art, battery cells are housed in a box-shaped metal case to form a battery module, and these battery modules are again housed in a battery pack case to manufacture a battery pack. Therefore, there is a problem that the weight and volume of the entire battery pack increase, and the energy density of the battery pack decreases.

[0006] Also, in the prior art, in order to increase the energy density of the battery pack, a plurality of battery cells are arranged at a high density in the limited internal space of the battery pack. Therefore, when vent gas is generated in any one of the battery cells in the battery pack, it is difficult to discharge the vent gas in the intended direction, and heat energy and ignition sources such as dust and ash discharged from the battery cell accumulate in the battery pack, causing a problem of causing a chain thermal runaway or ignition of other battery cells.

Summary of the Invention

Problems to be Solved by the Invention

[0007] The technical problem to be solved by the present invention is to provide a battery pack and a vehicle including the same that can reduce weight and volume, have a high energy density, and prevent chain thermal runaway or ignition of the battery cells housed therein.

Means for Solving the Problems

[0008] A battery pack according to one aspect of the present invention includes a plurality of battery cells and a pack housing having an accommodation space for accommodating the plurality of battery cells. The pack housing forms a side wall of the accommodation space, has a gas passage inside, and includes a side frame having at least one window communicating with the gas passage on one surface adjacent to the accommodation space, and a base frame forming a bottom of the accommodation space, the base frame including at least one pocket configured to collect particles discharged from the battery cells accommodated in the accommodation space.

[0009] In one embodiment, each of the plurality of battery cells includes an electrode lead at an end facing the side frame, and the at least one window of the side frame may be provided at a position facing the electrode lead.

[0010] In one embodiment, the at least one pocket of the base frame may be provided below the at least one window.

[0011] In one embodiment, the side frame may further include a guide surface for guiding particles discharged from the battery cells to the pocket.

[0012] In one embodiment, the pack housing further includes a partition wall that divides the accommodation space into a plurality of sub-accommodation spaces independent of each other, and the side frame may include a plurality of windows corresponding to the plurality of sub-accommodation spaces.

[0013] In one embodiment, the base frame may include a plurality of pockets corresponding to the plurality of sub-accommodation spaces.

[0014] In one embodiment, the base frame may further include a cooling medium flow path through which a cooling medium moves.

[0015] In one embodiment, the side frame may be provided below the gas passage and further include a capture groove configured to capture particles that have flowed into the gas passage through the at least one window.

[0016] In one embodiment, the side frame may further include a plurality of capture fins that protrude from each other at a certain interval on the inner surface of the capture groove and are configured to capture particles that have flowed into the gas passage.

[0017] In one embodiment, the plurality of capture fins may protrude inclined with respect to the moving direction of the vent gas discharged from the battery cell and moving along the gas passage.

[0018] In one embodiment, the side frame may further include a gas discharge port that discharges the vent gas moving along the gas passage to the outside of the pack housing.

[0019] In one embodiment, the pack housing may further include a gas valve configured to open the gas discharge port when the internal pressure of the gas passage is higher than the external pressure of the battery pack and close the gas discharge port when the internal pressure of the gas passage is the same as or lower than the external pressure.

[0020] A vehicle according to another aspect of the present invention includes a battery pack according to any of the above embodiments.

Advantages of the Invention

[0021] According to the present invention, by directly accommodating a plurality of rechargeable battery cells in the pack housing of the battery pack, the weight and volume of the battery pack can be reduced, and the energy density can be improved.

[0022] In addition, by providing a window that communicates with the gas passage on one side of the side frame of the pack housing, which has a gas passage inside and is adjacent to the accommodation space in which the battery cells are accommodated, the gas generated from the battery cells accommodated in the accommodation space can be discharged in the intended direction. As a result, a chain reaction of thermal runaway and ignition of other battery cells can be prevented, and the safety of the battery pack can be improved.

[0023] Furthermore, by providing the base frame of the pack housing with pockets configured to collect particles such as dust and ash discharged from the battery cells accommodated in the accommodation space, blockage of the gas passage and occurrence of fire due to the particles can be prevented, and the safety of the battery pack can be further improved.

[0024] Furthermore, by providing a capture groove inside the side frame to capture the particles that have flowed into the gas passage, high-temperature particles can be blocked from being discharged outside the battery pack.

[0025] In addition to these, by providing the base frame with a cooling medium flow path through which the cooling medium moves and constituting the accommodation space, a heat sink provided separately inside the pack housing can be omitted, the structure of the battery pack can be simplified, and the manufacturing cost can be reduced.

[0026] Furthermore, it should be clearly understood from the following description that those having ordinary knowledge in the technical field to which the present invention pertains can solve various technical problems not mentioned above by various embodiments according to the present invention.

Brief Description of the Drawings

[0027]

Figure 1

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Figure 10

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Figure 12

Embodiments for Carrying Out the Invention

[0028] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to clarify the solution for solving the technical problems of the present invention. However, in describing the present invention, if it is recognized that the description of the known technology related to the present invention may rather obscure the gist of the present invention, the description thereof may be omitted. Also, the terms used in this specification are terms defined in consideration of the functions in the present invention, and these may possibly differ depending on the intention or convention of designers, manufacturers, etc. Therefore, it can be said that the definitions of the terms described later are appropriately defined based on the contents throughout this specification.

[0029] FIG. 1 shows a battery pack 10 according to an embodiment of the present invention in a perspective view.

[0030] As shown in FIG. 1, a battery pack 10 according to an embodiment of the present invention includes at least one rechargeable battery cell and a pack housing 200 that houses such a battery cell.

[0031] In this case, the pack housing 200 may have an accommodation space for accommodating a plurality of battery cells. For this purpose, the pack housing 200 may include a side frame 210 that constitutes a side wall of the accommodation space, a base frame 220 that constitutes a bottom of the accommodation space, and a lid 230 that covers an upper portion of the accommodation space.

[0032] As will be further described below, the side frame 210 may be provided with a gas passage inside thereof and may be provided with at least one window communicating with the gas passage on one surface adjacent to the accommodation space.

[0033] Further, the base frame 220 may be provided with at least one pocket configured to collect particles discharged from the battery cells housed in the accommodation space.

[0034] The lid 230 may be configured to cover an upper portion of the accommodation space and seal the accommodation space.

[0035] In one embodiment, a gas discharge port 218 for discharging vent gas generated from the battery cells housed in the pack housing 200 to the outside of the pack housing 200 may be provided on an outer surface of the pack housing 200. For example, the gas discharge port 218 may be provided on an outer surface of the side frame 210.

[0036] FIG. 2 shows an internal structure of the battery pack 10 shown in FIG. 1.

[0037] As shown in FIG. 2, the pack housing 200 of the battery pack 10 may have an accommodation space inside thereof, and may be configured to accommodate a plurality of battery cells 100 in this accommodation space.

[0038] The plurality of battery cells 100 may be stacked on one another in one direction (X-axis direction) to form a battery cell assembly CA.

[0039] The side frame 210 of the pack housing 200 may form around the side direction of the accommodation space, and may be configured to discharge vent gas generated from the battery cell 100 to the outside from the gas discharge port 218.

[0040] The base frame 220 of the pack housing 200 may form the bottom of the accommodation space, and may be configured to support the battery cells accommodated in the accommodation space.

[0041] The lid portion 230 of the pack housing 200 may be coupled and fixed to the side frame 210, and may be configured to cover the upper portion of the accommodation space and seal the accommodation space.

[0042] Further, the pack housing 200 may further include a partition wall W that divides the accommodation space into a plurality of sub-accommodation spaces S that are independent of one another. In this case, one or two or more battery cells 100 may be accommodated in each sub-accommodation space S.

[0043] Such a pack housing 200 may be made of a material having mechanical rigidity and heat resistance. For example, the pack housing 200 may be made of metal, a polymer synthetic resin, or a combination thereof.

[0044] Depending on the embodiment, the battery pack 10 may further include various electrical components (not shown) that control the charging and discharging operations of the battery cells housed inside the pack housing 200, monitor the state of charge (SOC), state of health (SOH), etc. These electrical components can be housed in the pack housing 200 together with the battery cells.

[0045] Figure 3 shows an exploded perspective view of the battery pack 10 shown in Figure 1.

[0046] As shown in Figure 3, each of the plurality of battery cells 100 housed in the battery pack 10 may include an electrode lead 110 at an end in the side direction (Y-axis direction) facing the side frame 210.

[0047] The side frame 210 may include a gas passage inside. Further, the side frame 210 may include at least one window 212 communicating with the gas passage on one surface adjacent to the accommodation space for housing the battery cells 100. In this case, each window 212 may be provided at a position facing the electrode lead 110 of the corresponding battery cell 100.

[0048] The base frame 220 may include at least one pocket 222 configured to collect particles discharged from the battery cells housed in the accommodation space. In this case, each pocket 222 may be provided below the corresponding window 212.

[0049] The partition wall W of the pack housing 200 may divide the accommodation space into a plurality of sub-accommodation spaces independent of each other. In this case, the side frame 210 may include a plurality of windows 212 corresponding to the plurality of sub-accommodation spaces. Further, the base frame 220 may include a plurality of pockets 222 corresponding to the plurality of sub-accommodation spaces.

[0050] In this way, the battery pack 10 can primarily block thermal propagation between battery cells by distributing and arranging a plurality of battery cells 100 in a plurality of sub-accommodation spaces that are independent of each other.

[0051] Also, the battery pack 10 discharges high-temperature vent gas through the window 212 provided for each sub-accommodation space, while collecting and isolating particles such as dust and ash (ash) corresponding to the ignition source by the pocket 222 provided for each sub-accommodation space, thereby secondarily blocking thermal propagation between battery cells.

[0052] FIG. 4 shows a battery cell 100 accommodated in a battery pack according to an embodiment of the present invention.

[0053] As shown in FIG. 4, the battery cell 100 is a basic rechargeable secondary battery and may include electrode leads 110 at both ends in the side direction (Y-axis direction) facing the side frame 210.

[0054] For example, the battery cell 100 may include a pouch-type secondary battery. In this case, the battery cell 100 can be manufactured by accommodating an electrode assembly in which a positive electrode terminal and a negative electrode terminal are laminated with a separator interposed therebetween and an electrolyte substance in a pouch-type case and sealing the case. The electrode lead 110 can be electrically connected to the electrode assembly.

[0055] When gas is generated inside such a battery cell 100, the gas may be discharged from a relatively vulnerable electrode lead portion among various parts of the battery cell 100. In this way, the gas discharged from the electrode lead portion flows into the gas passage through the window 212 of the side frame 210 described above, moves along the gas passage, and can be discharged to the outside of the pack housing 200 from the gas discharge port 218.

[0056] FIG. 5 shows the side frame 210 of the battery pack shown in FIG. 3.

[0057] As shown in FIG. 5, the side frame 210 may include a gas passage therein and may include a window 212 communicating with the gas passage on one surface adjacent to the battery cell 100. In this case, the window 212 may be provided at a position facing the electrode lead 110 of the battery cell 100.

[0058] As described above, the vent gas discharged from the electrode lead portion of the battery cell 100 may flow into the gas passage through the window 212 of the side frame 210, move along the gas passage, and be discharged to the outside of the pack housing 200 from the gas discharge port 218.

[0059] Further, the side frame 210 may further include a guide surface 210a configured to guide particles discharged from the battery cell 100 into pockets 222 of a base frame 220 provided below each window 212.

[0060] In this case, the side frame 210 may include a plurality of guide surfaces 210a corresponding to a plurality of pockets 222 provided in the base frame 220, respectively.

[0061] FIG. 6 shows the base frame 220 of the battery pack shown in FIG. 3.

[0062] As shown in FIG. 6, the base frame 220 may include pockets 222 configured to collect particles discharged from the battery cell 100. In this case, the base frame 220 may include a plurality of pockets 222 corresponding to a plurality of sub-accommodation spaces divided by a partition wall W of the pack housing 200.

[0063] As will be further described below, the base frame 220 may further include a coolant flow path through which a coolant moves inside. That is, the base frame 220 may be configured to serve both as a support structure for supporting the battery cells and as a heat sink for cooling the battery cells.

[0064] FIG. 7 shows a cross-sectional view taken along line A-A' of the battery pack shown in FIG. 1.

[0065] As shown in FIG. 7, each sub-accommodation space S independently divided from each other by the partition wall W may accommodate a battery cell assembly CA including a plurality of battery cells 100 stacked on each other.

[0066] Further, the pocket 222 of the base frame 220 provided at the bottom of each sub-accommodation space S may be formed in a concave shape in the direction of gravity (-Z axis direction). Such a pocket 222 can collect particles discharged from the battery cell 100 and falling due to their own weight.

[0067] In one embodiment, the pocket 222 may include an adhesive layer 222a on its inner surface. In this case, particles flowing into the pocket 222 may adhere to the adhesive layer 222a, and the movement of the particles may be blocked.

[0068] FIG. 8 shows a cross-sectional view taken along line B-B' of the battery pack shown in FIG. 1.

[0069] As shown in FIG. 8, the battery pack 10 may include the above-described window 212 and pocket 222 for each sub-accommodation space S. That is, the vent gas G discharged from around the electrode lead 110 of the battery cell 100 accommodated in each sub-accommodation space S may flow into the gas passage 214 inside the side frame 210 through the window 212 of the side frame 210 provided at a position facing the electrode lead 110.

[0070] In addition, the particles discharged together with the vent gas G from the battery cell 100 can fall by their own weight and be accommodated in the pocket 222 of the base frame 220. In this case, the guide surface 210a of the side frame 210 can guide the particles to the pocket 222.

[0071] In one embodiment, an adhesive layer 222a can be provided on the inner surface of the pocket 222. In this case, the particles flowing into the pocket 222 can adhere to and be fixed by the adhesive layer 222a.

[0072] As described above, the base frame 220 can include a cooling medium flow path 224 through which the cooling medium is moved. The cooling medium moving through such a cooling medium flow path 224 can absorb the heat generated from the battery cell 100 and discharge it to the outside.

[0073] In this way, since the base frame 220 of the pack housing 200 is configured to serve both as a support structure for supporting the battery cell and as a heat sink for cooling the battery cell, the structure of the battery pack can be simplified and the manufacturing cost can be reduced.

[0074] On the other hand, the side frame 210 can be provided below the gas passage 214 and include a capture groove 216 configured to capture the particles that have flowed into the gas passage 214 through the window 212. That is, the particles that are not accommodated in the pocket 222 of the base frame 220 due to the pressure of the vent gas G and have flowed into the gas passage 214 through the window 212 can fall while colliding with the inner surface of the gas passage 214 and be captured by the capture groove 216 provided below the gas passage 214.

[0075] In one embodiment, the side frame 210 can further include a plurality of capturing fins 216a that protrude from each other at a certain interval on the inner surface of the capture groove 216 and are configured to capture the particles that have flowed into the gas passage.

[0076] Further, in one embodiment, the side frame 210 may further include a partition wall 212a provided between adjacent windows inside the gas passage 214. Such a partition wall 212a can block the high-temperature vent gas G flowing into the gas passage 214 through the first window from flowing out through the second window adjacent to the first window immediately after colliding with the inner surface of the gas passage 214.

[0077] FIG. 9 shows a cross-sectional view taken along line C-C' of the battery pack shown in FIG. 1.

[0078] As shown in FIG. 9, the vent gas G flowing into the gas passage 214 of the side frame 210 through the window 212 can move through the gas passage 214 and be discharged to the outside of the pack housing 200 from the gas discharge port 218.

[0079] In this case, the partition wall 212a provided between adjacent windows can block the high-temperature vent gas G flowing into the gas passage 214 through the first window from flowing out through the second window adjacent to the first window immediately after colliding with the inner surface of the gas passage 214.

[0080] Also, due to the pressure of the vent gas G, the particles that are not accommodated in the pocket 222 of the base frame 220 and flow into the gas passage 214 through the window 212 can fall while colliding with the inner surface of the gas passage 214 and be captured by the capture groove 216 provided below the gas passage 214.

[0081] In one embodiment, the side frame 210 may further include a plurality of capturing fins 216a that protrude from each other at a certain interval on the inner surface of the capture groove 216 and are configured to capture the particles flowing into the gas passage. That is, the particles flowing into the gas passage 214 can fall into the capture groove 216 by their own weight and be captured by being inserted between the capture fins.

[0082] In this case, the plurality of capture fins 216a may be configured to protrude inclined with respect to the moving direction of the vent gas G discharged from the battery cell and moving along the gas passage 214. As a result, the plurality of capture fins 216a can suppress the generation of vortex inside the gas passage 214 by capturing the particles falling from the gas passage 214 and smoothing the flow of the vent gas G.

[0083] Such capture fins 216a may be made of a thermally conductive material. The capture fins 216a made of a thermally conductive material can also serve as cooling fins for cooling the vent gas G.

[0084] FIG. 10 shows the gas discharge portion of the battery pack 10A according to a modified embodiment of the present invention.

[0085] As shown in FIG. 10, the battery pack 10A according to a modified embodiment of the present invention may include a configuration corresponding to the configuration of the battery pack 10 described above.

[0086] That is, the pack housing of the battery pack 10A may include the side frame 210, the base frame 220, and the lid portion 230 described above, and in particular, may further include a gas valve 240 for opening and closing the gas discharge port 218.

[0087] The gas valve 240 may be configured to open the gas discharge port 218 when the internal pressure of the gas passage provided inside the side frame 210 is higher than the external pressure of the battery pack 10A, and to close the gas discharge port 218 when the internal pressure of the gas passage is the same as or lower than the external pressure.

[0088] For this purpose, the gas valve 240 may include a swing door 242 configured to swing upward or downward to open and close the gas discharge port 218, and a stopper 244 for restricting the swing angle of such a swing door 242.

[0089] For example, the swing door 242 can be supported by a hinge and configured to be rotatable in the vertical direction. In this case, when the internal pressure of the gas passage is the same as or lower than the external pressure, the swing door 242 can be in close contact with the gas discharge port 218 and close the gas discharge port 218 due to the self-weight of the swing door 242 or the pressure difference between the inside and outside of the gas discharge port 218.

[0090] On the other hand, when the internal pressure of the gas passage is higher than the external pressure, the swing door 242 can swing upward due to the air or gas discharged from the gas discharge port 218, and as a result, the gas discharge port 218 can be opened.

[0091] FIG. 11 shows the gas discharge state of the battery pack 10A shown in FIG. 10.

[0092] As shown in FIG. 11, when high-pressure and high-temperature vent gas is generated in the battery cells housed in the battery pack 10A and the internal pressure of the gas passage becomes higher than the external pressure of the battery pack 10A, the swing door 242 swings upward due to the air or gas discharged from the gas discharge port 218, the gas discharge port 218 is opened, and the vent gas G can be discharged from the opened gas discharge port 218.

[0093] In this case, the stopper 244 can limit the swing angle of the swing door 242 and control the vent gas G so as not to go upward.

[0094] Also, immediately after the discharge of the vent gas G is completed, when the internal pressure of the gas passage becomes lower than the external pressure of the battery pack 10A, the swing door 242 swings downward to close the gas discharge port 218, thereby preventing a rapid inflow of oxygen into the battery pack 10A. As a result, ignition and explosion of the battery pack 10A can be suppressed.

[0095] FIG. 12 shows a vehicle 2 according to an embodiment of the present invention.

[0096] As shown in FIG. 12, the vehicle 2 according to an embodiment of the present invention may include one or more of the battery packs 10, 10A according to the various embodiments described above. In this case, the battery packs 10, 10A can provide the electrical energy required for various operations of the vehicle 2.

[0097] For reference, the battery packs 10, 10A according to the present invention can be applied not only to vehicles but also to various electrical devices and electrical systems, and can also be applied to an energy storage system (ESS).

[0098] As described above, according to the present invention, by directly accommodating a plurality of charge-dischargeable battery cells in the pack housing of the battery pack, the weight and volume of the battery pack can be reduced, and the energy density can be improved.

[0099] In addition, since the side frame of the pack housing has a gas passage inside and a window communicating with the gas passage on one side adjacent to the accommodation space in which the battery cells are accommodated, the gas generated from the battery cells accommodated in the accommodation space can be discharged in the intended direction. As a result, a chain thermal runaway or ignition of other battery cells can be prevented, and the safety of the battery pack can be improved.

[0100] Furthermore, since the base frame of the pack housing is provided with pockets configured to collect particles such as dust and ash discharged from the battery cells accommodated in the accommodation space, blockage of the gas passage and occurrence of a fire due to the particles can be prevented, and the safety of the battery pack can be further improved.

[0101] Furthermore, by providing a capture groove inside the side frame for capturing the particles that have flowed into the gas passage, it is possible to block the discharge of high-temperature particles to the outside of the battery pack.

[0102] In addition to these, since the base frame includes a cooling medium flow path through which the cooling medium moves and constitutes the accommodation space, it is possible to omit a heat sink separately provided inside the pack housing, simplify the structure of the battery pack, and reduce the manufacturing cost.

[0103] Furthermore, it goes without saying that the embodiments according to the present invention can solve various other technical problems in the technical fields related to the present invention in addition to the technical fields mentioned in this specification.

[0104] So far, the present invention has been described with reference to specific embodiments. However, those skilled in the art will clearly understand that various modified embodiments can be realized within the technical scope of the present invention. Therefore, the embodiments disclosed above should be considered from an explanatory perspective rather than a limiting perspective. That is, the true technical idea scope of the present invention is shown in the claims, and any differences within the equivalent scope thereof should be construed as being included in the present invention.

Explanation of Reference Numerals

[0105] 2 Vehicle 10, 10A Battery Pack 100 Battery Cell 110 Electrode Lead 200 Pack Housing 210 Side Frame 210a Guide Surface 212 Window 212a Partition Wall 214 Gas Passage 216 Capture Groove 216a Capture Fin 218 Gas outlet 220 Base frame 222 Pocket 222a Adhesive layer 224 Cooling medium flow path 230 Lid part 240 Gas valve 242 Swing door 244 Stopper S Sub-accommodation space W Partition wall

Claims

1. A plurality of battery cells, A pack housing having an accommodation space for accommodating the plurality of battery cells, A battery pack including: The pack housing includes: A side frame that forms a side wall of the accommodation space, has a gas passage inside, and has at least one window communicating with the gas passage on one surface adjacent to the accommodation space; A base frame that constitutes a bottom portion of the accommodation space, the base frame including at least one pocket configured to collect particles discharged from the battery cells accommodated in the accommodation space. A battery pack.

2. Each of the plurality of battery cells is provided with an electrode lead at an end facing the side frame, The battery pack according to claim 1, wherein the at least one window of the side frame is provided at a position facing the electrode lead.

3. The battery pack according to claim 1, wherein the at least one pocket of the base frame is provided below the at least one window.

4. The battery pack according to claim 3, wherein the side frame further includes a guide surface for guiding particles discharged from the battery cells to the pocket.

5. The pack housing further includes a partition wall that divides the accommodation space into a plurality of sub-accommodation spaces independent of each other, The battery pack according to claim 1, wherein the side frame includes a plurality of windows corresponding to the plurality of sub-accommodation spaces.

6. The battery pack according to claim 5, wherein the base frame includes a plurality of pockets corresponding to the plurality of sub-accommodation spaces.

7. The battery pack according to claim 1, wherein the base frame further includes a cooling medium flow path through which a cooling medium moves.

8. The side frame, The battery pack according to claim 1, further comprising a capture groove provided below the gas passage and configured to capture particles that have flowed into the gas passage through the at least one window.

9. The side frame, The battery pack according to claim 8, further comprising a plurality of capture fins that protrude from each other at a constant interval on an inner surface of the capture groove and are configured to capture particles that have flowed into the gas passage.

10. The plurality of capture fins, The battery pack according to claim 9, wherein the vent gas discharged from the battery cell and moving along the gas passage protrudes obliquely with respect to the moving direction of the vent gas.

11. The side frame The battery pack according to claim 1, further comprising a gas discharge port for discharging vent gas moving along the gas passage to the outside of the pack housing.

12. The pack housing The battery pack according to claim 11, further including a gas valve configured to open the gas discharge port when the internal pressure of the gas passage is higher than the external pressure of the battery pack and to close the gas discharge port when the internal pressure of the gas passage is the same as or lower than the external pressure.

13. A vehicle comprising the battery pack according to any one of claims 1 to 12.

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