Battery pack

Abstract

A battery pack is disclosed. A battery pack according to an embodiment of the present invention comprises: a base plate; an outer side wall coupled to an upper surface of the base plate; the plurality of battery cells are positioned on the bottom plate and form an array; and a side structure located above the base plate, extending longitudinally along one side of the base plate and separating the plurality of battery cells from the base plate.

Description

Technical Field

[0001] The present invention relates to a battery pack.

[0002] This application is based on and claims priority to Korean Patent Application No. 10-2023-0120715 filed with the Korean Intellectual Property Office on September 11, 2023, the disclosure of which is incorporated herein by reference in its entirety. Background Art

[0003] The demand for portable electronic devices such as laptop computers, cameras, and mobile phones has increased sharply, and with the widespread use of robots and electric vehicles, many studies are being conducted on high-performance secondary batteries that can be repeatedly charged.

[0004] Currently, commercially available secondary battery packs include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, lithium secondary batteries, etc. Among them, lithium secondary batteries have little or no memory effect, so they have received more attention than nickel-based secondary batteries because of their advantages that they can be recharged as long as it is convenient, have a very low self-discharge rate, and have a high energy density.

[0005] 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 including a positive electrode plate and a negative electrode plate coated with a positive electrode active material and a negative electrode active material, respectively, with a separator inserted between the positive electrode plate and the negative electrode plate; and an external packaging material or a battery case that hermetically accommodates the electrode assembly and an electrolyte solution.

[0006] Generally, according to the shape of the outer packaging material, lithium secondary batteries can be classified into can-type secondary batteries in which the electrode assembly is included in a metal can and pouch-type secondary batteries in which the electrode assembly is included in a pouch of an aluminum laminate.

[0007] Recently, secondary batteries are widely used not only for power or energy storage in small devices such as mobile electronic devices but also for power or energy storage in medium and large devices such as electric vehicles or energy storage systems (ESSs). A plurality of secondary batteries can be electrically connected and accommodated in a module case to form a battery module. In addition, a plurality of battery modules can be connected to form a battery pack.

[0008] However, when multiple secondary batteries (battery cells) or multiple battery modules are densely packaged in a narrow space, they may be susceptible to thermal events. In particular, when an event such as thermal runaway occurs in any one of the battery cells, high gas, flame, or heat can be generated. In the case where the gas, flame, or heat is transferred to other battery cells included in the same battery module, an explosive chain reaction such as thermal propagation may occur. Additionally, the chain reaction may cause a fire or explosion not only in the corresponding battery module but also in other battery modules.

[0009] Furthermore, since medium or large-sized battery packs for electric vehicles include a large number of battery cells and battery modules to increase output and / or capacity, they have a higher risk of chain reaction. In addition, the battery pack installed on an electric vehicle can be located near a user such as a driver. Therefore, in the case where a thermal event in a specific battery module cannot be properly controlled, a chain reaction occurs, resulting in serious economic losses and human losses. SUMMARY OF THE INVENTION

[0010] TECHNICAL PROBLEM

[0011] An object of the present disclosure is to solve these and other problems.

[0012] Another object of the present disclosure is to provide a battery pack that is easy to control exhaust.

[0013] Still another object of the present disclosure is to provide a battery pack having improved assembly efficiency.

[0014] Still another object of the present disclosure is to provide a battery pack having improved energy density.

[0015] TECHNICAL SOLUTION

[0016] To achieve the above objects, a battery pack according to an embodiment of the present disclosure includes: a bottom plate; an outer sidewall coupled to an upper surface of the bottom plate; a plurality of battery cells located on the bottom plate and forming an array; and a side structure located on the bottom plate, extending along one side of the bottom plate, and configured to keep the plurality of battery cells spaced apart from the bottom plate.

[0017] In addition, the side structure may include a main body extending and configured to cover side surfaces of the plurality of battery cells.

[0018] In addition, the main body may include a curved portion formed along the side surfaces of the battery cells.

[0019] In addition, the side structure may further include: a plurality of bottom ribs protruding from the main body; and a plurality of top ribs protruding from the main body and located above the plurality of bottom ribs, and the plurality of battery cells may be mounted between the plurality of bottom ribs and the plurality of top ribs.

[0020] In addition, the side structure may further include a partition portion protruding from the main body and located between adjacent battery cells among the plurality of battery cells.

[0021] In addition, the side structure may include: a head formed at an end of the main body and configured to cover the plurality of battery cells; and an exhaust hole formed at the head and communicating with a gap between the plurality of battery cells and the bottom plate.

[0022] In addition, the exhaust hole may open downward.

[0023] In addition, the height of the exhaust hole may be lower than the height of the bottom rib.

[0024] Furthermore, the battery pack may further include: a guide tube mounted on the upper surface of the bottom plate and located between the head and the outer sidewall, the guide tube having an inlet hole, wherein the inlet hole and the exhaust hole face each other.

[0025] Furthermore, the head may further include a slot located above the exhaust hole, and the battery pack may further include a cooling unit mounted at the slot.

[0026] Furthermore, the battery pack may further include an exhaust device mounted on the outer sidewall.

[0027] A vehicle according to an aspect of the present disclosure includes the battery pack of the present disclosure.

[0028] Advantageous Effects

[0029] According to at least one embodiment of the present disclosure, the exhaust of the battery pack can be easily controlled.

[0030] According to at least one embodiment of the present disclosure, the thermal safety of the battery pack can be improved.

[0031] According to at least one embodiment of the present disclosure, the stiffness of the battery pack can be improved.

[0032] According to at least one embodiment of the present disclosure, the energy density of the battery pack can be improved. Description of the Drawings

[0033] The accompanying drawings illustrate exemplary embodiments of the present disclosure and, together with the following detailed description, are used to provide a better understanding of the technical aspects of the present disclosure. Therefore, the present disclosure should not be construed as being limited to the accompanying drawings.

[0034] Figure 1 is a perspective view showing a battery pack according to an embodiment of the present disclosure.

[0035] Figure 2 is an exploded view showing some components of the battery pack according to an embodiment of the present disclosure.

[0036] Figure 3 is a perspective view showing the side structure of the battery pack according to an embodiment of the present disclosure.

[0037] Figure 4 is a perspective view showing the side structure of the battery pack and battery cells according to an embodiment of the present disclosure.

[0038] Figure 5 is taken along line A-A' Figure 4 of the sectional view.

[0039] Figure 6 is taken along line B-B' Figure 4 of the sectional view.

[0040] Figure 7 is a view showing the side structure of the battery pack and battery cells according to an embodiment of the present disclosure when viewed from the bottom.

[0041] Figure 8 is an exploded view showing some components of the cell array structure of the battery pack according to an embodiment of the present disclosure.

[0042] Figure 9 is a view showing the cell array structure of the battery pack according to an embodiment of the present disclosure.

[0043] Figure 10 is a view showing the cell array structure of the battery pack according to an embodiment of the present disclosure when viewed from the bottom.

[0044] Figure 11 is Figure 10 an enlarged view of section C in

[0045] Figure 12 is Figure 10 an enlarged view of section D in

[0046] Figure 13 is a view showing the guide tube of the battery pack according to an embodiment of the present disclosure.

[0047] Figure 14It is a diagram showing the cell array structure and the guide tube of a battery pack according to an embodiment of the present disclosure.

[0048] Figure 15 It is a diagram showing the connection of the cell array structure and the guide tube of a battery pack according to an embodiment of the present disclosure.

[0049] Figure 16 It is a perspective view showing some components of a battery pack according to an embodiment of the present disclosure.

[0050] Figure 17 It is taken along line E-E' Figure 16 of the sectional view.

[0051] Figure 18 It is Figure 17 an enlarged view of section F in

[0052] Figure 19 It is Figure 17 an enlarged view of section G in

[0053] Figure 20 It is taken along line H-H' Figure 16 of the sectional view.

[0054] Figure 21 It is Figure 20 an enlarged view of section I in

[0055] Figure 22 It is Figure 20 an enlarged view of section J in Detailed Description of the Embodiment

[0056] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terms or words used in the specification and the appended claims should not be construed as limited to the general and dictionary meanings, but should be interpreted based on the principle that allows the inventor to appropriately define the terms for the best explanation, based on the meanings and concepts corresponding to the technical aspects of the present disclosure.

[0057] Therefore, the descriptions and the illustrations in the accompanying drawings provided herein are used to describe some exemplary embodiments of the present disclosure, but are not intended to fully describe the technical aspects of the present disclosure. Thus, it should be understood that various other equivalents and modifications may have been made thereto at the time of filing the patent application.

[0058] Figure 1 It is a perspective view showing a battery pack according to an embodiment of the present disclosure. Figure 2 It is an exploded view showing some components of a battery pack according to an embodiment of the present disclosure. Refer to Figure 1 and Figure 2, a battery pack according to an embodiment of the present disclosure may include a bottom plate 100, an outer sidewall 200, a plurality of battery cells 310, and a side structure 320.

[0059] The bottom plate 100 may have a flat plate shape. The bottom plate 100 may be generally rectangular in shape.

[0060] The outer sidewall 200 may be fastened, coupled, fixed, or attached to the upper surface of the bottom plate 100. The outer sidewall 200 and the bottom plate 100 may form an internal space.

[0061] A plurality of battery cells 310 may be received in the internal space. The plurality of battery cells 310 may be arranged to form an array. The plurality of battery cells 310 may be located on the bottom plate 100. In this case, the battery cell 310 may refer to a secondary battery. Additionally, the battery cell 310 may be a secondary battery having a cylindrical shape.

[0062] The side structure 320 may be located on the bottom plate 100. The side structure 320 may extend along one side of the bottom plate 100. The side structure 320 may keep the plurality of battery cells 310 and the bottom plate 100 separated. Alternatively, the side structure 320 may form a space between the plurality of battery cells 310 and the bottom plate 100.

[0063] With this configuration of the present disclosure, the exhaust of the battery pack can be easily controlled. When a thermal event occurs in the battery cell 310, the exhaust or combustible particles can be discharged in the downward direction or the -Z axis direction. The exhaust or combustible particles can flow through the space between the battery cell 310 and the bottom plate 100 and leave the battery pack.

[0064] Refer to Figure 1 and Figure 2 , a battery pack according to an embodiment of the present disclosure may include a bus bar assembly 400 and a battery pack cover 500. The battery pack cover 500 may cover the internal space of the battery pack. The battery pack cover 500 may have a plate shape. The battery pack cover 500 may have a shape similar to that of the bottom plate 100. The battery pack cover 500 may be fastened, coupled, fixed, or attached to the outer sidewall 200.

[0065] The bus bar assembly 400 may be located between the plurality of battery cells 310 and the battery pack cover 500. The bus bar assembly 400 may be physically connected to the tops of the plurality of battery cells 310. Additionally, the bus bar assembly 400 may be electrically connected to the plurality of battery cells 310.

[0066] An exhaust device 600 may be provided in the outer surface of the outer sidewall 200. When the pressure in the battery pack increases, the exhaust device 600 may exhaust.

[0067] Figure 3 is a perspective view showing the side structure 320 of a battery pack according to an embodiment of the present disclosure.Figure 4 FIG. 1 is a perspective view showing a side structure 320 and battery cells 310 of a battery pack according to an embodiment of the present disclosure. Figure 5 FIG. 2 is a cross-sectional view taken along line A-A'. Figure 4 Figure 6 FIG. 3 is a cross-sectional view taken along line B-B'. Figure 4 Figure 7 FIG. 4 is a view showing the side structure 320 and battery cells 310 of a battery pack according to an embodiment of the present disclosure when viewed from the bottom.

[0068] Referring to Figures 3 to 7 , the side structure 320 of a battery pack according to an embodiment of the present disclosure may include a main body 321 that extends and is configured to cover the sides of a plurality of battery cells 310. The main body 321 may extend in the X-axis direction. The main body 321 may support and accommodate an array of battery cells 310. Alternatively, the main body 321 may align a plurality of battery cells 310 to form an array of battery cells 310. The main body 321 may support and accommodate battery cells 310 on each of the left and right sides.

[0069] With this configuration of the present disclosure, a plurality of battery cells 310 can be easily aligned. Therefore, the energy density of the battery pack can be increased. In addition, the stiffness of the battery pack can be increased.

[0070] Referring to Figures 3 to 7 , the main body 321 of the side structure 320 of a battery pack according to an embodiment of the present disclosure may include a curved portion 326 along the sides of the battery cells 310. The main body 321 may include a curved portion 326 formed on the inner side. The curved portion 326 may be curved along the sides of the battery cells 310. The curved portion 326 may support the sides of the battery cells 310. The curved portion 326 may include a plurality of curved portions. The curved portion 326 and the battery cells 310 may correspond to each other in a one-to-one relationship. The curved portion 326 may be provided on each of the left and right sides of the main body 321.

[0071] With this configuration of the present disclosure, a plurality of battery cells 310 can be stably fixed and supported by the side structure 320. Therefore, the stiffness of the battery pack can be increased.

[0072] Referring to Figures 3 to 7, according to an embodiment of the present disclosure, the side structure 320 of the battery pack may include a plurality of bottom ribs 323 protruding from the main body 321 and a plurality of top ribs 324 protruding from the main body 321 and disposed above the plurality of bottom ribs 323. Additionally, a plurality of battery cells 310 may be mounted between the plurality of bottom ribs 323 and the plurality of top ribs 324. The side structure 320 may include bottom ribs 323 protruding left and right. Additionally, the side structure 320 may include top ribs 324 protruding left and right. The top ribs 324 may be positioned higher than the bottom ribs 323. The top ribs 324 and the bottom ribs 323 may correspond to each other in a one-to-one relationship. The plurality of battery cells 310 may be fixed between the bottom ribs 323 and the top ribs 324. The plurality of battery cells 310 may be spaced apart from the bottom plate 100 by the height of the bottom ribs 323.

[0073] With this configuration of the present disclosure, the plurality of battery cells 310 may be stably fixed and supported by the side structure 320. Additionally, an exhaust space may be formed below the battery cells 310.

[0074] Refer to Figures 3 to 7 , according to an embodiment of the present disclosure, the side structure 320 of the battery pack may further include a partition portion 325 protruding from the main body 321 and located between adjacent battery cells 310. The partition portion 325 may include a plurality of partitions. The partition portion 325 may protrude left and right from the main body 321 of the side structure 320.

[0075] With this configuration of the present disclosure, adjacent battery cells 310 may be spaced apart from each other by the partition portion 325. Therefore, thermal safety may be improved.

[0076] Refer to Figures 3 to 7 , according to an embodiment of the present disclosure, the side structure 320 of the battery pack may have a head portion 322 and an exhaust hole 328. The head portion 322 may be formed at both ends of the main body 321. The head portion 322 may be provided at each of the front side and the rear side of the main body 321. The head portion 322 may cover the plurality of battery cells 310.

[0077] The exhaust hole 328 may be formed in the head portion 322. The exhaust hole 328 may be formed in each of the front head portion 322 and the rear head portion 322. The exhaust hole 328 may communicate with the gap between the plurality of battery cells 310 and the bottom plate 100.

[0078] With this configuration of the present disclosure, the exhaust of the battery pack may be easily controlled. When a thermal event occurs in the battery cells 310, the exhaust or combustible particles may be discharged in the downward direction or the -Z axis direction. The exhaust or combustible particles may flow through the space between the battery cells 310 and the bottom plate 100 and leave the battery pack through the exhaust hole 328.

[0079] Refer toFigures 3 to 7 According to an embodiment of the present disclosure, the exhaust hole 328 of the side structure 320 of the battery pack can be opened downward. Additionally, the exhaust hole 328 can be opened to the right.

[0080] With this configuration of the present disclosure, the exhaust of the battery pack can be easily controlled. Since the exhaust hole 328 is opened downward, the resistance to the flow of exhaust or combustible particles from the battery cells 310 can be reduced. Therefore, the thermal safety of the battery pack can be improved.

[0081] Figure 8 is an exploded view showing some components of the cell array structure 300 of a battery pack according to an embodiment of the present disclosure. Figure 9 is a view showing the cell array structure 300 of a battery pack according to an embodiment of the present disclosure. Figure 10 is a view showing the cell array structure 300 of a battery pack according to an embodiment of the present disclosure when viewed from the bottom. Figure 11 is Figure 10 an enlarged view of cross-section C. Refer to Figures 8 to 11 According to an embodiment of the present invention, the battery pack may include a cell array structure 300. The cell array structure 300 may include a pair of inner sidewalls 330, a plurality of side structures 320, a plurality of cooling units 340, and a plurality of battery cells 310.

[0082] At least some of the plurality of battery cells 310 may be mounted, coupled, or fixed to the inner sidewalls 330. The inner sidewalls 330 may include wall heads at both ends in the X-axis direction. The wall heads may have slots. Additionally, the head 322 of the side structure 320 may have a slot 327. The slot 327 may pass through the head 322. Additionally, the slot 327 may be located above the exhaust hole 328.

[0083] The inner sidewalls 330 may be fastened, coupled, fixed, or attached to the upper surface of the bottom plate 100. The inner sidewalls 330 may be located between the plurality of battery cells 310 and the outer sidewalls 200.

[0084] The side structures 320 may extend in the X-axis direction. The side structures 320 may fix and support the plurality of battery cells 310. The side structures 320 may include a plurality of side structures.

[0085] The cooling units 340 may extend in the X-axis direction. The cooling units 340 may contact the plurality of battery cells 310. The cooling units 340 may include a plurality of cooling units. The cooling units 340 may be inserted, coupled, mounted, or fixed to the slot 327. A cooling liquid or a cooling gas may flow through the cooling units 340.

[0086] The side structure 320, the plurality of battery cells 310, and the cooling unit 340 may be arranged in an alternating manner. A pair of inner sidewalls 330 may be provided on the outermost sides of the cell array structure 300.

[0087] The cell array structure 300 may be filled with resin. The resin may couple, fix, or attach the components of the cell array structure 300. Additionally, the resin may increase the stiffness of the cell array structure 300.

[0088] With this configuration of the present disclosure, the cooling efficiency of the battery pack can be improved. The cooling unit 340 may contact all the battery cells 310. Thus, the thermal safety of the battery pack can be improved.

[0089] Figure 12 Yes Figure 10 is an enlarged view of cross-section D in. Refer to Figures 10 to 12 , the exhaust gas (g) from the battery cell 310 of the battery pack according to an embodiment of the present disclosure may flow through the space between the battery cell 310 and the bottom plate 100 in the +X-axis direction and the -X-axis direction. Additionally, the exhaust gas may flow through the exhaust holes 328 in the +X-axis direction and the -X-axis direction.

[0090] Figure 13 is a view showing the guide tube 700 of the battery pack according to an embodiment of the present disclosure. Figure 14 is a view showing the cell array structure 300 and the guide tube 700 of the battery pack according to an embodiment of the present disclosure. Figure 15 is a view showing the connection of the cell array structure 300 and the guide tube 700 of the battery pack according to an embodiment of the present disclosure. Figure 16 is a perspective view showing some components of the battery pack according to an embodiment of the present disclosure. Figure 17 is taken along line E-E' Figure 16 of the cross-sectional view. Figure 18 is Figure 17 is an enlarged view of cross-section F in.

[0091] See Figures 13 to 18 , the battery pack according to an embodiment of the present invention may include a guide tube 700.

[0092] The guide tube 700 may extend in the Y-axis direction. The guide tube 700 may be mounted on the upper surface of the bottom plate 100. The guide tube 700 may be located between the head 322 and the outer sidewall 200.

[0093] The guide tube 700 may have an inlet hole 701 formed in the -X-axis direction. The inlet hole 701 and the exhaust hole 328 may face each other. Additionally, the guide tube 700 may be open in the +Y-axis direction and the -Y-axis direction.

[0094] The guide pipe 700 can be located below the cooling unit 340. The guide pipe 700 can be disposed between the bottom plate 100 and the cooling unit 340.

[0095] The exhaust gas (g) discharged in the +X-axis direction through the exhaust hole 328 can enter the guide pipe 700 through the inlet hole 701. The exhaust gas (g) entering the guide pipe 700 can flow in the +Y-axis direction and the -Y-axis direction along the flow channel 702 in the guide pipe 700.

[0096] With this configuration of the present disclosure, the exhaust of the battery pack can be easily controlled. The exhaust gas or combustible particles can flow through the space between the battery cells 310 and the bottom plate 100, and leave the battery pack through the exhaust hole 328 and the guide pipe 700.

[0097] Referring to Figure 18 According to an embodiment of the present disclosure, the battery pack may further include an exhaust device 600 mounted at the outer sidewall 200. The exhaust device 600 can be mounted on the side of the battery pack. The exhaust device 600 can include a plurality of exhaust devices. Additionally, the exhaust device 600 can be disposed in the +Y-axis direction and the -Y-axis direction of the battery pack. When the pressure in the battery pack increases, the exhaust device 600 can communicate the inside and the outside of the battery pack with each other. The exhaust gas (g) flowing out from the guide pipe 700 can flow along the outer sidewall 200. Additionally, the exhaust gas (g) can leave the battery pack through the exhaust device 600.

[0098] With this configuration of the present disclosure, the exhaust of the battery pack can be easily controlled. The exhaust gas or combustible particles can leave the battery pack through the exhaust device 600.

[0099] Figure 19 is Figure 17 an enlarged view of cross-section G in Figure 19 According to an embodiment of the present disclosure, the exhaust device 600 can be mounted at the rear side of the battery pack. The exhaust device 600 can include a plurality of exhaust devices. Additionally, the exhaust device 600 can be disposed in the +X-axis direction and the -X-axis direction of the battery pack. When the pressure in the battery pack increases, the exhaust device 600 can communicate the inside and the outside of the battery pack with each other. The exhaust gas (g) discharged in the -X-axis direction or the backward direction through the exhaust hole 328 can flow along the outer sidewall 200. Additionally, the exhaust gas (g) can leave the battery pack through the exhaust device 600.

[0100] With this configuration of the present disclosure, the exhaust of the battery pack can be easily controlled. The exhaust gas or combustible particles can leave the battery pack through the exhaust device 600.

[0101] Figure 20 is a cross-sectional view taken along line H-H’ of Figure 16 Figure 21 is Figure 20 ​An enlarged view of cross-section I in Figure 22 is Figure 20 an enlarged view of cross-section J in. Refer to Figures 20 to 22 , according to an embodiment of the present disclosure, the height of the vent hole 328 of the battery pack may be lower than the height of the bottom rib 323. Since the height of the vent hole 328 is lower than the height of the bottom rib 323, the head 322 can cover the side surface of the battery cell 310 to the lower end. Therefore, the battery cell 310 can be prevented from being exposed through the vent hole 328.

[0102] With this configuration of the present disclosure, the side structure 320 can prevent or avoid the leakage of flames generated from the battery cell 310. Therefore, the thermal safety of the battery pack can be improved.

[0103] A vehicle according to the present disclosure may include the above battery pack according to the present disclosure. The battery pack according to the present disclosure can be used for vehicle applications, such as electric vehicles or hybrid electric vehicles. In addition, in addition to the battery pack, the vehicle according to the present disclosure may further include various other components included in the vehicle. For example, the vehicle according to the present disclosure may further include a body, a motor, a controller, such as an electronic control unit (ECU), etc.

[0104] For ease of description, terms indicating directions such as up, down, left, right, front, back, inside, and outside are used, but it will be apparent to those skilled in the art that these terms may change depending on the position of the element or the observer.

[0105] Although the present disclosure has been described above through a limited number of embodiments and drawings, the present disclosure is not limited thereto, and it will be apparent to those skilled in the art that various changes and modifications can be made to it in the technical aspects of the present disclosure and the appended claims and their equivalents.

Claims

1. A battery pack, comprising: Base plate; an outer side wall connected to an upper surface of the bottom plate; A plurality of battery cells, the plurality of battery cells are located on the bottom plate and form an array; as well as A side structure is located on the bottom plate, extends along one side of the bottom plate, and is configured to keep the plurality of battery cells spaced apart from the bottom plate.

2. The battery pack according to claim 1, in, The side structure includes a body extending and configured to cover sides of the plurality of battery cells.

3. The battery pack according to claim 2, in, The body includes a bent portion formed along a side of the battery cell.

4. The battery pack according to claim 2, wherein: The side structure also includes: a plurality of bottom ribs protruding from the body; and a plurality of top ribs protruding from the body and positioned above the plurality of bottom ribs, and Wherein, the plurality of battery cells are installed between the plurality of bottom ribs and the plurality of top ribs.

5. The battery pack according to claim 4, in, The side structure also includes a partition protruding from the main body and located between adjacent battery cells among the plurality of battery cells.

6. The battery pack according to claim 4, in, The side structure comprises: a head portion formed at an end portion of the body and configured to cover the plurality of battery cells; and An exhaust hole is formed at the head portion and communicates with a gap between the plurality of battery cells and the bottom plate.

7. The battery pack according to claim 6, The exhaust hole opens downward.

8. The battery pack according to claim 6, The height of the exhaust hole is lower than that of the bottom rib.

9. The battery pack according to claim 6, further comprising: A guide pipe is installed at the upper surface of the bottom plate and is located between the head and the outer side wall, the guide pipe having an inlet hole, wherein the inlet hole and the exhaust hole face each other.

10. The battery pack according to claim 6, in, The head also includes a slot located above the exhaust hole, and Wherein, the battery pack further includes a cooling unit installed at the narrow slot.

11. The battery pack according to claim 1, further comprising: An exhaust device is installed at the outer side wall.

12. A vehicle comprising the battery pack according to any one of claims 1 to 11.

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