Battery pack

Abstract

Disclosed is a battery pack. The battery pack according to an embodiment of the present invention includes a case in which a space is provided and which has a substrate assembly, and a battery module having a bottom plate assembly mounted on the substrate assembly, wherein the bottom plate assembly includes a first exhaust flow path formed in the bottom plate assembly, a first inflow hole for communicating an inside of the battery module with the first exhaust flow path, and an exhaust hole for communicating an outside of the battery module with the first exhaust flow path.

Description

Technical Field

[0001] This disclosure relates to a battery pack.

[0002] This application claims priority to Korean Patent Application No. 10-2024-0125883, filed in Korea on September 13, 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, tablets and smartwatches, and the growing popularity of electric vehicles, there is active research into 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 very small or no memory effect, so they are more popular than nickel-based rechargeable batteries because their advantages include easy recharging, low self-discharge rate, and high energy density.

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

[0006] Generally, based on the shape of the battery casing, lithium secondary batteries can be divided into can-type secondary batteries in which the electrode assembly is contained in a metal can and bag-type secondary batteries in which the electrode assembly is contained in a bag of aluminum laminate.

[0007] Recently, rechargeable batteries have been widely used in large and medium-sized devices (such as electric vehicles and energy storage systems (ESS) for driving and energy storage) and small devices (such as portable electronic devices). Multiple rechargeable batteries can be electrically connected and stored inside 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 trigger a cascading thermal reaction in other battery modules or other battery cells, potentially causing an explosion or fire or escalating its scale.

[0009] Specifically, when an event such as thermal runaway occurs in a single battery module, gases or flames may be randomly vented to the outside. If the venting of gases or flames is not properly controlled, they may be vented towards 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 there may be components (such as module busbars) for electrical connection to other battery modules or battery packs. Therefore, if a flame is vented to the front side of a battery module, the module terminals may be damaged, and an electrical short circuit may occur within the battery pack. Furthermore, since other battery modules may be located on the front side of the battery module, if a flame is vented to the front of a particular battery module, the vented flame may be directed towards other battery modules, easily leading to the spread of 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 equipment 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 running, there will be no time to move the vehicle to a safe location.

[0011] Furthermore, if heat transfer between battery modules or battery cells is not properly controlled, leading to a sudden fire or explosion, it could potentially result in injury or death to users. For example, in the event of thermal runaway in an electric vehicle, if there is not sufficient time before the fire spreads fully, passengers may not be able to escape safely. Summary of the Invention

[0012] Technical issues

[0013] This disclosure is designed to solve problems in the related art, and therefore aims to provide a battery pack with an improved structure and a vehicle including the battery pack, thereby enabling proper control of the escape of flames and the like generated inside the battery module.

[0014] Furthermore, this disclosure aims to provide a structure that can prevent damage to the appearance of the battery pack in the event of a thermal event.

[0015] Furthermore, this disclosure relates to preventing flames or combustible particles from escaping to the outside of the battery pack in the event of a thermal event.

[0016] Furthermore, this disclosure aims to provide a structure capable of suppressing heat propagation between battery modules.

[0017] However, the technical problems sought to be solved by this disclosure are not limited to those described above, and those skilled in the art will clearly understand from the following description other problems not mentioned herein.

[0018] Technical solution

[0019] In one aspect of this disclosure, a battery pack is provided, the battery pack comprising: a housing having a space therein and having the housing substrate assembly; and a battery module having a base plate assembly mounted on the base plate assembly, wherein the base plate assembly includes: a first exhaust flow path formed in the base plate assembly; a first inlet hole configured to communicate the interior of the battery module with the first exhaust flow path; and an outlet hole configured to communicate the exterior of the battery module with the first exhaust flow path.

[0020] In addition, the substrate assembly may include: a lower plate configured to face the lower surface of the base plate assembly; and an upper plate located on the lower plate, and an exhaust port may communicate with a second exhaust flow path formed between the lower plate and the upper plate.

[0021] In addition, the substrate assembly may also include a spacer located between the upper plate and the lower plate.

[0022] In addition, the battery module may also include an end cap configured to project outward relative to the base plate assembly, and the battery pack may also include a fastening member configured to secure the end cap to the spacer.

[0023] In addition, the fastening components can penetrate the top plate.

[0024] In addition, the housing may include a sidewall mounted on the substrate assembly and configured to form the appearance of the battery pack, and the sidewall may include: a third exhaust flow path formed in the sidewall; and a second inlet hole configured to communicate the second exhaust flow path with the third exhaust flow path.

[0025] In addition, the battery pack may also include an exhaust device that is installed in the housing and configured to communicate with a third exhaust flow path.

[0026] In addition, the sidewalls can be mounted on the lower plate, and the upper plate can be located between the sidewalls and the base plate assembly.

[0027] In addition, the battery pack may also include: a partition wall configured to separate the interior of the housing and mounted on the substrate assembly, and the partition wall may include: a fourth exhaust flow path formed in the partition wall; and a third inlet hole configured to communicate the second exhaust flow path and the fourth exhaust flow path.

[0028] In addition, the partition wall can be installed on the lower plate, and the upper plate can be located between the partition wall and the base plate assembly.

[0029] In addition, the housing may also include a battery pack cover configured to cover the battery module and have cooling flow paths.

[0030] The battery module may include battery cells, and the first inlet hole may face the battery cells.

[0031] In another aspect of this disclosure, a vehicle is also provided, which includes a battery pack according to this disclosure.

[0032] Beneficial effects

[0033] According to at least one embodiment of this disclosure, when gas or flame is generated inside the battery module, the escape of such gas or flame can be appropriately controlled.

[0034] According to at least one embodiment of this disclosure, damage to the appearance of the battery pack can be prevented even in the event of a thermal event.

[0035] According to at least one embodiment of this disclosure, the electrical safety of the battery pack can be improved.

[0036] According to at least one embodiment of this disclosure, heat propagation between battery modules can be suppressed in the event of a thermal event. Attached Figure Description

[0037] 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.

[0038] Figure 1 This is a diagram illustrating a battery pack according to an embodiment of the present disclosure.

[0039] Figure 2 It is shown Figure 1 An exploded view of some components of the battery pack.

[0040] Figures 3 to 5 It is shown Figure 2 A diagram of the base plate assembly of the battery pack.

[0041] Figure 6 It is shown Figure 2 An exploded view of some components of the battery pack.

[0042] Figure 7 This shows the battery module connected to... Figure 6 A diagram of the battery pack.

[0043] Figure 8 It is shown Figure 2 A diagram of the battery module.

[0044] Figure 9 It is shown Figure 8 An exploded view of some components of the battery module.

[0045] Figure 10 It is shown Figure 9 The diagram of the lower frame.

[0046] Figure 11 It is along Figure 10 The cross-sectional view taken from line C-C'.

[0047] Figure 12 Shown from different directions Figure 8 A diagram of the battery module.

[0048] Figure 13 It is a diagram showing the flow of emitted gases.

[0049] Figure 14 It is along Figure 2 The cross-sectional view taken by line B-B'.

[0050] Figure 15 It is along Figure 1 A magnified cross-sectional view of a section taken from line A-A'.

[0051] Figure 16 Shown from different directions Figure 8 A diagram of the battery module.

[0052] Figure 17 It is a diagram showing the flow of emitted gases.

[0053] Figure 18 It is along Figure 1 A magnified cross-sectional view of a section taken from line A-A'.

[0054] Figure 19 It is a diagram showing the flow of emitted gases.

[0055] Figure 20 This is a diagram illustrating a vehicle according to an embodiment of the present disclosure. Detailed Implementation

[0056] Preferred embodiments of the present disclosure will be described in detail below 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 or dictionary meaning, but rather interpreted based on the meaning and concepts corresponding to the technical aspects of the present disclosure, on the basis of allowing the inventors to appropriately define the terminology for best explanation.

[0057] Therefore, the description presented herein is merely a preferred example for illustrative purposes and is not intended to limit the scope of this disclosure. Consequently, it should be understood that other equivalents and modifications may be made thereto without departing from the scope of this disclosure.

[0058] 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.

[0059] Reference Figure 1 and Figure 2 The battery pack 1000 may include a housing 100. The housing 100 may provide space therein. The housing 100 may form the appearance of the battery pack 1000.

[0060] The housing 100 may include a substrate assembly 110. The substrate assembly 110 may have a square shape. The substrate assembly 110 may have a flat shape. The substrate assembly 110 may form the appearance of the battery pack 1000. The substrate assembly 110 may provide the internal space of the battery pack 1000.

[0061] The housing 100 may include sidewalls 120. Sidewalls 120 may be mounted, fastened, coupled, secured, or attached to the upper surface of the substrate assembly 110. Two sidewalls 120 may be provided. Sidewalls 120 may be arranged along the periphery of the substrate assembly 110. Sidewalls 120 may form the appearance of the battery pack 1000. Sidewalls 120 may provide internal space.

[0062] The housing 100 may include a front wall 130. The front wall 130 may be mounted, fastened, coupled, secured, or attached to the upper surface of the substrate assembly 110. The front wall 130 may form the appearance of the battery pack 1000. The front wall 130 may provide internal space. The front wall 130 may be fastened, coupled, secured, or attached to the side wall 120.

[0063] The housing 100 may include a rear wall 140. The rear wall 140 may be mounted, fastened, coupled, secured, or attached to the upper surface of the substrate assembly 110. The rear wall 140 may form the appearance of the battery pack 1000. The rear wall 140 may provide internal space. The rear wall 140 may be fastened, coupled, secured, or attached to the side wall 120.

[0064] The battery pack 1000 may include a venting device 500. The venting device 500 may be mounted on the front wall 130. The venting device 500 may be mounted on the rear wall 140. For example, the venting device 500 may be a valve. 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.

[0065] 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 assembly 110. Partition walls 300 may divide the internal space of the battery pack 1000.

[0066] 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 have a flat plate shape. The battery pack cover 150 may form the exterior of the battery pack 1000. The battery pack cover 150 may cover the internal space of the battery pack 1000. The battery pack cover 150 may be mounted, fastened, coupled, secured, or attached to a side wall 120. The battery pack cover 150 may be mounted, fastened, coupled, secured, or attached to a front wall 130. The battery pack cover 150 may be mounted, fastened, coupled, secured, or attached to a rear wall 140. For example, the battery pack cover 150 may be a heat sink. A cooling flow path 151 may be provided in the battery pack cover 150.

[0067] The battery pack 1000 may include multiple battery modules 200. The battery modules 200 may be located in spaces separated by partition walls 300. The battery modules 200 may be mounted, fastened, connected, secured, or attached to the base plate assembly 110.

[0068] Figures 3 to 5 It is shown Figure 2 A diagram of the substrate assembly 110 of the battery pack 1000. (Refer to...) Figures 3 to 5 The substrate assembly 110 may include a lower plate 111. The lower plate 111 may have a square shape.

[0069] The substrate assembly 110 may include spacers 113 and 114. Spacers 113 and 114 may be disposed on the upper surface of the lower plate 111. Spacers 113 and 114 may be mounted, fastened, connected, fixed, or attached to the lower plate 111.

[0070] Spacers 113 and 114 may include internal spacers 113 and external spacers 114. Multiple internal spacers 113 may be provided. Multiple external spacers 114 may be provided. Internal spacers 113 may be located between external spacers 114.

[0071] The substrate assembly 110 may include an upper plate 112. The upper plate 112 may have a square shape. Multiple upper plates 112 may be provided. The upper plate 112 may have a smaller size than the lower plate 111. The upper plate 112 may be located on the lower plate 111. The upper plate 112 may cover the upper surface of the lower plate 111. The upper plate 112 may be mounted, fastened, connected, fixed, or attached to an internal spacer 113. The upper plate 112 may be mounted, fastened, connected, fixed, or attached to an external spacer 114.

[0072] Spacers 113 and 114 can be located between the upper plate 112 and the lower plate 111. A space or gap can be formed between the upper plate 112 and the lower plate 111. The space 115 or gap 115 between the upper plate 112 and the lower plate 111 can be referred to as a second exhaust flow path 115. Multiple second exhaust flow paths 115 can be provided.

[0073] Figure 6 It is shown Figure 2 Exploded view of some components of the 1000 battery pack. Figure 7 This shows that the battery module 200 is connected to... Figure 6 The diagram shows the 1000 battery pack. (Refer to...) Figure 6 and Figure 7 Side wall 120 can be installed, fastened, connected, fixed, or attached to lower plate 111. Front wall 130 can be installed, fastened, connected, fixed, or attached to lower plate 111. Side wall 120 can be installed, fastened, connected, fixed, or attached to lower plate 111. First partition wall 310 can be installed, fastened, connected, fixed, or attached to lower plate 111. Second partition wall 320 can be installed, fastened, connected, fixed, or attached to lower plate 111.

[0074] The battery module 200 can be placed on the lower plate 111. The battery module 200 can also be placed on the upper plate 112. The two upper plates 112 can be arranged to correspond to one battery module 200. The upper plates 112 can be respectively located on the front and rear sides of the battery module 200.

[0075] Figure 8 It is shown Figure 2 The diagram shows the battery module 200. Figure 9 It is shown Figure 8 An exploded view of some components of the battery module 200. (Refer to...) Figure 8 and Figure 9 The battery module 200 may include a module housing 210. The module housing 210 may have a cuboid shape. The module housing 210 may provide space therein. The module housing 210 may have an open front surface and a rear surface.

[0076] The module housing 210 may include a top plate 211. The top plate 211 may form the appearance of the battery module 200. The module housing 210 may include a lower frame 212. The lower frame 212 may form the appearance of the battery module 200.

[0077] Battery cells 220 can be housed inside module housing 210. Multiple battery cells 220 can be stacked in a left-right direction or a Y-axis direction. Each battery cell 220 may include a receiving portion 221 with electrode assemblies, a first sealing portion 222 protruding to the front and rear sides of the receiving portion 221, and a second sealing portion 223 protruding upward from the receiving portion 221. Furthermore, each battery cell 220 may include electrode tabs 224 protruding to the front and rear sides of the first sealing portion 222, respectively. Each battery cell 220 can extend in a front-rear direction or a X-axis direction. The electrode tabs 224 can protrude to the front and rear sides of each battery cell 220.

[0078] Battery cell 220 can refer to a secondary battery. Specifically, battery cell 220 can be a pouch-type secondary battery. However, the shape of battery cell 220 is not limited to pouch shape and can have various shapes (such as cylindrical or cuboid). Multiple battery cells 220 can be provided.

[0079] 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 around the periphery of the stack. For example, the pad 250 can be configured to be disposed between every four battery cells 220 stacked in a left-right direction.

[0080] The liner 250 may contain an elastic material capable of absorbing the expansion of the battery cell 220. For example, the liner 250 may contain a foam material (such as polyurethane). Alternatively, the liner 250 may contain a material capable of blocking heat or flame. For example, the liner 250 may contain an insulating or flame-retardant material (such as silicone or mica).

[0081] The front busbar frame assembly 231 can be disposed at the front of multiple battery cells 220. The front busbar frame assembly 231 can be electrically connected to the front electrode tabs 224 of the multiple battery cells 220.

[0082] The front busbar frame assembly 231 may include power terminals 231a. Power terminals 231a may be electrically connected to multiple battery cells 220. Power terminals 231a may be arranged in pairs. Power terminals 231a may be exposed to the outside of the battery module 200. Power terminals 231a may be electrically connected to another battery module 200 or a battery management system (BMS).

[0083] The rear busbar frame assembly 232 can be disposed at the rear of the plurality of battery cells 220. The rear busbar frame assembly 232 can be electrically connected to the rear electrode tabs 224 of the plurality of battery cells 220.

[0084] The front cover 241 can be attached to the front side of the module housing 210. The front cover 241 can cover the front surface of the module housing 210. The front cover 241 can have a square shape. The front cover 241 can protrude forward or along the X-axis relative to the lower frame 212.

[0085] The rear end cover 242 can be attached to the rear side of the module housing 210. The rear end cover 242 can cover the rear surface of the module housing 210. The rear end cover 242 can have a square shape. The rear end cover 242 can protrude rearward relative to the lower frame 212 or along the -X axis direction.

[0086] The front insulating cover 261 can be located between the front cover 241 and the front busbar frame assembly 231. The front insulating cover 261 can electrically insulate the front busbar frame assembly 231 from the front cover 241.

[0087] The rear insulating cover 262 can be located between the rear end cover 242 and the rear busbar frame assembly 232. The rear insulating cover 262 can electrically insulate the rear busbar frame assembly 232 from the rear end cover 242.

[0088] Figure 10 It is shown Figure 9 The lower frame of the diagram is 212. Figure 11 It is along Figure 10 The cross-sectional view taken by line C-C'. (Refer to...) Figures 8 to 11 The lower frame 212 may include a base plate assembly 213. The base plate assembly 213 may be mounted, fastened, connected, secured, or attached to the base plate assembly 110. The base plate assembly 213 may face the lower plate 111. The base plate assembly 213 may contact the lower plate 111.

[0089] The base plate assembly 213 may include a first exhaust flow path 213b formed therein. The first exhaust flow path 213b may extend in the front-back direction or the X-axis direction. Multiple first exhaust flow paths 213b may be provided. Multiple first exhaust flow paths 213b may be arranged in the left-right direction or the Y-axis direction.

[0090] The base plate assembly 213 may have a first inlet hole 213a. The first inlet hole 213a may be formed in the upper surface of the base plate assembly 213. The first inlet hole 213a can communicate the interior of the module housing 210 with the first exhaust flow path 213b. The first inlet hole 213a can also communicate the interior of the battery module 200 with the first exhaust flow path 213b. Multiple first inlet holes 213a may be provided. Three first inlet holes 213a may be provided in one first exhaust flow path 213b. The three first inlet holes 213a provided in one first exhaust flow path 213b may be arranged along the front-back direction or the X-axis direction.

[0091] In addition, the multiple first inflow holes 213a can be arranged along the left-right direction or the Y-axis direction.

[0092] The base plate assembly 213 may have a discharge port 213c. The discharge port 213c can connect the exterior of the battery module 200 to the first exhaust flow path 213b. The discharge port 213c can also connect the exterior of the module housing 210 to the first exhaust flow path 213b. The discharge port 213c may be respectively located on the front and rear sides of the base plate assembly 213.

[0093] When a thermal event occurs inside the battery module 200, the exhaust gas G can be discharged through the base plate assembly 213. The exhaust gas G can be discharged in the front-to-back direction or the X-axis direction. The base plate assembly 213 can guide the flow of the exhaust gas G. The base plate assembly 213 can help control the exhaust.

[0094] Reference Figures 8 to 11 The first inlet hole 213a may face the battery cell 220. Multiple battery cells 220 may be arranged on the upper surface of the base plate assembly 213. Multiple battery cells 220 may contact the upper surface of the base plate assembly 213. For example, the first inlet hole 213a may face the receiving portion 221. Alternatively, the first inlet hole 213a may face the second sealing portion 223. By arranging multiple first inlet holes 213a along the front-back direction or the X-axis direction, the exhaust gas G can be easily discharged.

[0095] Reference Figures 8 to 11 The lower frame 212 may include side panels 214. Side panels 214 may extend upwards from the base plate assembly 213 or along the +Z axis. Side panels 214 may be arranged in pairs. A pair of side panels 214 may be arranged facing each other. Side panels 214 and the base plate assembly 213 may be integrally formed.

[0096] Figure 12 Shown from different directions Figure 8 The diagram shows the battery module 200. Figure 13 This is a diagram showing the flow of the emitted gas G. Figure 14 It is along Figure 2 The cross-sectional view taken by line B-B'. Figure 15 It is along Figure 1 A magnified cross-sectional view of a section taken from line A-A'.

[0097] Reference Figures 12 to 15 The front cover 241 may protrude forward or along the +X axis. The front cover 241 may protrude forward or along the X axis relative to the base plate assembly 213. The front cover 241 may protrude outward relative to the base plate assembly 213.

[0098] The base plate assembly 213 can be located on the lower plate 111. The front cover 241 can be located on the upper plate 112. Fastening members S can fasten, mount, connect, or fix the battery module 200 to the base plate assembly 110. Fastening members S can fasten, mount, connect, or fix the front cover 241 to the upper plate 112. Fastening members S can fasten, mount, connect, or fix to the internal spacer 113. Fastening members S can penetrate the upper plate 112.

[0099] Reference Figures 12 to 15 The base plate assembly 213 can communicate with the second exhaust flow path 115. The exhaust port 213c can communicate with the second exhaust flow path 115. The exhaust gas G generated inside the battery module 200 can flow into the base plate assembly 213 through the first inlet port 213a. The exhaust gas G can be discharged to the exhaust port 213c through the first exhaust flow path 213b. The exhaust gas G discharged through the exhaust port 213c can flow into the second exhaust flow path 115. The exhaust gas G can be discharged through a flow path provided for each battery module 200. As a result, the propagation of thermal events caused by the exhaust gas G can be suppressed. As a result, the thermal safety of the battery pack 1000 can be improved.

[0100] Sidewall 120 can be mounted, fastened, connected, fixed, or attached to lower plate 111. Upper plate 112 can be located between sidewall 120 and base plate assembly 213. Internal spacer 113 can be located between sidewall 120 and base plate assembly 213. External spacer 114 can be located between sidewall 120 and base plate assembly 213. Sidewall 120 can extend in the left-right direction or the Y-axis direction.

[0101] The sidewall 120 may have a third exhaust flow path 122. The third exhaust flow path 122 may extend along the longitudinal direction of the sidewall 120. The third exhaust flow path 122 may extend along the left-right direction or the Y-axis direction. The sidewall 120 may have a second inlet hole 121. The second inlet hole 121 may be disposed on the inner side of the sidewall 120. The second inlet hole 121 may communicate with the third exhaust flow path 122. The second inlet hole 121 may communicate with the second exhaust flow path 115.

[0102] The front wall 130 may have a flow path. The front wall 130 may be connected to the third exhaust flow path 122 and the exhaust device 500. The rear wall 140 may have a flow path. The rear wall 140 may be connected to the third exhaust flow path 122 and the exhaust device 500.

[0103] The exhaust gas G introduced into the second exhaust flow path 115 can be introduced into the second inlet hole 121. The exhaust gas G introduced into the second inlet hole 121 can flow along the third exhaust flow path 122. The exhaust gas G can be introduced into the front wall 130 along the third exhaust flow path 122. The exhaust gas G can be discharged to the outside of the battery pack 1000 through the exhaust device 500 provided in the front wall 130. The exhaust gas G can be introduced into the rear wall 140 along the third exhaust flow path 122. The exhaust gas G can be discharged to the outside of the battery pack 1000 through the exhaust device 500 provided in the rear wall 140.

[0104] The battery module 200 can have an independent exhaust path. This can suppress the propagation of thermal events caused by the exhaust gas G, thereby improving the thermal safety of the battery pack 1000.

[0105] The battery pack cover 150 may face the upper surface of the battery module 200. The battery pack cover 150 may contact, connect, fasten, attach, fix, or attach to the upper surface of the battery module 200. The battery pack cover 150 may have a cooling flow path 151. Cooling fluid may flow through the cooling flow path 151.

[0106] The battery module 200 can exhaust the exhaust gas G through the base plate assembly 213 and the base plate assembly 110. As a result, the upper surface of the battery module 200 can contact the battery pack cover 150 for heat dissipation.

[0107] Figure 16 Shown from different directions Figure 8 The diagram shows the battery module 200. Figure 17 This is a diagram showing the flow of the emitted gas G. Figure 18 It is along Figure 1 A magnified cross-sectional view of a section taken from line A-A'.

[0108] Reference Figures 16 to 18 The rear end cover 242 may protrude rearward or along the X-axis. The rear end cover 242 may protrude rearward or along the -X-axis relative to the base plate assembly 213. The rear end cover 242 may protrude outward relative to the base plate assembly 213.

[0109] The base plate assembly 213 can be located on the lower plate 111. The rear end cover 242 can be located on the upper plate 112. Fastening members S can fasten, mount, connect, or fix the battery module 200 to the base plate assembly 110. Fastening members S can fasten, mount, connect, or fix the rear end cover 242 to the upper plate 112. Fastening members S can fasten, mount, connect, or fix to the internal spacer 113. Fastening members S can penetrate the upper plate 112.

[0110] Reference Figures 16 to 18 The base plate assembly 213 can communicate with the second exhaust flow path 115. The exhaust port 213c can communicate with the second exhaust flow path 115. The exhaust gas G generated inside the battery module 200 can flow into the base plate assembly 213 through the first inlet port 213a. The exhaust gas G can be discharged to the exhaust port 213c through the first exhaust flow path 213b. The exhaust gas G discharged through the exhaust port 213c can flow into the second exhaust flow path 115. The exhaust gas G can be discharged through a flow path provided for each battery module 200. As a result, the propagation of thermal events caused by the exhaust gas G can be suppressed. As a result, the thermal safety of the battery pack 1000 can be improved.

[0111] The second partition wall 320 can be installed, fastened, connected, fixed, or attached to the lower plate 111. The upper plate 112 can be located between the second partition wall 320 and the base plate assembly 213. The internal spacer 113 can be located between the second partition wall 320 and the base plate assembly 213. The external spacer 114 can be located between the second partition wall 320 and the base plate assembly 213. The second partition wall 320 can extend in the left-right direction or the Y-axis direction.

[0112] The second partition wall 320 may have a fourth exhaust flow path 322. The fourth exhaust flow path 322 may extend along the longitudinal direction of the second partition wall 320. The fourth exhaust flow path 322 may extend along the left-right direction or the Y-axis direction. The second partition wall 320 may have a third inlet hole 321. The third inlet hole 321 may be located on the left side of the second partition wall 320. The third inlet hole 321 may be located on the right side of the second partition wall 320. The third inlet hole 321 may communicate with the fourth exhaust flow path 322.

[0113] The front wall 130 may have a flow path. The front wall 130 may be connected to the fourth exhaust flow path 322 and the exhaust device 500. The rear wall 140 may have a flow path. The rear wall 140 may be connected to the fourth exhaust flow path 322 and the exhaust device 500.

[0114] The exhaust gas G introduced into the second exhaust flow path 115 can flow into the third inlet hole 321. The exhaust gas G introduced into the third inlet hole 321 can flow along the fourth exhaust flow path 322. The exhaust gas G can be introduced into the front wall 130 along the fourth exhaust flow path 322. The exhaust gas G can be discharged to the outside of the battery pack 1000 through the exhaust device 500 provided at the front wall 130. The exhaust gas G can be introduced into the rear wall 140 along the fourth exhaust flow path 322. The exhaust gas G can be discharged to the outside of the battery pack 1000 through the exhaust device 500 provided at the rear wall 140.

[0115] The battery module 200 can have an independent exhaust path. This can suppress the propagation of thermal events caused by the exhaust gas G, thereby improving the thermal safety of the battery pack 1000.

[0116] Figure 19 This is a diagram showing the flow of the emitted gas G. (Refer to...) Figure 19 When a thermal event occurs in the battery module 200, the exhaust gas G can flow in the front-back direction or the X-axis direction.

[0117] The exhaust gas G discharged along the +X axis direction can flow through the side wall 120. The exhaust gas G discharged through the side wall 120 can be discharged to the outside of the battery pack 1000 through the exhaust device 500 provided at the front wall 130 or the rear wall 140. The exhaust gas G discharged along the +X axis direction can be discharged through the first exhaust flow path 213b, the second exhaust flow path 115 and the third exhaust flow path 122.

[0118] The exhaust gas G discharged along the -X axis direction can flow through the second partition wall 320. The exhaust gas G discharged through the second partition wall 320 can be discharged to the outside of the battery pack 1000 through the exhaust device 500 provided at the front wall 130 or the rear wall 140. The exhaust gas G discharged along the -X axis direction can be discharged through the first exhaust flow path 213b, the second exhaust flow path 115 and the fourth exhaust flow path 322.

[0119] By configuring the exhaust path of the exhaust gas G to be longer, the emission of flames or combustible particles to the outside of the battery pack 1000 can be suppressed. Furthermore, by configuring the exhaust path of the exhaust gas G to be longer, heat or impact applied to any part of the battery pack 1000 can be dispersed. As a result, damage to the battery pack 1000 can be reduced.

[0120] Figure 20 This is a diagram illustrating a vehicle V according to an embodiment of the present disclosure. (Refer to...) Figure 20 The vehicle V according to this disclosure may include the battery pack 1000 of this disclosure.

[0121] Furthermore, the battery pack 1000 according to this disclosure may also include various components other than the battery module 200, such as various components of a battery pack known at the time of filing of this application (such as BMS, busbars, relays, current sensors, etc.).

[0122] The battery pack 1000 according to this disclosure can be applied to a vehicle V (such as an electric vehicle or a hybrid electric vehicle). In addition to the battery pack 1000, the vehicle V according to this disclosure may also include various other components included in the vehicle V. For example, the vehicle V according to this disclosure may also include a body, a motor, control devices such as an electronic control unit (ECU), etc.

[0123] 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 based on the detailed description.

Claims

1. A battery pack, the battery pack comprising: A housing having a space therein and having a substrate assembly; as well as The battery module has a base plate assembly mounted on the base plate assembly. The base plate assembly includes: A first exhaust flow path is formed in the base plate assembly; A first inlet port, configured to communicate the interior of the battery module with the first exhaust path; and An exhaust port is configured to connect the exterior of the battery module to the first exhaust path.

2. The battery pack according to claim 1, in, The substrate assembly includes: Lower plate, the lower plate being configured to face the lower surface of the base plate assembly; and The upper plate is located on the lower plate. The discharge hole is connected to a second exhaust flow path formed between the lower plate and the upper plate.

3. The battery pack according to claim 2, in, The substrate assembly also includes a spacer located between the upper plate and the lower plate.

4. The battery pack according to claim 3, in, The battery module also includes an end cap configured to project outwards relative to the base plate assembly, and The battery pack also includes a fastening member configured to fasten the end cap to the spacer.

5. The battery pack according to claim 4, in, The fastening member penetrates the upper plate.

6. The battery pack according to claim 2, in, The housing also includes sidewalls that are mounted on the substrate assembly and configured to form the appearance of the battery pack. The sidewall includes: A third exhaust flow path is formed in the sidewall; and The second inlet hole is configured to connect the second exhaust flow path to the third exhaust flow path.

7. The battery pack according to claim 6, further comprising: An exhaust device is installed in the housing and configured to communicate with the third exhaust flow path.

8. The battery pack according to claim 6, in, The sidewall is mounted on the lower plate, and The upper plate is located between the side wall and the bottom plate assembly.

9. The battery pack according to claim 2, further comprising: A partition wall, configured to separate the interior of the housing and mounted on the base plate assembly. The partition wall includes: A fourth exhaust flow path is formed in the partition wall; and A third inlet hole is configured to connect the second exhaust flow path to the fourth exhaust flow path.

10. The battery pack according to claim 9, in, The partition wall is installed on the lower plate, and The upper plate is located between the partition wall and the bottom plate assembly.

11. The battery pack according to claim 1, in, The housing also includes a battery pack cover configured to cover the battery module, and the battery pack cover has cooling flow paths.

12. The battery pack according to claim 1, in, The battery module includes battery cells, and The first inlet hole faces the battery cell.

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

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