Battery pack

Abstract

A battery pack is disclosed. A battery pack according to one embodiment of the present invention may comprise: a substrate; the battery cell is arranged on the substrate; a sidewall mounted on the substrate and having a vent hole positioned higher than the battery cell; and the exhaust device is arranged in the exhaust hole.

Description

Technical Field

[0001] This disclosure relates to a battery pack.

[0002] This application claims priority to Korean Patent Application No. 10-2024-0110786, filed in Korea on August 19, 2024, the disclosure of which is incorporated herein by reference. Background Technology

[0003] With the significant increase in demand for portable electronic products such as smartphones, tablet PCs, and smartwatches, and the growing prevalence of electric vehicles, research is actively underway on batteries installed in these vehicles, especially secondary batteries that allow for repeated charging and discharging.

[0004] Currently, commercially available rechargeable batteries include nickel-cadmium batteries, nickel-metal hydride batteries, nickel-zinc batteries, and lithium rechargeable batteries. Among them, lithium rechargeable batteries have a small or no memory effect, so they have received more attention than nickel-based rechargeable batteries because their advantages are that they can be recharged regardless of convenience, have a very low self-discharge rate, and have high energy density.

[0005] Lithium-ion secondary batteries mainly consist of lithium-based oxides and carbon materials used as positive and negative electrode active materials, respectively. A lithium-ion secondary battery includes: an electrode assembly comprising a positive electrode plate and a negative electrode plate coated with positive and negative electrode active materials, respectively, with a separator between the positive and negative electrode plates; and a sealed package or battery casing that houses the electrode assembly together with the electrolyte solution.

[0006] Generally, based on the shape of the battery casing, lithium secondary batteries can be classified into can-type secondary batteries in which the electrode components are housed in a metal can and bag-type secondary batteries in which the electrode components are housed in a bag of aluminum laminates.

[0007] Recently, rechargeable batteries have been widely used in medium and large devices such as electric vehicles and energy storage systems (ESS) for driving and storing energy, as well as in small devices such as portable electronic devices. Multiple rechargeable batteries can be electrically connected and stored within a module housing to form a battery module. Each rechargeable battery included in a battery module can then be referred to as a battery cell. Furthermore, multiple battery modules can be connected to each other to form a battery pack.

[0008] However, when a battery pack comprises multiple battery modules, and each battery module contains multiple battery cells, it may be susceptible to thermal cascading effects between battery modules or battery cells. For example, when an event such as thermal runaway occurs within a single battery module, the propagation of thermal runaway to other battery modules or other battery cells must be prevented. If the propagation of thermal runaway between battery modules or battery cells is not properly suppressed, an event occurring in a particular battery module or battery cell may lead to a cascading thermal reaction in other battery modules or other battery cells, potentially causing an explosion or fire or increasing the scale of an explosion or fire.

[0009] Specifically, when an event such as thermal runaway occurs in a single battery module, gases or flames may be randomly emitted to the outside. If the emission of gases or flames is not properly controlled, they may be emitted toward other battery modules, potentially causing a thermal cascade in those modules. In particular, module terminals may be located on the front side of the battery module, and components such as module busbars for electrical connection to other battery modules or battery packs may be present. Therefore, if a flame is emitted to the front side of a battery module, the module terminals may be damaged, potentially causing an electrical short circuit within the battery pack. Furthermore, since other battery modules may be located on the front side of a particular battery module, if a flame is emitted to the front side of that module, the emitted flame may be directed to other battery modules, easily leading to the spread of a fire between battery modules.

[0010] If heat transfer between battery modules or battery cells is not properly controlled, a sudden voltage drop may occur within the battery module or battery pack. This could cause the device containing the battery module or battery pack to shut down abruptly, resulting in unexpected damage. For example, if a sudden voltage drop occurs in the battery pack while an electric vehicle is being operated, there may not be enough time to move the vehicle to a safe location.

[0011] Furthermore, if heat transfer between battery modules or battery cells is not properly controlled, potentially causing a sudden fire or explosion, the risk of injury or death to users is high. For example, in the event of thermal runaway in an electric vehicle, occupants may not be able to escape safely if sufficient time is not allowed before it escalates into a full-blown fire. Summary of the Invention

[0012] Technical issues

[0013] Therefore, this disclosure was designed to solve the problems of the related technology, and this disclosure aims to provide a battery pack with an improved structure to properly control the emission of flames and the like generated inside the battery module, and a vehicle including the battery pack.

[0014] Furthermore, this disclosure aims to provide a structure capable of rapidly discharging exhaust gases in the event of a thermal event.

[0015] Furthermore, this disclosure aims to provide a structure that can stably maintain the opening and closing function of the exhaust device in the event of a thermal event.

[0016] Furthermore, this disclosure aims to provide a structure that can ensure exhaust space in the event of a thermal event.

[0017] Furthermore, this disclosure aims to provide a structure capable of guiding the flow of exhaust gas in the event of a thermal event.

[0018] However, the technical problems to be solved by this disclosure are not limited to those described above, and those skilled in the art will clearly understand other problems not mentioned herein based on the following description.

[0019] Technical solution

[0020] In one aspect of this disclosure, a battery pack is provided, the battery pack comprising: a substrate; battery cells disposed on the substrate; a sidewall mounted on the substrate and having an exhaust port positioned above the battery cells; and an exhaust device disposed in the exhaust port.

[0021] In addition, the sidewall may include: a first portion connected to the substrate; and a second portion extending inward from the first portion and inclined relative to the substrate, wherein the vent hole may be disposed in the second portion.

[0022] In addition, the battery pack may also include a battery pack cover, which is coupled to the second part and configured to cover the battery cells.

[0023] Furthermore, the angle between the second portion and the substrate can be 45 degrees or greater.

[0024] In addition, the battery pack may also include an exhaust guide that is coupled to the outer surface of the second portion and configured to cover the exhaust port.

[0025] In addition, the exhaust guide may include a guide portion configured to cover the exhaust port at an angle.

[0026] Furthermore, the angle formed by the inclined surface of the guide portion and the second portion can be 45 degrees or less.

[0027] Furthermore, the exhaust guide may have an exhaust port formed along the inclined direction of the second portion.

[0028] In addition, the exhaust device can be positioned above the battery cell.

[0029] In addition, the battery pack may also include a module housing mounted on the substrate and configured to house the battery cells, and at least one of the vent, the venting device, and the second portion may be positioned above the module housing.

[0030] In addition, the battery pack may also include a battery management system mounted on the substrate and electrically connected to the battery cells, and at least one of the vent, the venting device, and the second part may be positioned above the battery management system.

[0031] Furthermore, the battery pack may also include a partition wall mounted on the substrate, and at least one of the vent, the venting device, and the second portion may be positioned above the partition wall.

[0032] In another aspect of this disclosure, a vehicle is also provided, which includes a battery pack according to this disclosure.

[0033] Beneficial effects

[0034] According to at least one embodiment of this disclosure, when gas or flame is generated inside the battery module, the emission of gas or flame can be appropriately controlled.

[0035] According to at least one embodiment of this disclosure, exhaust gases can be rapidly released when a thermal event occurs.

[0036] According to at least one embodiment of this disclosure, the opening and closing functions of the exhaust device can be stably maintained when a thermal event occurs.

[0037] According to at least one embodiment of this disclosure, exhaust space can be ensured in the event of a thermal event.

[0038] According to at least one embodiment of this disclosure, the flow of exhaust gas can be guided when a thermal event occurs.

[0039] According to at least one embodiment of this disclosure, the electrical safety of the battery pack can be improved.

[0040] According to at least one embodiment of this disclosure, a battery pack explosion can be prevented in the event of a thermal event. Attached Figure Description

[0041] The accompanying drawings illustrate preferred embodiments of the present disclosure and, together with the foregoing disclosure, serve to provide a further understanding of the technical features of the present disclosure; therefore, the present disclosure is not to be construed as limited to the drawings.

[0042] Figure 1 This is a diagram illustrating a battery pack according to an embodiment of the present disclosure.

[0043] Figure 2 It is shown Figure 1 An exploded view of some components of the battery pack.

[0044] Figure 3 It is shown Figure 2 An exploded view of some components of the battery pack.

[0045] Figure 4 It is shown Figure 2 An exploded view of some components of the battery pack.

[0046] Figure 5 It is shown Figure 4 An exploded view of the exhaust system.

[0047] Figure 6 It is along Figure 4 The sectional view taken by the cutting line E-E'.

[0048] Figure 7 It is shown Figure 3 A diagram of the battery module.

[0049] Figure 8 It is shown Figure 7 An exploded view of the battery module.

[0050] Figure 9 Is it along this Figure 1 The sectional view taken by the cutting line A-A'.

[0051] Figure 10 It is shown Figure 9 The diagram shows the modified implementation method.

[0052] Figure 11 and Figure 12 This shows what happens when a thermal event occurs. Figure 9 A diagram showing the changes that occur within.

[0053] Figure 13 This is a diagram showing the emission of gases when a thermal event occurs. Detailed Implementation

[0054] The preferred embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. Before the description, it should be understood that the terminology used in the specification and appended claims should not be construed as limited to its general and dictionary meaning, but should be interpreted according to the meaning and concept corresponding to the technical aspects of this disclosure, based on the principle that inventors are allowed to appropriately define terms for best interpretation.

[0055] Therefore, the description presented herein is merely a preferred example for illustrative purposes and is not intended to limit the scope of this disclosure. It should be understood that other equivalents and modifications may be made thereto without departing from the scope of this disclosure.

[0056] Figure 1 This is a diagram showing a battery pack 1000 according to an embodiment of the present disclosure. Figure 2 It is shown Figure 1 Exploded view of some components of the 1000 battery pack. Figure 3 It is shown Figure 2 Exploded view of some components of the 1000 battery pack. Figure 4 It is shown Figure 2 Exploded view of some components of the 1000 battery pack.

[0057] refer to Figures 1 to 4 The battery pack 1000 according to embodiments of the present disclosure may include a housing 100. The housing 100 may form the appearance of the battery pack 1000. The housing 100 may have a cuboid shape. The housing 100 may provide space therein. The housing 100 may include a substrate 110. The substrate 110 may have a square shape. The substrate 110 may have a flat shape. The substrate 110 may form the appearance of the battery pack 1000. The substrate 110 may provide internal space for the battery pack 1000.

[0058] The battery cell 220 may be located inside the housing 100. The battery cell 220 may be arranged on the substrate 110. The battery cell 220 may refer to a secondary battery. In particular, the battery cell 220 may be a pouch-type secondary battery. However, the shape of the battery cell 220 is not limited to a pouch shape, and the battery cell 220 may have various shapes, such as a cylindrical shape or a cuboid shape. Multiple battery cells 220 may be provided.

[0059] The housing 100 may include a first sidewall 120. The first sidewall 120 may be disposed, fastened, coupled, secured, or attached to the upper surface of the substrate 110. The first sidewall 120 may form the appearance of the battery pack 1000. The first sidewall 120 may provide internal space.

[0060] The first sidewall 120 may have a vent 122a. The vent 122a may be positioned above the battery cell 220. Multiple vents 122a may be provided.

[0061] The battery pack 1000 may include a venting device 500. The venting device 500 may be mounted on the first sidewall 120. The venting device 500 may be installed in a vent hole 122a. For example, the venting device 500 may be a valve. For example, the venting device 500 may be a vent plug 500a. When the pressure inside the housing 100 increases, the venting device 500 may open to release gas. Furthermore, the venting device 500 may prevent external air from flowing into the housing 100. Multiple venting devices 500 may be provided. Multiple venting devices 500 may be arranged in a one-to-one correspondence with multiple vent holes 122a.

[0062] In the event of a thermal event, the high-temperature exhaust gas G emitted from battery cell 220 can move upwards. Since the exhaust port 122a is positioned above battery cell 220, the exhaust gas G can be discharged to the outside of battery pack 1000 through exhaust device 500 without being blocked by battery cell 220.

[0063] refer to Figures 1 to 4 The first sidewall 120 may include a first portion 121. The first portion 121 may be coupled to the substrate 110. The first portion 121 may be fastened, coupled, attached, or fixed to the upper surface of the substrate 110. The first portion 121 may extend in the vertical direction.

[0064] The first sidewall 120 may include a second portion 122. The second portion 122 may extend inwardly from the first portion 121. The second portion 122 may be inclined relative to the substrate 110. The first portion 121 and the second portion 122 may be integrally formed. The second portion 122 may be bent rearward from the first portion 121 or along the -X-axis direction. The second portion 122 may be inclined relative to the first portion 121.

[0065] The vent 122a can be arranged in the second part 122. The venting device 500 can be installed in the second part 122.

[0066] In the event of a thermal event, exhaust gas G and particulate matter P can be emitted from battery cell 220. Particulate matter P can be substances such as electrode components or electrolyte inside battery cell 220. Particulate matter P can move along with exhaust gas G. When exhaust gas G is emitted through exhaust device 500, particulate matter P can also be emitted through exhaust device 500 or collide with exhaust device 500. Since the second part 122 is inclined relative to substrate 110, particulate matter P will not accumulate on exhaust device 500, but will fall downwards or along the -Z axis due to gravity. Since particulate matter P will not accumulate on exhaust device 500, blockage of exhaust port 122a can be prevented. Since particulate matter P will not accumulate on exhaust device 500, the opening and closing function of exhaust device 500 can be stably maintained.

[0067] refer to Figures 1 to 4 The housing 100 may include a second sidewall 120a. The second sidewall 120a may be mounted, fastened, connected, secured, or attached to the upper surface of the substrate 110. The second sidewall 120a may form the appearance of the battery pack 1000. The second sidewall 120a may provide internal space. A pair of second sidewalls 120a may be provided. The second sidewall 120a may be mounted, fastened, connected, secured, or attached to the first sidewall 120.

[0068] The battery pack 1000 may include a third sidewall 120b. The third sidewall 120b may be mounted, fastened, connected, fixed, or attached to the upper surface of the substrate 110. The third sidewall 120b may form the appearance of the battery pack 1000. The third sidewall 120b may provide internal space. The third sidewall 120b may be mounted, fastened, connected, fixed, or attached to the second sidewall 120a.

[0069] refer to Figures 1 to 4 The housing 100 may include a battery pack cover 150. The battery pack cover 150 may have a square plate shape. The battery pack cover 150 may form the appearance of the battery pack 1000. The battery pack cover 150 may be mounted, fastened, connected, secured, or attached to a first sidewall 120. The battery pack cover 150 may be mounted, fastened, connected, secured, or attached to a second portion 122. The battery pack cover 150 may be mounted, fastened, connected, secured, or attached to a second sidewall 120a. The battery pack cover 150 may be mounted, fastened, connected, secured, or attached to a third sidewall 120b. The battery pack cover 150 may cover the internal space of the battery pack 1000. The battery pack cover 150 may be located on the battery cell 220.

[0070] refer to Figures 1 to 4 The exhaust guide 400 can be installed, fastened, connected, fixed, or attached to the housing 100. The exhaust guide 400 can be installed, fastened, connected, fixed, or attached to the first sidewall 120. The exhaust guide 400 can be installed, fastened, connected, fixed, or attached to the second portion 122. The exhaust guide 400 can cover the exhaust port 122a. The exhaust guide 400 can cover the exhaust device 500. The exhaust guide 400 can guide the discharge direction of the exhaust gas G. The exhaust guide 400 can guide the discharge direction of the exhaust gas G downwards or in the -Z axis direction. The exhaust guide 400 can guide the discharge direction of the exhaust gas G such that the angle formed by the discharge direction of the exhaust gas G with the substrate 110 and the angle formed by the second portion 122 and the substrate 110 are consistent.

[0071] If the battery pack 1000 is installed in the vehicle, the base plate 110 can be positioned facing the ground. In this case, the exhaust gas G can be discharged towards the ground through the exhaust guide 400. The exhaust gas G can be directed away from the flow of occupants. This can improve occupant safety.

[0072] refer to Figures 1 to 4 The battery pack 1000 may include partition walls 300. Partition walls 300 may include a first partition wall 310 and a second partition wall 320. Multiple partition walls 300 may be provided. Partition walls 300 may be mounted, fastened, fixed, connected, or attached to the upper surface of the substrate 110. Partition walls 300 may divide the internal space of the battery pack 1000. The first partition wall 310 and the second partition wall 320 may have the same height.

[0073] The battery pack 1000 may include a battery management system (BMS) 600. The battery management system 600 may be mounted, secured, fixed, connected to, or attached to the upper surface of the substrate 110. The battery management system 600 may be electrically connected to the battery cells 220 or the battery module 200. The battery management system 600 may control the charging and discharging of the battery cells 220 or the battery module 200. The battery management system 600 may monitor the status of the battery cells 220 or the battery module 200.

[0074] Figure 5 It is shown Figure 4 Exploded view of the exhaust device 500. Figure 6 It is along Figure 4 The sectional view taken by the cutting line E-E'.

[0075] refer to Figure 5 and Figure 6 The exhaust device 500 may include a mounting portion 510. The mounting portion 510 may be installed in the exhaust port 122a. For example, the mounting portion 510 may have threads on its outer peripheral surface, and the threads of the mounting portion 510 may be configured to engage with the threads of the exhaust port 122a. A valve port 511 may be formed in the mounting portion 510.

[0076] The exhaust device 500 may include a valve cover 520. The valve cover 520 may move toward or away from the exhaust port 122a. The valve cover 520 may open or close the valve port 511. When moving away from the exhaust port 122a, the valve cover 520 may open the valve port 511. Conversely, when moving toward the exhaust port 122a, the valve cover 520 may close the valve port 511.

[0077] The venting device 500 may include a spring 550. The spring 550 can provide a restoring force to the valve cover 520 in the direction that the valve cover 520 approaches the vent port 122a. The spring 550 can be compressed when the valve cover 520 moves away from the vent port 122a. The spring 550 can return to its original position when the valve cover 520 moves toward the vent port 122a.

[0078] The exhaust device 500 may include a support member 530. The support member 530 may be connected to the inside of the mounting portion 510. The support member 530 may include a second connecting hole 531. The valve cover 520 may include a first connecting hole 521.

[0079] The exhaust device 500 may include a connecting rod 540. The connecting rod 540 may pass through a first connecting hole 521 and a second connecting hole 531. The connecting rod 540 may include a first stop 541 on one side. The connecting rod 540 may include a second stop 542 on the other side.

[0080] Spring 550 may be located between the first stop 541 and valve cover 520. Valve cover 520 and support 530 may be located between spring 550 and second stop 542.

[0081] Figure 7 It is shown Figure 3 The diagram shows the battery module 200. Figure 8 It is shown Figure 7 Exploded view of battery module 200. (Reference) Figure 7 and Figure 8 The battery module 200 can be positioned inside the housing 100. The battery module 200 can have a top plate 210a facing the battery pack cover 150. The battery module 200 can have a cuboid shape. The battery module 200 can be located in a space separated by partition walls 300.

[0082] Battery module 200 may include module housing 210. Module housing 210 may also be referred to as frame 210. Module housing 210 may include a top plate 210a and a lower frame 210b. Module housing 210 may provide space therein. Lower frame 210b may include a base plate and a pair of side plates. Top plate 210a may be mounted, fastened, coupled, fixed, or attached to the pair of side plates. For example, top plate 210a may be welded to lower frame 210b. Module housing 210 may have openings on the left and right sides. Top plate 210a may include a top hole 211. Top hole 211 communicates the interior and exterior of module housing 210. In the event of a thermal event in battery module 200, exhaust gases G and combustible particles P may be discharged to the exterior of module housing 210 through top hole 211.

[0083] Battery module 200 may include battery cells 220. Battery cells 220 may be housed within module housing 210. Multiple battery cells 220 may be stacked along a front-to-back direction or an X-axis direction. Battery cell 220 may include a receiving portion 221 with electrode assemblies, a first sealing portion 222 protruding to the left and right sides of the receiving portion 221, and a second sealing portion 223 protruding upward from the receiving portion 221. Furthermore, battery cell 220 may include electrode leads 224 protruding to the left and right sides of the first sealing portion 222, respectively. Each battery cell 220 may extend along a left-to-right direction or an Y-axis direction. Electrode leads 224 may protrude to the left and right sides of each receiving portion 221.

[0084] The pad 250 can be disposed between multiple battery cells 220. The pad 250 can be arranged between at least some of the battery cells 220 and / or on the periphery of the stack. For example, the pad 250 can be configured to be disposed between every four stacked battery cells 220.

[0085] The pad 250 may contain an elastic material to absorb the expansion of the battery cell 220. For example, the pad 250 may contain a foam material such as polyurethane. Alternatively, the pad 250 may contain a material that can block heat or flame. For example, the pad 250 may contain a heat-insulating or flame-retardant material such as silicone or mica.

[0086] The busbar frame assembly 230 can be disposed on the left and right sides of the plurality of battery cells 220 respectively. The busbar frame assembly 230 can be electrically connected to the electrode leads 224 of the plurality of battery cells 220. The busbar frame assembly 230 may include an output terminal 231.

[0087] A pair of end caps 240 can be attached to the left and right sides of the module housing 210, respectively. The pair of end caps 240 can cover the left and right sides of the module housing 210. The end caps 240 can have a square shape.

[0088] The inner cover 260 can be positioned between the top plate 210a and the plurality of battery cells 220. The inner cover 260 can be mounted, fastened, fixed, coupled, or attached to the inner surface of the top plate 210a. The inner cover 260 can cover the top opening 211. In the event of a thermal event from the battery cells 220, the inner cover 260 can rupture via vent gas G or flammable particles P. The vent gas G can be discharged to the outside of the module housing 210 through the top opening 211. The inner cover 260 can prevent vent gas G generated from the outside of the battery module 200 from flowing into the module housing 210.

[0089] Figure 9 It is along Figure 1 The sectional view taken along section line A-A'. (Reference) Figure 9The height H1 of the second part 122 can be greater than or equal to the height H3 of the battery cell 220. In the event of a thermal event, the high-temperature exhaust gas G emitted from the battery cell 220 can move upwards. Because the second part 122 is positioned above the battery cell 220, the exhaust gas G can be discharged to the outside of the battery pack 1000 through the exhaust device 500 without being blocked by the battery cell 220.

[0090] The height H1 of the second part 122 can be higher than the height H4 of the battery module 200. Since the second part 122 is positioned higher than the battery module 200, the exhaust gas G can be discharged to the outside of the battery pack 1000 through the exhaust device 500 without being blocked by the battery module 200.

[0091] The height H1 of the second part 122 can be higher than the height H5 of the battery management system 600. Since the second part 122 is positioned higher than the battery management system 600, the exhaust gas G can be discharged to the outside of the battery pack 1000 through the exhaust device 500 without being blocked by the battery management system 600.

[0092] The height H1 of the second part 122 can be higher than or equal to the height H6 of the first partition wall 310. Since the second part 122 is positioned higher than the first partition wall 310, the exhaust gas G can be discharged to the outside of the battery pack 1000 through the exhaust device 500 without being blocked by the first partition wall 310.

[0093] The height H2 of the vent 122a can be higher than or equal to the height H3 of the battery cell 220. Since the vent 122a is positioned higher than the battery cell 220, the exhaust gas G can be discharged to the outside of the battery pack 1000 through the venting device 500 without being blocked by the battery cell 220.

[0094] The height H2 of the vent 122a can be higher than or equal to the height H4 of the battery module 200. Since the vent 122a is positioned higher than the battery module 200, the exhaust gas G can be discharged to the outside of the battery pack 1000 through the exhaust device 500 without being blocked by the battery module 200.

[0095] The height H2 of the vent 122a can be higher than or equal to the height H5 of the battery management system 600. Since the vent 122a is positioned higher than the battery management system 600, the exhaust gas G can be discharged to the outside of the battery pack 1000 through the venting device 500 without being blocked by the battery management system 600.

[0096] The height H2 of the vent 122a can be higher than or equal to the height H6 of the first partition wall 310. Since the vent 122a is positioned higher than the first partition wall 310, the exhaust gas G can be discharged to the outside of the battery pack 1000 through the exhaust device 500 without being blocked by the first partition wall 310.

[0097] The height H2 of the exhaust device 500 can be higher than or equal to the height H3 of the battery cell 220. Since the exhaust device 500 is positioned higher than the battery cell 220, the exhaust gas G can be discharged to the outside of the battery pack 1000 through the exhaust device 500 without being blocked by the battery cell 220.

[0098] The height H2 of the exhaust device 500 can be higher than or equal to the height H4 of the battery module 200. Since the exhaust device 500 is positioned higher than the battery module 200, the exhaust gas G can be discharged to the outside of the battery pack 1000 through the exhaust device 500 without being blocked by the battery module 200.

[0099] The height H2 of the exhaust device 500 can be higher than or equal to the height H5 of the battery management system 600. Since the exhaust device 500 is positioned higher than the battery management system 600, the exhaust gas G can be discharged to the outside of the battery pack 1000 through the exhaust device 500 without being blocked by the battery management system 600.

[0100] The height H2 of the exhaust device 500 can be higher than or equal to the height H6 of the first partition wall 310. Since the exhaust device 500 is positioned higher than the first partition wall 310, the exhaust gas G can be discharged to the outside of the battery pack 1000 through the exhaust device 500 without being blocked by the first partition wall 310.

[0101] refer to Figure 9 The second part 122 and the substrate 110 can form an included angle B. For example, the included angle B can be 45 degrees or greater. By forming an included angle B between the second part 122 and the substrate 110, particles P will not accumulate on the exhaust device 500, but will fall downwards or along the -Z axis due to gravity. By preventing particles P from accumulating on the exhaust device 500, the exhaust port 122a can be prevented from becoming blocked. By preventing particles P from accumulating on the exhaust device 500, the opening and closing functions of the exhaust device 500 can be stably maintained.

[0102] refer to Figure 9 The exhaust guide 400 may have an exhaust port 401. The exhaust port 401 may be formed along the inclined direction SD of the second portion 122. The exhaust gas G discharged through the exhaust port 401 may be discharged along the inclined direction SD. The angle formed between the exhaust gas G discharged through the exhaust port 401 and the substrate 110 may be the same as the angle between the second portion 122 and the substrate 110.

[0103] If the battery pack 1000 is installed in a vehicle, the base plate 110 can be positioned facing the ground. In this case, the exhaust gas G can flow downwards along the inclined direction SD through the exhaust guide 400. The exhaust gas G can flow away from the occupants. This improves occupant safety.

[0104] The exhaust guide 400 may include a guide portion 410. The guide portion 410 may obliquely cover the exhaust port 122a. The guide portion 410 may obliquely cover the second portion 122. The guide portion 410 may guide the exhaust gas G toward the exhaust port 401. Due to the guide portion 410, the exhaust gas G will not flow back into the battery pack 1000.

[0105] The inclined surface of the guide portion 410 and the vent 122a can form an angle D. The inclined surfaces of the guide portion 410 and the second portion 122 can form an angle D. For example, the angle D can be 45 degrees or less. If the angle D is greater than 45 degrees, the discharged exhaust gas G can flow into the battery pack 1000. By forming the angle D to be less than or equal to 45 degrees, the backflow of the exhaust gas G can be prevented.

[0106] Figure 10 It is shown Figure 9 A diagram illustrating the modified implementation method. (Refer to...) Figure 10 The venting device 500 may be a vent plug 500a. The venting device 500 may include a membrane 510a. If the internal pressure of the battery pack 1000 increases, the membrane 510a may rupture. If the membrane 510a ruptures, the vent 122a may open.

[0107] Figure 11 and Figure 12 This shows what happens when a thermal event occurs. Figure 9 A diagram showing the changes that occur within. Figure 13 This is a diagram showing the emission of exhaust gas G when a thermal event occurs. (Reference) Figures 11 to 13 In the event of a thermal event, vent gas G or particulate matter P can be released from the battery module 200. As the internal pressure of the battery pack 1000 increases, the venting device 500 can be opened. If the venting device 500 is opened, a relatively low pressure can be formed around the vent port 122a.

[0108] The exhaust gas G or particles P can flow toward the exhaust port 122a. At this time, the exhaust gas G can be guided through the guide portion 410 and discharged through the exhaust port 401. The exhaust gas G can be discharged in an inclined direction SD. Particles P can be discharged through the exhaust port 401. Moreover, some particles P may have reduced energy after colliding with the exhaust device 500 and may fall due to gravity. Since the second portion 122 is inclined relative to the substrate 110, particles P can fall downwards or along the -Z axis direction by gravity without accumulating on the exhaust device 500. Because particles P do not accumulate on the exhaust device 500, blockage of the exhaust port 122a can be prevented. Because particles P do not accumulate in the exhaust device 500, the opening and closing function of the exhaust device 500 can be stably maintained.

[0109] In addition to the battery module 200, the battery pack 1000 according to this disclosure may also include various components, such as components of a battery pack known at the time of filing of this application, such as a battery management system, busbars, relays, current sensors, etc.

[0110] The battery pack 1000 according to this disclosure can be applied to vehicles, such as electric vehicles or hybrid electric vehicles. That is, a vehicle according to this disclosure may include the battery pack 1000. Furthermore, in addition to the battery pack 1000, a vehicle according to this disclosure may also include various other components included in the vehicle. For example, a vehicle according to this disclosure may also include a body, a motor, and control devices such as an ECU (electronic control unit).

[0111] This disclosure has been described in detail. However, it should be understood that while the detailed description and specific examples indicate preferred embodiments of this disclosure, they are given by way of illustration only, as various changes and modifications within the scope of this disclosure will become apparent to those skilled in the art from the detailed description.

Claims

1. A battery pack, the battery pack comprising: substrate; Battery cells arranged on the substrate; Sidewall, the sidewall being mounted on the substrate and having an exhaust port positioned higher than the battery cell; as well as An exhaust device is installed in the exhaust port.

2. The battery pack according to claim 1, in, The sidewall includes: A first portion, the first portion being coupled to the substrate; and The second portion extends inward from the first portion and is inclined relative to the substrate. The vent is located in the second part.

3. The battery pack according to claim 2, further comprising: A battery pack cover, which is attached to the second part and configured to cover the battery cells.

4. The battery pack according to claim 2, in, The angle between the second part and the substrate is 45 degrees or greater.

5. The battery pack according to claim 2, further comprising: An exhaust guide is attached to the outer surface of the second portion and configured to cover the exhaust port.

6. The battery pack according to claim 5, in, The exhaust guide includes a guide portion configured to cover the exhaust port at an angle.

7. The battery pack according to claim 6, in, The angle formed by the inclined surface of the guide portion and the second portion is 45 degrees or less.

8. The battery pack according to claim 5, in, The exhaust guide has an exhaust port formed along the inclined direction of the second part.

9. The battery pack according to claim 1, in, The exhaust device is positioned above the battery cell.

10. The battery pack according to claim 2, further comprising: A module housing, mounted on the substrate and configured to house the battery cells. Wherein, at least one of the vent, the venting device, and the second part is positioned above the module housing.

11. The battery pack according to claim 2, further comprising: A battery management system is mounted on the substrate and electrically connected to the battery cells. Wherein, at least one of the vent, the venting device, and the second part is positioned above the battery management system.

12. The battery pack according to claim 2, further comprising: The partition wall installed on the substrate, Wherein, at least one of the exhaust port, the exhaust device, and the second part is positioned above the partition wall.

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

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