Battery pack and vehicle including the same

Abstract

A battery pack and a vehicle including the same are disclosed. A battery pack according to an embodiment of the present invention comprises: 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 a fastening member for fastening the battery pack case. The fastening member is configured to be separated by an internal pressure of the battery pack case.

Description

TECHNICAL FIELD

[0001] This application is based upon and claims the benefit of priority from Korean Patent Application No. 10-2024-0053579, filed on April 22, 2024, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference.

[0002] The disclosure relates to a battery pack and a vehicle including the same, and more particularly, to a battery pack capable of uniformly dispersing heat and smoothly discharging gas when a thermal event occurs and a vehicle including the same. BACKGROUND

[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-hydrogen battery, or a nickel-zinc battery. A battery cell corresponding to the most basic secondary battery can provide an output voltage of about 2.5 V to 4.2 V.

[0004] Recently, as these battery cells are applied to devices requiring a high output voltage and a large charge capacity, such as an electric vehicle or an ESS (energy storage system), a battery module composed of a plurality of battery cells connected in series, in parallel, or in a combination of series and parallel, and a battery pack composed of battery modules connected again in series, in parallel, or in a combination of series and parallel, are widely used.

[0005] Lithium secondary batteries are currently of great interest due to their advantages such as a high operating voltage and a significantly high energy density. However, because they use an organic electrolyte, overcharging of lithium secondary batteries can cause overcurrent and overheating, which can lead to explosion or ignition in serious cases.

[0006] Various types of secondary batteries include a battery module including a module case capable of protecting a battery cell and a plurality of battery cells stacked and inserted into the module case, and a battery pack including a plurality of battery modules.

[0007] Figure 1 is a cross-sectional view showing a conventional battery pack.

[0008] Referring to Figure 1 In the conventional battery pack 1, the upper frame 2 is fixed to the partition frame 4 by the bolt 3. That is, in the conventional battery pack 1, since the upper frame 2 is firmly fixed by the bolt 3, when a flame is generated, a free space or a buffer space through which heat or gas caused by the flame can move is not formed.

[0009] In this state, if a flame is generated in the battery cell 5, heat caused by the flame is blocked by the upper frame 2 from spreading and is concentrated within the battery module 6 in which the flame is generated. In addition, since gas generated within the battery module 6 cannot be discharged, the internal pressure increases and the possibility of explosion of the battery module 6 or the battery pack 1 increases.

[0010] At this time, if an explosion occurs in the battery module 6 in which the flame is generated, the flame can spread to another battery module 6, thereby causing a thermal runaway phenomenon, and if the flame leaks to the outside due to the thermal runaway phenomenon, there is a problem that the driver of the electric vehicle can be burned or in a dangerous situation.

[0011] Alternatively, there is a problem that the battery module 6 or the battery pack 1 is damaged or burned due to a chain reaction of the flame caused by the flame propagation, and thus it can be impossible to secure stability of the battery module 6 or the battery pack 1. SUMMARY

[0012] TECHNICAL PROBLEM

[0013] The disclosure aims to solve the problems of the related art, and thus the disclosure aims to provide a battery pack that can prevent heat concentration by uniformly dispersing heat caused by a flame inside the battery pack when a single battery cell generates a flame, thereby achieving uniform heat distribution, and a vehicle including the same.

[0014] In addition, the disclosure aims to provide a battery pack that facilitates gas discharge to easily discharge gas, and a vehicle including the same.

[0015] In addition, the disclosure aims to provide a battery module that can prevent a thermal runaway phenomenon by preventing a chain reaction of a flame caused by flame propagation, and a battery pack and a vehicle including the same.

[0016] However, the technical problems to be solved by the disclosure are not limited to the above-mentioned problems, and those skilled in the art will clearly understand other problems not mentioned herein from the following description.

[0017] TECHNICAL SOLUTION

[0018] In one aspect of the disclosure, a battery pack includes a plurality of battery modules in which a plurality of battery cells are stacked, a battery pack case in which the plurality of battery modules are accommodated, and a fastening member configured to fasten the battery pack case, wherein the fastening member is configured to be separated by internal pressure of the battery pack case.

[0019] In an embodiment, the battery pack case can have an insertion hole formed in the battery pack case, and the fastening member can include a bolt coupled to one side of the battery pack case, and a shaft member inserted into the insertion hole and coupled to the bolt so as to be detachable from the bolt.

[0020] In an embodiment, the shaft member can have a screw thread formed on the shaft member and be screw-coupled into the insertion hole.

[0021] In an embodiment, the bolt can have an inner groove formed on the bolt, and the shaft member can be detachably inserted into the inner groove of the bolt.

[0022] In an embodiment, the shaft member can include a first coupling portion coupled to the insertion hole, and a second coupling portion coupled to the inner groove of the bolt, the first coupling portion can be provided as a threaded portion on which a screw thread is formed, and the second coupling portion can be provided as a non-threaded portion on which a screw thread is not formed.

[0023] In an embodiment, a diameter of the first coupling portion can be formed to be greater than a diameter of the second coupling portion.

[0024] In an embodiment, a gap prevention member can be coupled to the second coupling portion to prevent a gap from being formed with the inner groove.

[0025] In an embodiment, the gap prevention member can be a rubber bushing.

[0026] In an embodiment, the battery pack case can include an upper frame, and a separator frame fastened to the upper frame by the fastening member, the insertion hole can be formed in the separator frame, and the shaft member can be inserted and fixed into the insertion hole of the separator frame.

[0027] In an embodiment, the fastening member can include a nut coupled to the upper frame, and the bolt can be coupled to the nut and the shaft member, respectively.

[0028] In an embodiment, the nut can be coupled to the upper frame by welding.

[0029] In an embodiment, the nut can be separated from the separator frame.

[0030] In an embodiment, when a flame is generated in the battery cell and the pressure inside the battery pack case increases, the bolt can be separated from the shaft member so that the upper frame is deformed upward, and a buffer space can be formed between the upper frame and the battery module.

[0031] In an embodiment, the battery pack case can have an exhaust portion formed in the battery pack case, and when the upper frame is deformed, gas generated from the battery cell can move to the exhaust portion.

[0032] Further, according to another aspect of the present disclosure, a vehicle including at least one battery pack as described above can be provided.

[0033] Advantageous Effects

[0034] Embodiments of the present disclosure have an effect of preventing heat concentration by uniformly dispersing heat caused by a flame within a battery pack when a flame is generated in a single battery cell, thereby achieving uniform heat distribution.

[0035] Further, the present disclosure has an effect of facilitating exhaust and allowing gas to be easily discharged.

[0036] Further, the present disclosure has an effect of preventing a thermal runaway phenomenon by preventing a flame chain reaction caused by flame propagation.

[0037] The accompanying drawings illustrate preferred embodiments of the present disclosure and together with the foregoing disclosure, provide further understanding of the technical features of the present disclosure, thus, the present disclosure is not to be interpreted as being limited to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0038] The accompanying drawings illustrate preferred embodiments of the present disclosure and together with the foregoing disclosure, provide further understanding of the technical features of the present disclosure, thus, the present disclosure is not to be interpreted as being limited to the accompanying drawings.

[0039] Figure 1 is a cross-sectional view illustrating a conventional battery pack.

[0040] Figure 2 is an exploded perspective view illustrating a battery pack according to an embodiment of the present disclosure.

[0041] Figure 3 is an exploded perspective view illustrating a bolt and a shaft member in a battery pack according to an embodiment of the present disclosure.

[0042] Figure 4 is a partial cross-sectional view illustrating a battery pack according to an embodiment of the present disclosure in which a bolt is separated from a shaft member fixed to a partition frame and a nut coupled to an upper frame.

[0043] Figure 5is a view showing a bolt coupled to a shaft member and a nut in Figure 4

[0044] Figure 6 is a view showing a bolt separated from a shaft member due to internal pressure of a battery pack case in Figure 5

[0045] Figure 7 is a sectional view showing that a buffer space is formed due to deformation of an upper frame when a bolt is separated from a shaft member due to internal pressure of a battery pack case in a battery pack according to an embodiment of the disclosure.

[0046] Figure 8 is a partial perspective view showing a battery pack according to a modified embodiment of the disclosure.

[0047] Figure 9 is a view for showing a vehicle including a battery pack according to each embodiment of the disclosure. DETAILED DESCRIPTION

[0048] Hereinafter, preferred embodiments of the disclosure will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terms used in the specification and the appended claims should not be interpreted as being limited to general and dictionary meanings but interpreted based on the meanings and concepts corresponding to technical aspects of the present disclosure on the basis of the principle that the inventor is allowed to define appropriate terms in order to best explain the present disclosure. Therefore, the description presented herein is merely a preferred example for the purpose of illustrations only and should not be construed in a limiting sense based on this preferred example and accordingly it should be understood that other equivalents and modifications could be made thereto without departing from the scope of the present disclosure.

[0049] In the drawings, the size of each component or a specific portion of a constituent component is exaggerated, omitted, or schematically shown for the sake of convenience and clarity of description. Therefore, the size of each component does not completely reflect the actual size. If it is determined that a detailed description of a related known function or configuration can unnecessarily obscure the gist of the present disclosure, such a description will be omitted.

[0050] As used herein, the term "coupled" or "connected" not only refers to cases in which a member is directly coupled or directly connected to another member, but also refers to cases in which a member is indirectly coupled or indirectly connected to another member through a link member.

[0051] Figure 2 is an exploded perspective view showing a battery pack according to an embodiment of the disclosure, Figure 3 is an exploded perspective view showing a bolt and a shaft member in a battery pack according to an embodiment of the disclosure, Figure 4 ​​is a partial cross-sectional view illustrating a battery pack according to an embodiment of the disclosure in which a bolt is separated from a shaft member fixed to a separator frame and a nut coupled to an upper frame, Figure 5 is a view illustrating Figure 4 the bolt in Figure 6 is a view illustrating Figure 5 the bolt in Figure 7 is a cross-sectional view illustrating a buffer space formed due to deformation of an upper frame when a bolt is separated from a shaft member due to internal pressure of a battery pack case in a battery pack according to an embodiment of the disclosure.

[0052] Referring to Figure 2 , a battery pack 10 according to an embodiment of the disclosure can include a plurality of battery modules 100, a battery pack case 200, and a fastening member 300.

[0053] The battery modules 100 are accommodated in the battery pack case 200. Furthermore, a plurality of battery cells 110 (see Figure 7 ) are stacked in each of the battery modules 100, and the plurality of battery modules 100 can be provided and arranged in various ways. For example, the battery modules 100 can be arranged in a horizontal direction and a vertical direction, but are not limited thereto.

[0054] Referring to Figure 7 , the battery module 100 can have a plurality of battery cells 110 and a module case 120.

[0055] The plurality of battery cells 110 can be stacked. The battery cells 110 can have various structures, and further, the plurality of battery cells 110 can be stacked in various ways.

[0056] The battery cell 110 can have a structure in which a plurality of unit cells in which a positive electrode plate, a separator, and a negative electrode plate are sequentially arranged, or a plurality of double cells in which a positive electrode plate, a separator, a negative electrode plate, a separator, a positive electrode plate, a separator, and a negative electrode plate are sequentially arranged, are stacked according to a battery capacity.

[0057] The battery cell 110 can be equipped with an electrode lead. The electrode lead is a terminal exposed to the outside and connected to an external device, and can use an electrically conductive material. The electrode lead can include a positive electrode lead and a negative electrode lead.

[0058] The positive electrode lead and the negative electrode lead can be arranged in opposite directions with respect to a length direction of the battery cell 110, or the positive electrode lead and the negative electrode lead can be arranged in the same direction with respect to the length direction of the battery cell 110.

[0059] The battery cell 110 can be provided with a plurality of battery cartridges (not shown) that accommodate the battery cell 110. Each battery cartridge (not shown) can be manufactured by injection molding of plastic, and a plurality of battery cartridges (not shown) having an accommodation portion that accommodates the battery cell 110 can be stacked. The battery cartridge assembly in which the plurality of battery cartridges (not shown) are stacked can be provided with a connector element or a terminal element.

[0060] The connector element can include various types of electrical connection parts or connection 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.

[0061] 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 equipped with a terminal bolt so that the terminal element can be electrically connected to the outside. In addition, the battery cell 110 can have various shapes.

[0062] A plurality of battery cells 110 are stacked and accommodated in the module case 120. The module case 120 surrounds the plurality of battery cells 110, thereby protecting the battery cells 110 from external vibrations or impacts.

[0063] The module case 120 can be formed in a shape corresponding to the shape of a stack in which the plurality of battery cells 110 are stacked. For example, if the stack in which the plurality of battery cells 110 are stacked is formed in a hexahedral shape, the module case 120 can also be formed in a hexahedral shape corresponding to the hexahedral shape. However, the present disclosure is not limited thereto. Here, the module case 120 can include an upper module case, a lower module case, and a side module case.

[0064] In addition, the module case 120 can be formed by, for example, bending a metal plate, whereby the module case 120 can be manufactured in an integrated form. If the module case 120 is manufactured in an integrated form, the coupling process can become easy and simple. Alternatively, the module case 120 can be provided in a separate form and coupled by welding or the like. However, the material of the module case 120 is not limited to a metal material.

[0065] Referring to Figure 2 , a plurality of battery modules 100 are accommodated in a battery pack case 200. The battery pack case 200 can include, for example, an upper frame 210, a lower frame 220, a side frame 230, and a partition frame 240.

[0066] Referring to Figure 2 and Figure 7The upper frame 210 is coupled to the side frame 230 and the partition frame 240. Here, the upper frame 210 and the partition frame 240 are fastened by a fastening member 300 configured to be separated when the pressure inside the battery pack case 200 increases.

[0067] For example, the fastening member 300 can include a bolt 310 and a shaft member 320, and here, the bolt 310 can be configured to be separated from the shaft member 320 when the pressure inside the battery pack case 200 increases.

[0068] Here, the shaft member 320 can be coupled to the partition frame 240. For example, the shaft member 320 can be inserted and fixed to the partition frame 240, but is not limited thereto.

[0069] In addition, referring to Figure 5 The upper frame 210 can be coupled to the partition frame 240 by the fastening member 300 (for example, the bolt 310 and the shaft member 320). In addition, referring to Figure 2 The upper frame 210 is also fastened to the side frame 230 by the bolt 310.

[0070] In addition, referring to Figure 7 When a thermal event occurs in the battery cell 110 or the like and the pressure inside the battery pack case 200 increases, the upper frame 210 is still fastened to the side frame 230 by the bolt 310, but the bolt 310 is separated from the shaft member 320 due to the internal pressure of the battery pack case 200, so the upper frame 210 is separated from the partition frame 240.

[0071] Therefore, in the case of a thermal event, the upper frame 210 is separated from the partition frame 240, so that a buffer space 400 can be formed between the upper frame 210 and the partition frame 240. This will be explained in detail later.

[0072] Referring to Figure 2 The lower frame 220 is configured so that a plurality of battery modules 100 are placed on the lower frame 220. The lower frame 220 can be formed in a rectangular plate shape, but is not limited thereto. The lower frame 220 forms the bottom of the battery pack case 200.

[0073] The side frame 230 can be configured to extend upward from the edge of the lower frame 220. The side frame 230 defines the height of the battery pack case 200 and forms a predetermined space between the side frame 230 and the lower frame 220.

[0074] In addition, a plurality of battery modules 100 are placed in the space between the side frame 230 and the lower frame 220. The side frame 230 can include a long side frame 230 having a relatively long length and a short side frame 230 having a relatively short length. Alternatively, the lengths of the side frame 230 can all be the same.

[0075] The partition frame 240 extends upward within the lower frame 220 and is coupled to the side frame 230. One or more partition frames 240 can be provided, and the battery modules 100 can be arranged between the plurality of partition frames 240 or between the partition frame 240 and the side frame 230. Here, the partition frame 240 can be arranged in a horizontal direction or a vertical direction within the side frame 230.

[0076] The partition frame 240 can be fastened and coupled to the inner side of the upper frame 210 by the fastening member 300 (e.g., the bolt 310 and the shaft member 320). To this end, referring to Figure 4 An insertion hole 241 can be formed in the partition frame 240, and the shaft member 320 can be inserted into and fixed to the insertion hole 241 of the partition frame 240.

[0077] The fastening member 300 fastens the battery pack case 200, and can be configured to fasten, for example, the upper frame 210 and the partition frame 240 of the battery pack case 200, as Figure 5 indicated. Here, at least a portion (e.g., the shaft member 320) of the fastening member 300 is coupled to the battery pack case 200 and is configured to be separated from the bolt 310 when the pressure within the battery pack case 200 increases, as Figure 6 indicated.

[0078] The fastening member 300 can be configured in various ways, and for example, referring to Figure 3 , the bolt 310 and the shaft member 320 can be included. Referring to Figure 5 , the bolt 310 can be coupled to one side of the battery pack case 200, for example, the upper frame 210.

[0079] In addition, the shaft member 320 can be inserted into the insertion hole 241 formed in the partition frame 240 and coupled to the bolt 310 so as to be detachable from the bolt 310. Here, a thread can be formed on the inner side of the insertion hole 241, or a thread can be formed on the shaft member 320, and the shaft member 320 can be configured to be threadedly coupled to the insertion hole 241.

[0080] In addition, for example, referring to Figure 3 , an inner groove 311 is formed on the bolt 310, and the shaft member 320 can be configured to be detachably inserted into the inner groove 311 of the bolt 310. However, the degree of coupling between the bolt 310 and the shaft member 320 can vary depending on the size of the battery pack case 200, the number of battery modules 100, the capacity of the battery cells 110, etc.

[0081] Referring to Figure 3The shaft member 320 can include a first coupling portion 321 and a second coupling portion 322. The first coupling portion 321 is a portion coupled to the insertion hole 241 of the partition frame 240, and can be configured as a threaded portion having a thread formed thereon. Also, the second coupling portion 322 is a portion inserted into and coupled to the inner groove 311 of the bolt 310, and can be configured as a non-threaded portion having no thread formed thereon.

[0082] That is, referring to Figure 5 , the first coupling portion 321 can be threadedly connected with the insertion hole 241 of the partition frame 240, and the second coupling portion 322 can be inserted into the inner groove 311 of the bolt 310. Also, as Figure 6 indicated, when the pressure inside the battery pack case 200 increases, the second coupling portion 322 of the shaft member 320 can be separated from the inner groove 311 of the bolt 310.

[0083] Here, the diameter of the first coupling portion 321 can be formed to be greater than the diameter of the second coupling portion 322. That is, the diameter of the second coupling portion 322 is formed to be smaller than the diameter of the first coupling portion 321, so that the second coupling portion 322 can be easily separated from the inner groove 311 of the bolt 310 in the case of a thermal event.

[0084] The gap prevention member 340 can be coupled to the second coupling portion 322 to prevent a gap from being formed with the inner groove 311. Since the second coupling portion 322 is simply inserted into the inner groove 311 of the bolt 310, a gap can occur between the second coupling portion 322 and the inner groove 311 of the bolt 310 due to errors in processing, etc.

[0085] In this case, the second coupling portion 322 of the shaft member 320 can be separated from the inner groove 311 of the bolt 310 before a thermal event occurs or before the internal pressure inside the battery pack case 200 reaches a preset range.

[0086] To prevent this, the gap prevention member 340 can be coupled to the second coupling portion 322 and positioned between the second coupling portion 322 and the inner groove 311 of the bolt 310. The gap prevention member can be made of various materials, and can be, for example, a rubber bushing made of rubber, but is not limited thereto.

[0087] Referring to Figures 4 to 6 , the fastening member 300 can include a nut 330 coupled to the upper frame 210, and in this case, the bolt 310 is fastened and coupled to the nut 330 and also to the shaft member 320.

[0088] The nut 330 is coupled to the upper frame 210. Here, the nut 330 can be coupled to the upper frame 210 in various ways, for example, by welding, but is not limited thereto.

[0089] Referring to Figure 5 The nut 330 is separated from the partition frame 240, but the nut 330 can also be in contact with the partition frame 240.

[0090] Here, the bolt 310 is coupled to the shaft member 320, the shaft member 320 is coupled to the partition frame 240, and in addition, the bolt 310 is coupled to the nut 330, the nut 330 is coupled to the upper frame 210 to fasten the upper frame 210 and the partition frame 240. However, the bolt 310 is coupled to the shaft member 320 so as to be separated from the shaft member 320 by a pressure within a preset range.

[0091] Referring to Figure 6 If a thermal event occurs in the battery cell 110 or the like, the pressure within the battery pack 10 increases and the bolt 310 is separated from the shaft member 320. Also, if the bolt 310 is separated from the shaft member 320, the upper frame 210 is separated from the partition frame 240 together with the bolt 310.

[0092] Referring to Figure 7 If a flame is generated in the battery cell 110 to increase the pressure inside the battery pack case 200 such that the bolt 310 is separated from the shaft member 320 and the upper frame 210 is separated from the partition frame 240 and deformed upward, a buffer space 400 is formed between the upper frame 210 and the battery module 100.

[0093] That is, the upper frame 210 is deformed upward to form the buffer space 400 by the flame and gas generated from the battery cell 110, and as heat from the flame is diffused to the other battery module 100 through the buffer space 400, uniform heat distribution overall is achieved, and heat can be prevented from being concentrated in any one battery module 100.

[0094] Figure 8 is a partial perspective view showing a battery pack according to a modified embodiment of the present disclosure.

[0095] Referring to Figure 8 The modified embodiment differs from the previous embodiment in that an exhaust portion 250 is formed in the battery pack case 200. However, features of the modified embodiment that are common to the previous embodiment will not be described in detail again. In addition, features of the modified embodiment that are applicable to the previous embodiment can be applied to the previous embodiment.

[0096] Referring to Figure 8An exhaust portion 250 is formed in the battery pack case 200. As described above, if the internal pressure of the battery pack case 200 increases such that the bolt 310 is separated from the shaft member 320 and the upper frame 210 is deformed, the gas generated from the battery cell 110 can move to the exhaust portion 250 and be discharged.

[0097] Here, the exhaust portion 250 can include an exhaust hole 251 and an exhaust valve 252. The exhaust hole 251 is a hole through which the gas generated from the battery cell 110 is discharged, and can be formed in the battery pack case 200 (for example, the side frame 230), but is not limited thereto.

[0098] Further, the exhaust valve 252 can be installed in the exhaust hole 251. The exhaust valve 252 can be configured in various ways. For example, the exhaust valve 252 can be configured to close the exhaust hole 251 and open when the internal pressure of the battery pack case 200 exceeds a preset value.

[0099] That is, the exhaust valve 252 generally blocks the exhaust hole 251, but when the gas leaks from the battery cell 110 and the internal pressure of the battery pack case 200 exceeds a preset value or a preset range, the exhaust valve 252 opens and the gas is discharged from the battery pack case 200 through the exhaust hole 251.

[0100] As described above, if the upper frame 210 is deformed upward by the flame and gas generated from the battery cell 110 to form the buffer space 400, the gas moves along the buffer space 400 to the exhaust portion 250, and when the exhaust valve 252 is opened by the pressure of the gas, the gas can be discharged to the outside of the battery pack case 200.

[0101] That is, the buffer space 400 formed by the deformation of the upper frame 210 helps exhaust, allowing the gas to be easily discharged.

[0102] Further, as described above, since the heat is diffused to the other battery modules 100 through the buffer space 400, the heat is prevented from being concentrated on any one battery module 100, thereby achieving uniform heat distribution.

[0103] Also, since the gas discharge is facilitated by the buffer space 400 formed between the upper frame 210 and the battery module 100, it is ultimately possible to prevent the thermal runaway phenomenon by preventing the flame chain reaction due to the flame propagation.

[0104] Figure 9 is a diagram for illustrating a vehicle including a battery pack according to each embodiment of the disclosure.

[0105] Referring to Figure 9According to the embodiments of the present disclosure, the vehicle 20 can include one or more battery packs 10 according to each of the above-described embodiments. Here, the vehicle 20 includes various vehicles designed to use electric power, such as an electric vehicle or a hybrid electric vehicle.

[0106] When the terms indicating directions, such as up, down, left, and right, as used herein are used only for the convenience of description, these terms are merely for the convenience of explanation, and it is obvious to those skilled in the art that these terms can change according to the position of the stated element or the observer.

[0107] The present disclosure has been described in detail. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the present disclosure, are given by way of illustration only and are not by way of limitation as various changes and modifications within the scope of the present disclosure will become apparent to those skilled in the art from this detailed description. Therefore, the previously disclosed embodiments should be considered in the light of illustrative rather than limiting. In other words, the scope of the true technical idea of the present disclosure is shown in the claims, and all differences within the equivalent scope should be interpreted as included in the present disclosure.

[0108] Industrial applicability

[0109] The present disclosure relates to a battery pack and a vehicle including the same, and is particularly applicable to the industry related to secondary batteries.

Claims

1. A battery pack, the battery pack comprising: Multiple battery modules, in which multiple battery cells are stacked; A battery pack housing, in which the plurality of battery modules are housed; as well as Fastening members, configured to secure the battery pack housing. The fastening member is configured to be separated by the internal pressure of the battery pack housing.

2. The battery pack according to claim 1, in, The battery pack housing has an insertion hole formed in the battery pack housing, and The fastening components include: Bolts, said bolts being connected to one side of the battery pack housing; and A shaft member that is inserted into the insertion hole and connected to the bolt so that it can be disengaged from the bolt.

3. The battery pack according to claim 2, in, The shaft member has threads formed on the shaft member and is threadedly connected to the insertion hole.

4. The battery pack according to claim 2, in, The bolt has an inner groove formed on the bolt, and The shaft member can be detachably inserted into the inner groove of the bolt.

5. The battery pack according to claim 4, in, The shaft member includes: A first connecting portion, the first connecting portion being connected to the insertion hole; and The second connecting part is connected to the inner groove of the bolt. The first connecting part is configured as a threaded part with threads formed thereon, and the second connecting part is configured as a non-threaded part without threads formed thereon.

6. The battery pack according to claim 5, in, The diameter of the first connecting part is larger than the diameter of the second connecting part.

7. The battery pack according to claim 5, in, A gap-prevention component is attached to the second connection to prevent gaps from forming with the inner groove.

8. The battery pack according to claim 7, in, The anti-gap component is a rubber bushing.

9. The battery pack according to claim 2, in, The battery pack housing includes: upper frame; and A partition frame, which is fastened to the upper frame by the fastening members. The insertion hole is formed in the partition frame, and the shaft member is inserted into and fixed to the insertion hole of the partition frame.

10. The battery pack according to claim 9, in, The fastening member includes a nut connected to the upper frame, and The bolts are respectively connected to the nut and the shaft member.

11. The battery pack according to claim 10, in, The nut is welded to the upper frame.

12. The battery pack according to claim 10, in, The nut is separated from the partition frame.

13. The battery pack according to claim 9, in, When a flame is generated in the battery cell and the pressure inside the battery pack housing increases, the bolt separates from the shaft member, causing the upper frame to deform upward and forming a buffer space between the upper frame and the battery module.

14. The battery pack according to claim 9, in, The battery pack housing has an exhaust portion formed within the battery pack housing, and When the upper frame deforms, the gas generated from the battery cell moves to the exhaust section.

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

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