Battery pack and vehicle including same

Abstract

The purpose of the present invention is to secure a free volume by forming a through hole in a part of a pack case and inserting an insertion member into the pack case. The present invention comprises a partition wall frame interposed between battery modules, the partition wall frame comprising: first and second frames each having a through hole; and an insertion member interposed between the first and second frames, wherein the insertion member is made of a material that melts at a predetermined temperature, and if a specific battery module ignites, the flame is blocked for a predetermined time at the beginning of the fire in the specific battery module so as to prevent the movement of the flame to a neighboring battery module, and then the insertion member is melted after the time lapses so that gas or the flame is sufficiently vented to the neighboring battery module.

Description

Battery pack and vehicle including same

[0001] This application claims priority to Korean Patent Application No. 10-2023-0101524, filed on August 3, 2023, and all contents disclosed in the specification and drawings of the said application are incorporated herein by reference.

[0002] The present invention relates to a battery pack and a vehicle including the same, and more particularly, to a battery pack capable of preventing pressure increase inside the battery pack and a vehicle including the same.

[0003] As technological development and demand for mobile devices increase, the demand for secondary batteries as an energy source is rapidly increasing. Nickel-cadmium batteries or hydrogen-ion batteries were used as secondary batteries in the past, but recently, lithium secondary batteries are widely used because they have almost no memory effect compared to nickel-based secondary batteries, are free to charge and discharge, have a very low self-discharge rate, and have a high energy density.

[0004] These lithium secondary batteries primarily use lithium oxide and carbon materials as the positive and negative electrode active materials, respectively. Lithium secondary batteries comprise an electrode assembly comprising positive and negative plates coated with the positive and negative electrode active materials, respectively, with a separator interposed between them, and an outer case, i.e., a battery case, that seals and encloses the electrode assembly together with an electrolyte.

[0005] Lithium secondary batteries are composed of a positive electrode, a negative electrode, and a separator and electrolyte interposed between them. Depending on the type of positive and negative electrode active materials used, they are divided into lithium ion batteries (LIBs) and lithium polymer batteries (PLIBs). Typically, the electrodes of these lithium secondary batteries can be formed by applying a positive or negative electrode active material to a current collector such as an aluminum or copper sheet, mesh, film, or foil, and then drying it.

[0006] Lithium secondary batteries are currently in the spotlight due to their advantages such as high operating voltage and significantly higher energy density. However, because they use organic electrolytes, there is a problem that lithium secondary batteries can cause overcurrent and overheating when overcharged, which in severe cases can cause fire due to explosion or ignition.

[0007] Various types of secondary batteries include battery modules in which a plurality of battery cells are stacked and inserted into a case that is provided to protect the battery cells, and battery packs in which a plurality of battery modules are housed.

[0008] If a thermal event occurs in a battery cell within a battery module, thermal energy may be trapped between the battery modules, causing a rapid increase in internal pressure and an explosion of the battery module, potentially spreading flames to neighboring battery modules and resulting in a chain reaction.

[0009] For example, if there is insufficient free volume (a kind of buffer space through which flames or gases can move) between adjacent battery modules arranged inside a battery pack, there is a problem in that flames or gases cannot move, which increases internal pressure and increases the risk of explosion.

[0010] Accordingly, the technical problem to be achieved by the present invention is to provide a battery pack and a vehicle including the same that can prevent a rapid increase in pressure inside the battery pack by securing a free volume between battery modules when a thermal event occurs.

[0011] However, the technical problems to be solved by the present invention are not limited to the problems described above, and other problems not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[0012] According to one aspect of the present invention, a battery pack may be provided, comprising: a plurality of battery modules in which a plurality of battery cells are stacked; a pack case in which the plurality of battery modules are accommodated and in which at least a portion of the pack case has a through hole formed; and an insert member inserted into the pack case.

[0013] In one embodiment, at least a portion of the pack case comprises a first frame; and a second frame arranged parallel to the first frame at a preset interval, and is configured as a double frame structure, wherein the insertion member can be inserted into the interval between the first frame and the second frame.

[0014] In one embodiment, each of the first frame and the second frame can be manufactured as a truss structure in which the through hole is formed.

[0015] In one embodiment, the truss structure may include a frame portion forming a frame; and a connecting portion connecting the frame portion so that the through hole is formed.

[0016] In one embodiment, the insert member may be made of a material that melts at a preset temperature.

[0017] In one embodiment, the insert member may be formed of a silicone pad.

[0018] In one embodiment, the insert member may be formed of a mica pad.

[0019] In one embodiment, the insert member may be a fire extinguishing agent pad provided with a fire extinguishing agent.

[0020] In one embodiment, the digestive agent may comprise Novec.

[0021] In one embodiment, the battery module may include an exhaust path member that covers at least a portion of the battery module and is spaced apart from the battery module, and provides an exhaust path for flame or gas.

[0022] In one embodiment, the discharge path member is provided in plurality, and the plurality of discharge path members are spaced apart at a preset interval to cover the battery module.

[0023] In one embodiment, the pack case includes a lower frame on which the plurality of battery modules are mounted; a side frame extending upward from an edge of the lower frame; an inner frame extending upward inside the lower frame and coupled to the side frame; a bulkhead frame coupled to the inner frame and interposed between the plurality of battery modules; and an upper frame coupled to the side frame, wherein a plurality of the discharge path members can be coupled to the side frame and the bulkhead frame.

[0024] In one embodiment, the flame or the gas may be configured to move upward through the gap between the plurality of exhaust path members.

[0025] In one embodiment, a space is formed between the upper frame and the discharge path member, and the flame or the gas can be discharged in a preset direction through the space.

[0026] Meanwhile, according to another aspect of the present invention, a vehicle including the above-described battery pack can be provided.

[0027] Embodiments of the present invention have the effect of preventing a rapid increase in pressure inside a battery pack by securing a free volume between battery modules when a thermal event occurs.

[0028] Additionally, it has the effect of ensuring the stability of the battery module.

[0029] However, the effects that can be obtained through the present invention are not limited to the effects described above, and other technical effects not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[0030] FIG. 1 is an exploded perspective view of a battery pack according to a first embodiment of the present invention.

[0031] FIG. 2 is a cross-sectional view of a battery module included in the battery pack of FIG. 1.

[0032] Figure 3 is an enlarged view of part A of Figure 1.

[0033] FIG. 4 is a perspective view and a partially enlarged view of an insert member in a battery pack according to the first embodiment of the present invention.

[0034] Figure 5 is a plan view of Figure 4 with some parts omitted.

[0035] FIG. 6 is a perspective view of a battery pack according to the first embodiment of the present invention with an insert member removed from the pack case.

[0036] Figure 7 is a plan view of Figure 6 with some parts omitted.

[0037] Figure 8 is a perspective view of a battery pack according to a second embodiment of the present invention.

[0038] Figure 9 is an enlarged view of part B of Figure 8.

[0039] Fig. 10 is a cross-sectional view taken along line C-C' of Fig. 8, with some parts omitted.

[0040] FIG. 11 is a drawing for explaining a vehicle including a battery pack according to each embodiment of the present invention.

[0041] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Terms or words used in this specification and claims should not be interpreted as limited to their conventional or dictionary meanings, but should be interpreted with meanings and concepts that conform to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concept of the term to best explain his or her own invention. Therefore, it should be understood that the embodiments described in this specification and the configurations illustrated in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical idea of ​​the present invention, and various equivalents and modifications may exist as of the time of this application.

[0042] In the drawings, the sizes of each component or specific parts of that component are exaggerated, omitted, or schematically illustrated for convenience and clarity of explanation. Therefore, the size of each component does not entirely reflect its actual size. If a detailed description of a related known function or configuration is deemed to unnecessarily obscure the gist of the present invention, such description will be omitted.

[0043] The term 'joint' or 'connection' as used herein includes not only cases where one member is directly joined or directly connected to another member, but also cases where one member is indirectly joined or indirectly connected to another member through a connecting member.

[0044] FIG. 1 is an exploded perspective view of a battery pack according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of a battery module included in the battery pack of FIG. 1, FIG. 3 is an enlarged view of portion A of FIG. 1, FIG. 4 is a perspective view and a partially enlarged view of an insertion member in a battery pack according to the first embodiment of the present invention, FIG. 5 is a plan view of FIG. 4 with a portion omitted, FIG. 6 is a perspective view of a battery pack according to the first embodiment of the present invention with an insertion member removed from a pack case, and FIG. 7 is a plan view of FIG. 6 with a portion omitted.

[0045] Referring to FIG. 1, a battery pack (10) according to the first embodiment of the present invention may be configured to include a plurality of battery modules (100), a pack case (200), and an insert member (300).

[0046] A plurality of battery modules (100) are provided and arranged in various ways. For example, as shown in FIG. 1, they may be arranged in horizontal and vertical directions, but are not limited thereto.

[0047] Referring to FIG. 2, a battery module (100) may have a plurality of battery cells (110) and a module case (120).

[0048] A plurality of battery cells (110) can be stacked on top of each other. The battery cells (110) can have various structures, and furthermore, the plurality of battery cells (110) can be stacked in various ways.

[0049] The battery cell (110) may have a structure in which a plurality of unit cells arranged in the order of positive plate-separator-negative plate or bi-cells arranged in the order of positive plate-separator-negative plate-separator-positive plate-separator-negative plate are stacked according to the battery capacity.

[0050] The battery cell (110) may be equipped with an electrode lead. The electrode lead is a type of terminal that is exposed to the outside and connected to an external device, and may be made of a conductive material. The electrode lead may include a positive electrode lead and a negative electrode lead.

[0051] The positive electrode lead and the negative electrode lead may be positioned in opposite directions with respect to the longitudinal direction of the battery cell (110), or the positive electrode lead and the negative electrode lead may be positioned in the same direction with respect to the longitudinal direction of the battery cell (110).

[0052] A battery cell (110) may be provided with a plurality of cartridges (not shown) for storing the battery cell (110). Each cartridge (not shown) may be manufactured by injection molding plastic, and a plurality of cartridges (not shown) having a storage portion capable of storing the battery cell (110) may be stacked. A cartridge assembly in which a plurality of cartridges (not shown) are stacked may be provided with a connector element or a terminal element.

[0053] The connector element may include various types of electrical connection components or connecting members for connection to, for example, a BMS (Battery Management System, not shown) that can provide data on the voltage or temperature of the battery cell (110).

[0054] In addition, the terminal element is a main terminal connected to the battery cell (110) and includes a positive terminal and a negative terminal. The terminal element is provided with a terminal bolt so that it can be electrically connected to the outside. Meanwhile, the battery cell (110) may have various shapes.

[0055] Referring to FIG. 2, a plurality of battery cells (110) are stacked and stored in a module case (120). The module case (120) surrounds the plurality of battery cells (110), thereby protecting the battery cells (110) from external vibrations or shocks.

[0056] The module case (120) may be formed in a shape corresponding to the shape of a stacked body in which a plurality of battery cells (110) are stacked. For example, if the stacked body in which a plurality of battery cells (110) are stacked is formed in a hexahedral shape, the module case (120) may also be formed in a hexahedral shape corresponding thereto. However, the present invention is not limited thereto. Here, the module case (120) may include an upper module case, a lower module case, and a side module case.

[0057] In addition, the module case (120) can be manufactured by, for example, bending a metal plate, whereby the module case (120) can be manufactured as an integral part. When the module case (120) is manufactured as an integral part, the joining process is simplified and simplified. Alternatively, the module case (120) can be provided in a detachable form and joined by welding or the like. However, the material of the module case (120) is not limited to a metal material.

[0058] Referring to FIGS. 1 and 3, a plurality of battery modules (100) are stored in a pack case (200). And, referring to FIG. 6, a through hole (244, 245) is formed in at least a portion of a bulkhead frame (240) provided in the pack case (200), for example, in the pack case (200).

[0059] The pack case (200) may be configured to include, for example, a lower frame (210), a side frame (220), an inner frame (230), a bulkhead frame (240), and an upper frame (250). Here, a through hole (244, 245) may be formed in at least one of the side frame (220), the inner frame (230), and the bulkhead frame (240).

[0060] The lower frame (210) is configured to accommodate a plurality of battery modules (100). The lower frame (210) may be formed in a square plate shape, but is not limited thereto. The lower frame (210) forms the bottom of the pack case (200).

[0061] The side frame (220) may be configured to extend upward from the edge of the lower frame (210). The side frame (220) defines the height of the pack case (200) and forms a preset space (600) between the side frame (220) and the lower frame (210). In addition, a plurality of battery modules (100) are mounted in the space (600) between the side frame (220) and the lower frame (210). The side frame (220) may include a long side frame having a relatively long length and a short side frame having a relatively short length. Alternatively, the lengths of the side frames (220) may all be the same.

[0062] The inner frame (230) extends upward from within the lower frame (210) and is coupled to the side frame (220) and the bulkhead frame (240). One or more inner frames (230) may be provided, and a plurality of battery modules (100) may be arranged to face each other based on the inner frame (230).

[0063] The bulkhead frame (240) is connected to the inner frame (230). In addition, the bulkhead frame (240) is interposed between a plurality of battery modules (100). In FIG. 1, one bulkhead frame (240) is positioned between two adjacent battery modules (100), but this is not limited thereto. In addition, the bulkhead frame (240) is also positioned at the end of the battery module (100).

[0064] The upper frame (250) is connected to the side frame (220). As will be described in detail later, a space (600) through which flame or gas can be discharged can be formed between the upper frame (250) and the discharge path member (400) (see FIG. 10).

[0065] At least a portion of the pack case (200) may be configured as a double frame structure including a first frame (241) and a second frame (242). Referring to FIG. 1, although the bulkhead frame (240) is configured as a double frame structure, the side frame (220) and the inner frame (230) may also be configured as a double frame structure. For convenience of explanation, the following description will focus on a case where the bulkhead frame (240) is configured as a double frame structure of the first frame (241) and the second frame (242).

[0066] Referring to FIGS. 1 and 4 together, the first frame (241) of the bulkhead frame (240) is positioned close to the battery module (100). Referring to FIG. 6 , a first through hole (244) is formed in the first frame (241). The first frame (241) may be made of a metal material, but the material is not limited thereto. Furthermore, the first frame (241) may have a square plate shape, but the shape is not limited thereto.

[0067] The second frame (242) of the bulkhead frame (240) is arranged parallel to the first frame (241) at a preset interval (243, see FIG. 7). Referring to FIG. 6, a second through hole (245) is formed in the second frame (242). Furthermore, the second frame (242) may be made of the same material as the first frame (241), for example, may be made of a metal material, but the material is not limited thereto. Furthermore, the second frame (242) may be formed in the same shape as the first frame (241), for example, may be a square plate shape, but the shape is not limited thereto.

[0068] And, referring to FIGS. 5 and 7, an insertion member (300) is inserted into the gap (243) between the first frame (241) and the second frame (242). The insertion member (300) will be described later.

[0069] Referring to FIG. 6, each of the first frame (241) and the second frame (242) may be manufactured as a truss structure in which through holes (244, 245) are formed. The truss structure may vary. For example, referring to FIGS. 4 and 6, the truss structure may be configured to include a frame portion (246) and a connecting portion (247).

[0070] The frame portion (246) is configured to form a frame of a frame (first frame (241) or second frame (242)). The connecting portion (247) connects the frame portions (246) so that through holes (244, 245) are formed. Referring to Fig. 6, the first frame (241) and the second frame (242) are provided with a truss structure by a plurality of right-angled triangle-shaped through holes (244, 245), but the shape of the through holes (244, 245) is not limited thereto and may vary.

[0071] In this way, the rigidity of the pack case (200) can be secured by the frame having a truss structure.

[0072] Referring to FIGS. 1, 4, and 5, the insertion member (300) can be inserted into the inside of the pack case (200), for example, into the inside of the bulkhead frame (240) of the pack case (200). The insertion member (300) can be made of a material that melts at a preset temperature.

[0073] As described above, when a thermal event occurs in a battery cell (110) inside a battery module (100), thermal energy may be trapped between the battery modules (100), causing the internal pressure to rapidly increase.

[0074] As shown in Fig. 1, if the space between one bulkhead frame (240) and an adjacent bulkhead frame (240) is narrow and there is insufficient free volume to act as a buffer space, when a thermal event occurs, flames or gas cannot move to the free volume, and as a result, the internal pressure increases, which may cause the battery pack (10) to explode.

[0075] To prevent this, the battery pack (10) according to the first embodiment of the present invention has a structure in which through holes (244, 245) are formed in each of the first frame (241) and the second frame (242) as described above, and an insertion member (300) is inserted between the first frame (241) and the second frame (242).

[0076] Here, the insert member (300) can be manufactured from a material that melts at a preset temperature, as described above. When a thermal event occurs in the battery cell (110), causing the temperature to rise due to a flame or the like, the insert member (300) melts at the preset temperature. Furthermore, when the insert member (300) melts, flames or gas can move outward through the through-holes (first through-hole (244) and second through-hole (245)) of the first frame (241) and the second frame (242).

[0077] In this way, as the insert member (300) melts, it communicates with the neighboring space through the through holes (244, 245) of the first frame (241) and the second frame (242), thereby increasing the free volume through which flame or gas can move, and ultimately preventing the pressure inside the battery pack (10) from increasing.

[0078] If a flame or the like moves laterally immediately after a thermal event occurs inside the battery pack (10), it may have a negative impact on neighboring batteries. Therefore, in the early stages of a thermal event, the insert (300) blocks the movement of the flame. In addition, when the insert (300) melts over time, the flame or gas has been sufficiently vented (e.g., upper venting). Therefore, it is more advantageous for the insert (300) to be removed by the high temperature, thereby securing a free volume.

[0079] That is, when a flame initially occurs in any battery module (100) inside the battery pack (10), the flame can be prevented from moving to the neighboring battery module (100) by the insert member (300). Then, as time passes and the flame or gas is vented, the insert member (300) melts due to the high temperature, securing a free volume, thereby preventing an increase in pressure inside the battery pack (10).

[0080] Here, the melting temperature of the insert member (300) may vary depending on the configuration of the battery pack (10). That is, for example, the melting temperature of the insert member (300) may vary depending on the specifications or model of the battery pack (10), and the specific melting temperature may be determined through experiments, etc.

[0081] For this purpose, the insertion member (300) can be manufactured from various materials. For example, the insertion member (300) can be manufactured from a silicone pad. Alternatively, in another embodiment, the insertion member (300) can be manufactured from a mica pad. The silicone pad and the mica pad can be selected depending on the ignition temperature or flame temperature of the battery cells (110) stacked inside the battery module (100). Here, mica is a fire-resistant material that melts at a higher temperature than the silicone pad, so the mica pad can be used as the insertion member (300) in specifications or models in which a high-temperature flame is generated.

[0082] In a modified embodiment, the insert member (300) may be a fire extinguishing agent pad equipped with a fire extinguishing agent. For example, the interior of the insert member (300) may be filled with the fire extinguishing agent. Here, when the insert member (300) melts due to a flame through the through-holes (244, 245) of the frame (241, 242), the fire extinguishing agent inside the insert member (300) flows out, thereby eliminating the flame. In addition, when the insert member (300) melts, it is possible to secure a free volume, thereby having the effect of reducing the pressure inside the battery pack (10).

[0083] Here, the digestive agent may be various and may include, but is not limited to, Novec.

[0084] FIG. 8 is a perspective view of a battery pack (10) according to a second embodiment of the present invention, FIG. 9 is an enlarged view of part B of FIG. 8, and FIG. 10 is a cross-sectional view taken along line C-C' of FIG. 8, with some parts omitted.

[0085] Referring to Fig. 8, the second embodiment of the present invention differs structurally from the first embodiment in that it includes a discharge path member (400). However, any portions common to those described in the first embodiment are replaced with the description of the first embodiment described above. Furthermore, any portions described in the second embodiment that are applicable to the first embodiment may also be applied to the first embodiment.

[0086] Referring to FIG. 8, the exhaust path member (400) is spaced apart from the battery module (100) and covers at least a portion of the battery module (100), and provides a path for exhausting flames or gases. The exhaust path member (400) may be various. For example, as shown in FIG. 8, a plurality of exhaust path members (400) may be provided, and the plurality of exhaust path members (400a, 400b, 400c) may be spaced apart from each other at a preset interval (500).

[0087] And, referring to FIGS. 8 and 9, a plurality of discharge path members (400a, 400b, 400c) are arranged spaced apart from each other to cover the battery modules (100). In FIG. 8, three discharge path members (400a, 400b, 400c) cover the battery modules (100), but the number of discharge path members (400) is not limited thereto and may vary.

[0088] As described in the first embodiment, the pack case (200) may be configured to include, for example, a lower frame (210), a side frame (220), an inner frame (230), a bulkhead frame (240), and an upper frame (250). A detailed description thereof is replaced by the description described above.

[0089] In addition, a plurality of exhaust path members (400a, 400b, 400c) can be coupled to the side frame (220) and the bulkhead frame (240). At this time, as shown in FIG. 10, a space (600) can be formed between the upper frame (250) and each of the plurality of exhaust path members (400a, 400b, 400c).

[0090] For example, if a thermal event occurs in a battery cell (110) within a battery module (100), flames or gases may move upward through a gap (500) between a plurality of exhaust path members (400a, 400b 400c) (e.g., between two adjacent exhaust path members (400a, 400b) that are arranged close to each other).

[0091] And, flame or gas that has moved upward through the gap (500) between the plurality of discharge path members (400a, 400b 400c) can be discharged in a preset direction through the space (600) between the upper frame (250) and the discharge path member (400). Here, the space (600) between the upper frame (250) and the discharge path member (400) can provide a passage for the flame or gas to move.

[0092] In this way, when flame or gas moves through the space (600) between the upper frame (250) and the exhaust path member (400), it is possible to prevent the flame or gas from flowing back into the battery module (100) where a thermal event has occurred.

[0093] For example, if only the upper frame (250) is provided without the exhaust path member (400), the flame or gas generated during a thermal event may move upward, hit the upper frame (250), and then be reflected, thereby causing the flame or gas to flow back into the battery module (100) where the thermal event occurred. In this way, if the flame or gas flows back into the battery module (100), the ignition speed of the module is accelerated, thereby increasing the risk of explosion.

[0094] However, in the case of the battery pack (10) according to the second embodiment of the present invention, since the discharge path member (400) is provided on the lower side of the upper frame (250), even if flame or gas collides with the upper frame (250) and is reflected, it is blocked by the discharge path member (400), thereby preventing it from flowing back into the battery module (100). In addition, there is an effect of reducing the risk of explosion of the battery module (100) in which a thermal event has occurred.

[0095] FIG. 11 is a drawing for explaining an automobile including a battery pack (10) according to each embodiment of the present invention.

[0096] Referring to FIG. 11, a vehicle (20) according to one embodiment of the present invention may include one or more battery packs (10) according to each of the embodiments described above. Here, the vehicle (20) includes various types of vehicles that are designed to use electricity, such as electric vehicles or hybrid vehicles.

[0097] In this specification, when terms indicating directions such as up, down, left, and right are used, these terms are only for convenience of explanation, and it is obvious to those skilled in the art that these terms may vary depending on the location of the target object or the location of the observer.

[0098] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and those skilled in the art to which the present invention pertains may make various modifications and variations within the scope of the technical spirit of the present invention and the equivalent scope of the claims to be described below. Therefore, the embodiments disclosed above should be considered in an illustrative rather than a restrictive sense. In other words, the true scope of the technical spirit of the present invention is set forth in the claims, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

[0099] The present invention relates to a battery pack and an automobile including the same, and is particularly applicable to industries related to secondary batteries.

Claims

1. Multiple battery modules in which multiple battery cells are stacked; A pack case in which the plurality of battery modules are stored and at least some of the battery modules have through holes formed therein; and A battery pack including an insert member inserted inside the pack case.

2. In paragraph 1, At least a portion of the above pack case, first frame; and It comprises a second frame arranged in parallel and spaced apart from the first frame at a preset interval, and is configured as a double frame structure. A battery pack characterized in that the insert member is inserted into the gap between the first frame and the second frame.

3. In paragraph 2, A battery pack characterized in that each of the first frame and the second frame is manufactured as a truss structure in which the through hole is formed.

4. In paragraph 3, The above truss structure, a border portion forming a border; and A battery pack characterized by including a connecting portion connecting the edge portion so that the through hole is formed.

5. In paragraph 3, A battery pack characterized in that the above insert member is made of a material that melts at a preset temperature.

6. In paragraph 5, A battery pack characterized in that the above insert member is made of a silicone pad.

7. In paragraph 1, A battery pack characterized in that the above insert member is made of a mica pad.

8. In paragraph 1, A battery pack characterized in that the above insert member is a fire extinguishing agent pad equipped with a fire extinguishing agent.

9. In paragraph 8, A battery pack characterized in that the above digestive material comprises Novec.

10. In paragraph 1, A battery pack characterized by including an exhaust path member spaced apart from the battery module and covering at least a portion of the battery module, and providing a path for exhausting flame or gas.

11. In paragraph 10, A battery pack characterized in that a plurality of the above discharge path members are provided, and the plurality of the above discharge path members are spaced apart at a preset interval and cover the battery module.

12. In paragraph 11, The above pack case is, A lower frame on which the plurality of battery modules are mounted; A side frame extending upward from the edge of the lower frame; An inner frame extending upwardly within the lower frame and coupled to the side frame; A bulkhead frame coupled to the inner frame and interposed between the plurality of battery modules; and Includes an upper frame coupled to the above side frame, A battery pack characterized in that a plurality of the above discharge path members are coupled to the side frame and the bulkhead frame.

13. In paragraph 12, A battery pack characterized in that the flame or the gas is configured to move upward through the gap between the plurality of discharge path members.

14. In paragraph 13, A battery pack characterized in that a space is formed between the upper frame and the discharge path member, and the flame or the gas is discharged in a preset direction through the space.

15. A vehicle comprising a battery pack according to any one of paragraphs 1 to 14.

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