Battery packs and automobiles containing them

Abstract

A battery pack and an automobile including the same are disclosed. A battery pack according to one embodiment of the present invention includes a plurality of battery modules in which a plurality of battery cells are stacked, and a pack case in which the plurality of battery modules are housed, characterized in that an insertion member is provided inside the pack case.

Description

Technical Field

[0001] This application claims priority based on Korean Patent Application No. 10-2023-0101524 filed on August 3, 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 an automobile including the same, and more particularly, to a battery pack capable of preventing an increase in internal pressure of the battery pack and an automobile including the same.

Background Art

[0003] As the technology 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 have been used as conventional secondary batteries, but recently, lithium secondary batteries, which have almost no memory effect compared to nickel-based secondary batteries, are freely chargeable and dischargeable, have a very low self-discharge rate, and have a high energy density, are widely used.

[0004] Such lithium secondary batteries mainly use lithium-based oxides and carbon materials as the positive electrode active material and the negative electrode active material, respectively. A lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate coated with such a positive electrode active material and a negative electrode active material are disposed with a separator interposed therebetween, and an exterior material, that is, a battery case, for hermetically storing the electrode assembly together with an electrolyte.

[0005] > A lithium secondary battery consists of a positive electrode, a negative electrode, a separator interposed therebetween, and an electrolyte, and is classified into a lithium ion battery (LIB), a lithium polymer battery (PLIB), etc. according to the positive electrode active material and the negative electrode active material used. Usually, the electrodes of these lithium secondary batteries can be formed by applying a positive electrode active material or a negative electrode active material to a current collector such as an aluminum or copper sheet, mesh, film, foil, etc. and drying it.

[0006] Lithium-ion batteries have attracted attention due to their advantages such as high operating voltage and significantly higher energy density. However, because they use organic electrolytes, overcharging can induce overcurrent and overheating, potentially causing explosions or fires.

[0007] Various types of rechargeable batteries include battery modules, in which multiple battery cells are stacked and housed in a case that can protect the battery cells, and battery packs, in which multiple battery modules are housed.

[0008] If a thermal event occurs in a battery cell within a battery module, the thermal energy can become trapped between the battery modules, causing a rapid increase in internal pressure. This could lead to an explosion in one battery module, spreading flames to other adjacent battery modules and potentially causing a chain reaction of fires.

[0009] For example, if there is insufficient free volume (a type of buffer space through which flames or gases can move) between adjacent battery modules located inside a battery pack, the flames or gases cannot move, which increases the internal pressure and thus increases the risk of explosion. [Overview of the project] [Problems that the invention aims to solve]

[0010] The present invention aims to provide a battery pack and an automobile including the same that can prevent a rapid increase in the internal pressure of the battery pack by ensuring free volume between battery modules when a thermal event occurs.

[0011] However, the technical problems that this invention aims to solve are not limited to those described above, 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] According to one aspect of the present invention, a battery pack may be provided that includes 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 housed and which has through holes formed in at least a part of it, and an insertion member inserted into the inside of the pack case.

[0013] In one embodiment, at least a portion of the pack case is comprised of a double-frame structure including a first frame and a second frame arranged parallel to and separated from the first frame by a predetermined gap, wherein the insertion member can be inserted into the gap between the first frame and the second frame.

[0014] In one embodiment, the first frame and the second frame may each be composed of a truss structure in which the through-holes are formed.

[0015] In one embodiment, the truss structure may include a frame portion that forms a frame and a connecting portion that connects the frame portions so that the through holes are formed.

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

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

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

[0019] In one embodiment, the insertion member may be a fire extinguishing agent pad equipped with a fire extinguishing substance.

[0020] In one embodiment, the fire extinguishing substance may include Novec (registered trademark). In one embodiment, it may include a discharge path member that covers at least a part of the battery module at a distance from the battery module and provides a discharge path for flames or gases.

[0021] In one embodiment, a plurality of the discharge path members may be provided, and the plurality of discharge path members may cover the battery module with a preset gap therebetween.

[0022] 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 from inside the lower frame and coupled to the side frame, a partition frame coupled to the inner frame and interposed between the plurality of battery modules, and an upper frame coupled to the side frame. The plurality of discharge path members may be coupled to the side frame and the partition frame.

[0023] In one embodiment, the flames or the gases may be configured to move upward through the gaps between the plurality of discharge path members.

[0024] In one embodiment, a space is formed between the upper frame and the discharge path member, and the flames or the gases may be discharged in a preset direction through the space.

[0025] In addition, according to another aspect of the present invention, an automobile including the aforementioned battery pack may be provided.

Effects of the Invention

[0026] Embodiments of the present invention can prevent the internal pressure of the battery pack from rising rapidly by securing a free volume between battery modules when a thermal event occurs.

[0027] Also, the safety of the battery module can be ensured.

[0028] However, the technical problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the description of the invention below.

Brief Description of the Drawings

[0029] [Figure 1] It is an exploded perspective view of a battery pack according to the first embodiment of the present invention. [Figure 2] It is a cross-sectional view of the battery module included in the battery pack of FIG. 1. [Figure 3] It is an enlarged view of part A in FIG. 1. [Figure 4] It 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. [Figure 5] It is a view showing a state where a part is omitted from the plan view of FIG. 4. [Figure 6] It is a perspective view showing a state where the insertion member is removed from the pack case in a battery pack according to the first embodiment of the present invention. [Figure 7] It is a view showing a state where a part is omitted from the plan view of FIG. 6. [Figure 8] It is a perspective view of a battery pack according to the second embodiment of the present invention. [Figure 9] It is an enlarged view of part B in FIG. 8. [Figure 10] It is a cross-sectional view taken along C-C' of FIG. 8, with a part omitted. [Figure 11] It is a view for explaining an automobile including a battery pack according to each embodiment of the present invention.

Modes for Carrying Out the Invention

[0030] Preferred embodiments of the present invention will now be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and in the claims should not be interpreted in a manner limited to their ordinary or dictionary meanings, but rather in a manner consistent with the technical idea of ​​the present invention, in accordance with the principle that the inventor himself may appropriately define the concepts of terms in order to best describe the invention. Accordingly, it should be understood that the embodiments described herein and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent the entirety of the technical idea of ​​the present invention, and that there may be a variety of equivalents and modifications that can be substituted therein at the time of this application.

[0031] The size of each component or specific part of a component in the drawings may be exaggerated, omitted, or shown schematically for the sake of clarity and ease of explanation. Therefore, the size of each component may not fully reflect its actual size. Specific descriptions of known functions or configurations related to the present invention will be omitted if they are deemed to unnecessarily obscure the gist of the invention.

[0032] As used herein, the terms “joining” or “connecting” include 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 via a connecting member.

[0033] Figure 1 is an exploded perspective view of a battery pack according to the first embodiment of the present invention, Figure 2 is a cross-sectional view of a battery module included in the battery pack of Figure 1, and Figure 3 is an enlarged view of part A in Figure 1. Figure 4 is a perspective view and a partially enlarged view of the insertion member in the battery pack according to the first embodiment of the present invention, and Figure 5 is a view showing a part omitted from the plan view of Figure 4. Figure 6 is a perspective view showing the battery pack according to the first embodiment of the present invention with the insertion member removed from the pack case, and Figure 7 is a view showing a part omitted from the plan view of Figure 6.

[0034] Referring to Figure 1, the 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 insertion member 300.

[0035] The battery module 100 is provided in multiple units and arranged in various ways. For example, as shown in Figure 1, it can be arranged horizontally and vertically, but is not limited to this.

[0036] Referring to Figure 2, the battery module 100 may comprise a plurality of battery cells 110 and a module case 120.

[0037] Multiple battery cells 110 can be stacked on top of each other. The battery cells 110 have diverse structures, and multiple battery cells 110 can be stacked in diverse ways.

[0038] The battery cell 110 may have a structure in which multiple unit cells arranged in the order of positive electrode plate / separator / negative electrode, or bi-cells arranged in the order of positive electrode plate / separator / negative electrode plate / separator / positive electrode plate / separator / negative electrode, are stacked according to the battery capacity.

[0039] The battery cell 110 may be provided with electrode leads. Electrode leads are a type of terminal exposed to the outside and connected to external devices, and may be made of a conductive material. Electrode leads may include positive electrode leads and negative electrode leads.

[0040] The positive electrode lead and the negative electrode lead may be positioned in opposite directions along the longitudinal direction of the battery cell 110, or they may be positioned in the same direction relative to the longitudinal direction of the battery cell 110.

[0041] The battery cell 110 may be provided with a plurality of cartridges (not shown) that house the battery cell 110. Each cartridge (not shown) can be manufactured by injection molding of plastic, and a plurality of cartridges (not shown) with a housing for housing the battery cell 110 can be stacked. The cartridge assembly formed by stacking the plurality of cartridges (not shown) may be provided with connector elements or terminal elements.

[0042] The connector element may include various forms of electrical connection components or connection members for connecting to, for example, a BMS (Battery Management System, not shown) that provides data related to the voltage or temperature of the battery cell 110.

[0043] The terminal element includes a positive terminal and a negative terminal as the main terminals connected to the battery cell 110. The terminal element is equipped with terminal bolts and can be electrically connected to the outside. On the other hand, the battery cell 110 can have a variety of shapes.

[0044] Referring to Figure 2, multiple battery cells 110 are stacked and housed in the module case 120. The module case 120 encloses the multiple battery cells 110, thereby protecting them from external vibrations or shocks.

[0045] The module case 120 may be formed in a shape corresponding to the shape of a stack of multiple battery cells 110. For example, if the stack of multiple battery cells 110 is formed in a hexahedral shape, the module case 120 may also be formed in a corresponding hexahedral shape. However, it is not limited to this. Here, the module case 120 may include an upper module case, a lower module case, and a side module case.

[0046] Furthermore, the module case 120 can be manufactured, for example, by bending a metal plate, thereby allowing the module case 120 to be manufactured as a single unit. When the module case 120 is manufactured as a single unit, the joining process becomes simpler and easier. Alternatively, the module case 120 can be provided as a separate unit and joined by welding or other means. However, the material of the module case 120 is not limited to metal.

[0047] Referring to Figures 1 and 3, the pack case 200 houses multiple battery modules 100. Referring to Figure 6, through holes 244 and 245 are formed in at least a portion of the pack case 200, for example, in the partition frame 240 provided in the pack case 200.

[0048] The pack case 200 may be configured to include, for example, a lower frame 210, a side frame 220, an inner frame 230, a partition frame 240, and an upper frame 250. Here, through holes 244, 245 may be formed in at least one of the side frame 220, the inner frame 230, and the partition frame 240.

[0049] The lower frame 210 is configured to accommodate multiple battery modules 100. The lower frame 210 may, but is not limited to, be formed in the shape of a rectangular plate. The lower frame 210 forms the bottom of the pack case 200.

[0050] 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 predetermined space 600 between it and the lower frame 210. Multiple 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 long side frames with relatively long lengths and short side frames with relatively short lengths. Alternatively, all of the side frames 220 may be of the same length.

[0051] The inner frame 230 extends upward within the lower frame 210 and connects to the side frame 220 and the bulkhead frame 240. There may be more than one inner frame 230, and multiple battery modules 100 can be arranged facing each other with respect to the inner frame 230.

[0052] The partition frame 240 is connected to the inner frame 230. The partition frame 240 is interposed between multiple battery modules 100. In Figure 1, one partition frame 240 is positioned between two adjacent battery modules 100, but this is not the only option. The partition frame 240 is also positioned at the ends of the battery modules 100.

[0053] The upper frame 250 is connected to the side frame 220. As will be described in detail later, a space 600 through which flames or gases are discharged may be formed between the upper frame 250 and the discharge path member 400 (see Figure 10).

[0054] At least a portion of the pack case 200 may be composed of a double-frame structure including a first frame 241 and a second frame 242. Referring to Figure 1, the partition frame 240 is composed of a double-frame structure, but the side frames 220 and the inner frame 230 may also be composed of a double-frame structure. In the following explanation, for the sake of clarity, we will focus on the case where the partition frame 240 is composed of a double-frame structure of the first frame 241 and the second frame 242.

[0055] Referring to Figures 1 and 4, the first frame 241 of the bulkhead frame 240 is located in close proximity to the battery module 100. Referring to Figure 6, the first through-hole 244 is formed in the first frame 241. The first frame 241 may be made from a metal material, but is not limited to that. The first frame 241 may be in the shape of a rectangular plate, but is not limited to that.

[0056] The second frame 242 of the partition frame 240 is positioned parallel to the first frame 241, separated by a predetermined gap 243 (see Figure 7). Referring to Figure 6, a second through-hole 245 is formed in the second frame 242. The second frame 242 may be made from the same material as the first frame 241. For example, it may be made from a metal material, but the material is not limited to this. The second frame 242 may also be formed in the same shape as the first frame 241, for example, it may be in the shape of a rectangular plate, but the shape is not limited to this.

[0057] Referring to Figures 5 and 7, the 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.

[0058] Referring to Figure 6, the first frame 241 and the second frame 242 may each be composed of a truss structure with through holes 244 and 245 formed therein. The truss structure can be diverse. For example, referring to Figures 4 and 6, the truss structure may include a frame section 246 and a connecting section 247.

[0059] The frame portion 246 is configured to form the frame of the frame (first frame 241 or second frame 242). The connecting portion 247 connects the frame portions 246 so that through holes 244 and 245 are formed. Referring to Figure 6, the first frame 241 and the second frame 242 are provided with a truss structure by multiple right-angled triangular through holes 244 and 245, but the shape of the through holes 244 and 245 is not limited to this and can be formed in various ways.

[0060] The truss structure of the frame ensures the rigidity of the Pack Case 200.

[0061] Referring to Figures 1, 4, and 5, the insert member 300 can be inserted inside the pack case 200, for example, inside the partition frame 240 within the pack case 200. The insert member 300 can be made from a material that melts at a preset temperature.

[0062] As mentioned above, if a thermal event occurs in the battery cell 110 inside the battery module 100, the thermal energy can become trapped between the battery modules 100, causing the internal pressure to rise rapidly.

[0063] As shown in Figure 1, if the space between one partition frame 240 and an adjacent partition frame 240 is narrow and there is insufficient free volume to act as a buffer space, when a thermal event occurs, flames or gases may not be able to move into the free volume, which could increase the internal pressure and cause the battery pack 10 to explode.

[0064] To prevent this, the battery pack 10 according to the first embodiment of the present invention has a structure in which through holes 244 and 245 are formed in the first frame 241 and the second frame 242, respectively, and an insertion member 300 is inserted between the first frame 241 and the second frame 242, as described above.

[0065] Here, as mentioned above, the insert member 300 can be made from a material that melts at a preset temperature. When a thermal event occurs in the battery cell 110, and the temperature rises due to a flame or the like, the insert member 300 melts at the preset temperature. When the insert member 300 melts, the flame 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.

[0066] As the insert member 300 melts in this way, it communicates with the adjacent space through the through holes 244 and 245 of the first frame 241 and the second frame 242, thereby increasing the free volume to which the flame or gas can move, and as a result, preventing an increase in the internal pressure of the battery pack 10.

[0067] If a heat event occurs inside the battery pack 10 and the flame immediately moves to the side, it could affect adjacent batteries. Therefore, the insert member 300 prevents the flame from moving in the initial stages of the heat event. When the insert member 300 melts after some time has passed, the flame or gas has been sufficiently vented (e.g., upper venting), so the high temperature removes the insert member 300, which further enhances the provision of free volume.

[0068] In other words, in the initial stages when a flame is generated in any battery module 100 inside the battery pack 10, the insertion member 300 can prevent the flame from spreading to adjacent battery modules 100. Then, as time passes and the flame or gas is vented, the insertion member 300 melts due to the high temperature, ensuring free volume, which in turn prevents an increase in the internal pressure of the battery pack 10.

[0069] 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 will change depending on the specifications or model of the battery pack 10, and the specific melting temperature may be determined by experimentation or other means.

[0070] For this purpose, the insert member 300 can be made from a variety of materials. For example, the insert member 300 may be made of a silicone pad. Alternatively, in other embodiments, the insert member 300 may be made of a mica pad. The silicone pad and the mica pad may be selected based on the ignition temperature or flame temperature of the battery cells 110 stacked inside the battery module 100. Here, since mica is a fire-resistant material and melts at a higher temperature than the silicone pad, a mica pad may be used as the insert member 300 in specifications or models where high-temperature flames are generated.

[0071] In a modified embodiment, the insertion member 300 may be a fire extinguishing agent pad equipped with a fire extinguishing substance. For example, the inside of the insertion member 300 may be filled with a fire extinguishing substance. When the insertion member 300 is melted by flames through the through holes 244 and 245 of the frames 241 and 242, the fire extinguishing substance inside the insertion member 300 flows out, thereby removing the flames. Furthermore, the melting of the insertion member 300 also makes it possible to secure free volume, which has the effect of reducing the internal pressure of the battery pack 10.

[0072] Here, a variety of fire extinguishing materials can be cited, and for example, they may include, but are not limited to, Novec (registered trademark).

[0073] Figure 8 is a perspective view of a battery pack 10 according to a second embodiment of the present invention, Figure 9 is an enlarged view of portion B in Figure 8, and Figure 10 is a cross-sectional view taken along C-C' in Figure 8, with some parts omitted.

[0074] Referring to Figure 8, the second embodiment of the present invention differs from the first embodiment in that it includes a discharge path member 400. However, for parts that are common with the first embodiment, the description of the first embodiment above will be used instead. Also, any parts of the second embodiment that are applicable to the first embodiment can be applied to the first embodiment.

[0075] Referring to Figure 8, the exhaust path member 400 is located away from the battery module 100 and covers at least a portion of the battery module 100, providing an exhaust path for flames or gases. The exhaust path member 400 can be configured in various ways. For example, as shown in Figure 8, there may be multiple exhaust path members 400, and the multiple exhaust path members 400a, 400b, and 400c may be separated from each other by a predetermined gap 500.

[0076] Referring to Figures 8 and 9, the multiple discharge path members 400a, 400b, and 400c are arranged spaced apart from each other and cover the battery module 100. In Figure 8, three discharge path members 400a, 400b, and 400c cover the battery module 100, but the number of discharge path members 400 is not limited to this and can be varied in various ways.

[0077] 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 partition frame 240, and an upper frame 250. A detailed explanation relating thereto is provided in the preceding description.

[0078] Furthermore, the multiple discharge path members 400a, 400b, and 400c can be connected to the side frame 220 and the partition wall frame 240. In this case, as in Figure 10, a space 600 can be formed between the upper frame 250 and each of the multiple discharge path members 400a, 400b, and 400c.

[0079] For example, if a thermal event occurs in a battery cell 110 within a battery module 100, flames or gases may move upward through the gaps 500 between the multiple exhaust path members 400a, 400b, 400c (for example, between two adjacent exhaust path members 400a, 400b located close to each other).

[0080] Furthermore, flames or gases that have moved upward through the gaps 500 between the multiple discharge path members 400a, 400b, and 400c can be discharged in a predetermined direction through the space 600 between the upper frame 250 and the discharge path members 400. Here, the space 600 between the upper frame 250 and the discharge path members 400 provides a passage for the movement of flames or gases.

[0081] In this way, when flames or gases move through the space 600 between the upper frame 250 and the exhaust path member 400, it is possible to prevent the flames or gases from flowing back into the battery module 100 where the thermal event occurred.

[0082] For example, if only the upper frame 250 is provided and the exhaust path member 400 is not provided, flames or gases generated by a thermal event may move upward, hit the upper frame 250 and be reflected, potentially causing the flames or gases to flow back into the battery module 100 where the thermal event occurred. When flames or gases flow back into the battery module 100 in this way, it accelerates the ignition rate of the module and increases the risk of explosion.

[0083] However, in the case of the battery pack 10 according to the second embodiment of the present invention, since an exhaust path member 400 is provided below the upper frame 250, even if flames or gases hit the upper frame 250 and are reflected, they are blocked by the exhaust path member 400, preventing backflow into the battery module 100. This has the effect of reducing the risk of explosion of the battery module 100 when a thermal event occurs.

[0084] Figure 11 is a diagram illustrating an automobile including a battery pack 10 according to each embodiment of the present invention.

[0085] Referring to Figure 11, an automobile 20 according to one embodiment of the present invention may include one or more battery packs 10 according to the embodiments described above. Here, the automobile 20 includes various types of automobiles that use electricity, such as electric vehicles or hybrid vehicles.

[0086] In this specification, terms indicating direction such as up, down, left, right, front, and back are used. However, such terms indicate relative positions and are used only for the convenience of explanation. It is obvious to those skilled in the art that these positions can change depending on the position of the object in question, the observer's position, etc.

[0087] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto, and of course, various modifications and variations are possible within the equivalent scope of the technical concept of the present invention and the claims below by persons with ordinary skill in the art to which the present invention pertains. Therefore, the embodiments described above should be considered from an explanatory rather than restrictive viewpoint. That is, the true technical concept of the present invention is shown in the claims, and all differences within the equivalent scope thereto should be interpreted as being included in the present invention. [Industrial applicability]

[0088] The present invention relates to a battery pack and an automobile including the same, and is particularly applicable to the secondary battery industry. [Explanation of symbols]

[0089] 10 Battery Packs 20 Automobiles 100 Battery Modules 110 battery cells 120 Module Case 200 pack case 210 Lower frame 220 Side Frame 230 Inner frame 240 bulkhead frame 241 First Frame 242 Frame 2 243 Gap 244 First through hole 245 Second through hole 246 Frame section 247 Connecting part 250 Upper Frame 300 Insertion Member 400 Discharge path member 400a Discharge path member 400b Discharge path member 400c Discharge path component 500 gap 600 space

Claims

1. Multiple battery modules, each consisting of multiple battery cells stacked on top of each other, A pack case in which the aforementioned multiple battery modules are housed and which has through holes formed in at least a portion thereof, A battery pack comprising an insertion member inserted into the inside of the pack case.

2. At least a portion of the aforementioned pack case is The first frame and, It is composed of a double frame structure including a second frame which is arranged parallel to the first frame at a predetermined gap between them, The battery pack according to claim 1, characterized in that the insertion member is inserted into the gap between the first frame and the second frame.

3. The battery pack according to claim 2, characterized in that the first frame and the second frame are each composed of a truss structure in which the through holes are formed.

4. The aforementioned truss structure is A frame part that forms the frame, The battery pack according to claim 3, further comprising a connecting portion that connects the frame portions so that the through holes are formed.

5. The battery pack according to claim 3, characterized in that the insertion member is made of a material that melts at a preset temperature.

6. The battery pack according to claim 5, characterized in that the insertion member is composed of a silicone pad.

7. The battery pack according to claim 1, characterized in that the insertion member is composed of a mica pad.

8. The battery pack according to claim 1, characterized in that the insertion member is a fire extinguishing agent pad equipped with a fire extinguishing substance.

9. The battery pack according to claim 8, characterized in that the fire extinguishing substance contains Novec.

10. The battery pack according to claim 1, further characterized by including an exhaust path member that covers at least a portion of the battery module at a distance from the battery module and provides a path for exhausting flames or gases.

11. The battery pack according to claim 10, characterized in that a plurality of discharge path members are provided, and the plurality of discharge path members are spaced apart with a predetermined gap between them to cover the battery module.

12. The aforementioned pack case is The lower frame on which the aforementioned multiple battery modules are mounted, A side frame extending upward from the edge of the lower frame, An inner frame extending upward from the inside of the lower frame and connected to the side frame, A partition frame connected to the inner frame and interposed between the plurality of battery modules, Includes an upper frame connected to the side frame, The battery pack according to claim 11, characterized in that the plurality of discharge path members are coupled to the side frame and the partition wall frame.

13. The battery pack according to claim 12, characterized in that the flame or gas moves upward through the gaps between the plurality of discharge path members.

14. The battery pack according to claim 13, characterized in that a space is formed between the upper frame and the discharge path member, and the flame or gas is discharged through the space in a predetermined direction.

15. An automobile comprising a battery pack according to any one of claims 1 to 14.

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