Battery pack

Abstract

A battery pack is disclosed. The battery pack according to an embodiment of the present application can include a bottom cover assembly, a battery module mounted on an upper surface of the bottom cover assembly, a top cover assembly located above the battery module, having a flow path formed in the top cover assembly, and including an injection hole communicating with the flow path and facing the battery module, a hole cover coupled to a lower surface of the top cover assembly and for sealing the injection hole, and a support fixed between the hole cover and the battery module and supporting the hole cover.

Description

Technical Field

[0001] This disclosure relates to battery packs.

[0002] This application claims priority to Korean Patent Application No. 10-2024-0153821, filed on November 1, 2024, and Korean Patent Application No. 10-2025-0012472, filed on January 31, 2025, the disclosures of which are 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, 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 these rechargeable batteries, lithium rechargeable batteries have little or no memory effect, and are therefore more popular than nickel-based rechargeable batteries due to their advantages of being easily rechargeable at any time, having a very low self-discharge rate, and 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 electrode assemblies and a sealed package or battery casing. The electrode assembly includes a positive electrode plate and a negative electrode plate coated with positive and negative electrode active materials, respectively, and a separator is inserted between the positive and negative electrode plates. The sealed package or battery casing houses the electrode assembly and the electrolyte solution.

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

[0007] Recently, secondary batteries have been widely used not only in small devices such as portable electronic devices, but also in medium and large devices such as electric vehicles and energy storage systems (ESS) for driving and storing energy. Multiple secondary batteries can be electrically connected and stored inside a module housing to form a battery module. Each secondary 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, it is necessary to prevent the propagation of thermal runaway to other battery modules or other battery cells. 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 leading to or increasing the scale of an explosion or fire.

[0009] Specifically, when an event such as thermal runaway occurs in a single battery module, gas or flame can be randomly vented to the outside. If the venting of gas or flame is not properly controlled, it can be directed towards other battery modules, potentially causing a thermal cascade in those modules. Specifically, module terminals may be located on the front side of the battery module, and components such as module busbars may be present for electrical connections 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 a short circuit may occur 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 vented to the front of that module, the vented flame may be directed to other battery modules, potentially leading to flame propagation 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 lead to the sudden shutdown of the device housing the battery module or battery pack, resulting in unexpected damage. For example, if a sudden voltage drop occurs in the battery pack while an electric vehicle is running, 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 and causes a sudden fire or explosion, there is a high probability of injury or death to users. For example, in the event of thermal runaway in an electric vehicle, if a sufficient amount of time is not allowed before it develops into a full-blown fire, occupants may not be able to escape safely. Summary of the Invention

[0012] Technical issues

[0013] This disclosure is designed to address problems in the related art, and therefore aims to provide a battery pack and a vehicle including the battery pack, the battery pack having an improved structure that allows for proper control of emissions such as flames generated inside the battery module.

[0014] In addition, this disclosure relates to a structure that enables the rapid injection of coolant into a battery module in the event of a thermal event.

[0015] In addition, this disclosure relates to providing a structure capable of suppressing heat propagation between battery cells or battery modules.

[0016] In addition, this disclosure relates to a structure that enhances the rigidity of the portion into which coolant is injected, thereby preventing damage or deformation due to coolant pressure.

[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, comprising: a bottom cover assembly; a battery module mounted on an upper surface of the bottom cover assembly; a top cover assembly located on the battery module and having a flow path and an injection port, the flow path being formed in the top cover assembly and the injection port being configured to communicate with the flow path and face the battery module; a port cover coupled to a lower surface of the top cover assembly and configured to seal the injection port; and a support member fixed between the port cover and the battery module and configured to support the port cover.

[0020] Additionally, the cap can be in the shape of a sheet.

[0021] In addition, the support components may contain a flexible material.

[0022] Additionally, the support can be compressed between the cover and the battery module.

[0023] In addition, the support components may contain metallic materials.

[0024] Additionally, the battery module may include: a module housing that provides space within the module housing and has a top plate; and a battery cell located inside the module housing, with a support member that can be attached to the upper surface of the top plate.

[0025] In addition, the support components and the top plate can be formed as a single unit.

[0026] Additionally, the support member may have a connection hole facing the cover.

[0027] Additionally, the injection port and the connection port can be configured to communicate with each other in the event of a thermal event.

[0028] Additionally, the battery module may include: a module housing that provides space within the module housing and has a top plate; and a battery cell located inside the module housing, and the top plate may have an inlet port configured to communicate with an injection port.

[0029] Additionally, the injection hole may include a portion whose diameter increases as it ascends.

[0030] Additionally, the top cover assembly may include: a lower plate having an injection hole formed therein; and an upper plate disposed on the lower plate, wherein the area between the injection hole and the upper surface of the lower plate may be rounded or chamfered.

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

[0032] Beneficial effects

[0033] According to at least one embodiment of the present disclosure, coolant can be rapidly injected into the battery module in the event of a thermal event.

[0034] According to at least one embodiment of the present disclosure, deformation or damage to the portion of the coolant injected therein due to coolant pressure can be prevented.

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

[0036] According to at least one embodiment of the present disclosure, thermal propagation between battery modules can be suppressed when a thermal event occurs. 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] Figure 3 It is shown Figure 2 An exploded view of some components of the battery pack.

[0041] Figure 4 It is shown Figure 3 A diagram of the top cover assembly.

[0042] Figure 5It is shown Figure 4 A diagram of some components of the top cover assembly.

[0043] Figure 6 It is shown Figure 5 A magnified view of part C.

[0044] Figure 7 yes Figure 5 The bottom 3D view.

[0045] Figure 8 It is shown Figure 4 A three-dimensional view of the bottom of the top cover assembly.

[0046] Figure 9 It is along Figure 4 The cross-sectional view taken by line D-D'.

[0047] Figure 10 It is along Figure 4 A cross-sectional view taken from line E-E'.

[0048] Figure 11 It is shown Figure 3 A diagram of the battery module.

[0049] Figure 12 It is shown Figure 11 A diagram of some components of a battery module.

[0050] Figure 13 It is shown Figure 3 A diagram of some components of the battery pack.

[0051] Figure 14 It is along Figure 13 The cross-sectional view taken by line F-F'.

[0052] Figure 15 It is shown Figure 3 A diagram of the support components.

[0053] Figure 16 It is along Figure 15 A cross-sectional view taken from line H-H'.

[0054] Figure 17 It is along Figure 15 The cross-sectional view taken from line I-I'.

[0055] Figure 18 It is along Figure 1 A cross-sectional view taken from line A-A'.

[0056] Figure 19 It is shown Figure 18 The cross-section configuration is filled with coolant.

[0057] Figure 20This shows what happens when a thermal event occurs. Figure 18 A graph showing the changes in [the data / process].

[0058] Figure 21 It is along Figure 1 The cross-sectional view taken by line B-B'.

[0059] Figure 22 It is shown Figure 21 The cross-section configuration is filled with coolant.

[0060] Figure 23 This shows what happens when a thermal event occurs. Figure 22 A graph showing the changes in [the data / process].

[0061] Figure 24 This is a diagram illustrating a vehicle according to an embodiment of the present disclosure. Detailed Implementation

[0062] 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 is interpreted according to the meaning and concept corresponding to the technical aspects of the present disclosure, based on the principle that inventors are allowed to appropriately define terms for the best interpretation.

[0063] Therefore, the description presented herein is merely a preferred example for illustrative purposes only 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.

[0064] 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.

[0065] Reference Figures 1 to 3 The housing 100 may provide space therein. The housing 100 may include a bottom cover assembly 110. The bottom cover assembly 110 may have a square shape. The bottom cover assembly 110 may have a flat shape. The bottom cover assembly 110 may form the appearance of the battery pack 1000. The bottom cover assembly 110 may provide internal space for the battery pack 1000.

[0066] The housing 100 may include sidewalls 120. The sidewalls 120 may be mounted, fastened, secured, coupled, or attached to the upper surface of the bottom cover assembly 110. The sidewalls 120 may be provided along the periphery of the bottom cover assembly 110. For example, four sidewalls 120 may be provided. The sidewalls 120 may provide internal space for the battery pack 1000.

[0067] The housing 100 may include a top cover assembly 150. The top cover assembly 150 may have a square plate shape. The top cover assembly 150 may have a flat plate shape. The top cover assembly 150 may form the appearance of the battery pack 1000. The top cover assembly 150 may cover the internal space of the battery pack 1000. The top cover assembly 150 may be mounted, fastened, secured, coupled, or attached to the side wall 120.

[0068] The battery pack 1000 according to embodiments of the present disclosure may include partition walls 300. Multiple partition walls 300 may be provided. Partition walls 300 may be mounted, fastened, fixed, connected, or attached to the upper surface of the base cover assembly 110. Partition walls 300 may divide the internal space of the battery pack 1000. Partition walls 300 may extend along a front-rear direction or an X-axis direction. Multiple partition walls 300 may be arranged along a left-right direction or a Y-axis direction.

[0069] The battery pack 1000 according to embodiments of the present disclosure may include mounting beams 400. Multiple mounting beams 400 may be provided. The mounting beams 400 may be mounted, fastened, secured, connected, or attached to the upper surface of the base cover assembly 110. The mounting beams 400 may partition the internal space of the battery pack 1000. The mounting beams 400 may extend along a left-right direction or a Y-axis direction. Multiple mounting beams 400 may be arranged along a front-back direction or an X-axis direction.

[0070] Battery module 200 can be disposed inside housing 100. Battery module 200 can be mounted, fastened, secured, coupled, or attached to the upper surface of bottom cover assembly 110. Battery module 200 can be mounted, fastened, secured, coupled, or attached to mounting beam 400. Multiple battery modules 200 can be provided. For example, four battery modules 200 can be provided. Battery modules 200 can be located in spaces separated by partition walls 300.

[0071] The exhaust device 500 can be mounted on the side wall 120. For example, the exhaust device 500 can be mounted on the left side wall 120. For example, the exhaust device 500 can be a valve. When the pressure inside the housing 100 increases, the exhaust device 500 can open to release gas. In addition, the exhaust device 500 can prevent outside air from flowing into the housing 100. Multiple exhaust devices 500 can be provided.

[0072] A cover 155 can be disposed between the top cover assembly 150 and the battery module 200. A cover 155 can be disposed for each battery module 200. For example, four covers 155 can be disposed.

[0073] A heat transfer component 800 may be disposed between the top cover assembly 150 and the battery module 200. A heat transfer component 800 may be provided for each battery module 200. For example, the heat transfer component 800 may be made of a material with high thermal conductivity. For example, the heat transfer component 800 may be resin.

[0074] Figure 4 It is shown Figure 3 The top cover assembly 150 is shown in the diagram. Figure 5 It is shown Figure 4 A diagram of some components of the top cover assembly 150. Figure 6 It is shown Figure 5 A magnified view of part C. Figure 7 yes Figure 5 The bottom 3D view. Figure 8 It is shown Figure 4 A three-dimensional view of the bottom of the top cover assembly 150.

[0075] Reference Figures 4 to 8 The top cover assembly 150 may include an upper plate 151 and a lower plate 152. The upper plate 151 may have a rectangular shape. The upper plate 151 may form the appearance of the battery pack 1000. The lower plate 152 may also have a rectangular shape. The lower plate 152 may form the appearance of the battery pack 1000. The upper plate 151 may be disposed on the lower plate 152. The top cover assembly 150 may include a cooling flow path 153. The cooling flow path 153 may be disposed between the upper plate 151 and the lower plate 152. The top cover assembly 150 may have an injection hole 154. The injection hole 154 may be formed in the lower plate 152. The injection hole 154 may communicate with the cooling flow path 153. Multiple injection holes 154 may be provided. The injection holes 154 may extend along the front-back direction or the X-axis direction. Multiple injection holes 154 may be arranged along the left-right direction or the Y-axis direction.

[0076] The top cover assembly 150 may include a port cover 155. The port cover 155 may be attached, coupled, fastened, or fixed to the lower surface of the lower plate 152. For example, the port cover 155 may be fused to the lower surface of the lower plate 152. The port cover 155 may seal injection holes 154. The port cover 155 may seal multiple injection holes 154. The port cover 155 may have a square shape. The port cover 155 may have a sheet shape. Multiple port covers 155 may be provided. The port covers 155 may be provided in a one-to-one correspondence with the battery module 200.

[0077] The cap 155 may contain a polymer material. For example, the cap 155 may contain a material having a melting point of 170°C or lower. For example, the cap 155 may contain PLA (polylactic acid) material.

[0078] Figure 9 It is along Figure 4 The cross-sectional view taken by line D-D'. Figure 10 It is along Figure 4 A cross-sectional view taken from line E-E'.

[0079] Reference Figure 9 and Figure 10 The injection hole 154 can have a square shape. The peripheral portion 154a of the injection hole 154 can have a curved surface. The diameter of the injection hole 154 can increase along the +Z axis direction or upwards. For example, the diameter Dx of the injection hole 154 in the front-back direction or X-axis direction can increase upwards. For example, the diameter Dy of the injection hole 154 in the left-right direction or Y-axis direction can increase along the +Z axis direction or upwards.

[0080] Figure 11 It is shown Figure 3 The diagram shows the battery module 200. Figure 12 It is shown Figure 11 A diagram of some components of the battery module 200.

[0081] Reference Figure 11 and Figure 12 The module housing 210 may have a right-angled parallelepiped shape. The module housing 210 may form the appearance of the battery module 200. The module housing 210 may provide space therein. The module housing 210 may include an upper frame 211 and a lower frame 212.

[0082] The upper frame 211 may include a top plate 211a. The top plate 211a may have an inlet hole 211b. The inlet hole 211b may extend along the front-back direction or the X-axis direction. Multiple inlet holes 211b may be provided. Multiple inlet holes 211b may be arranged along the left-right direction or the Y-axis direction.

[0083] The upper frame 211 may include a first side plate 211c. The first side plates 211c may be arranged in pairs. The first side plates 211c may be respectively disposed on the left and right sides of the top plate 211a. The first side plates 211c may extend downward from the top plate 211a.

[0084] The upper frame 211 may include a first end plate 211d. The first end plates 211d may be a pair. The first end plates 211d may be respectively disposed on the front and rear sides of the top plate 211a. The first end plates 211d may extend downward from the top plate 211a.

[0085] The lower frame 212 may include a base plate 212a. The base plate 212a may have vents 212b. The vents 212b may extend along the front-back direction or the X-axis direction. Multiple vents 212b may be provided. Multiple vents 212b may be arranged along the left-right direction or the Y-axis direction.

[0086] The lower frame 212 may include a second side plate 212c. The second side plates 212c may be arranged in pairs. The second side plates 212c may be respectively disposed on the left and right sides of the base plate 212a. The second side plates 212c may extend upward from the base plate 212a.

[0087] The lower frame 212 may include a second end plate 212d. The second end plates 212d may be a pair. The second end plates 212d may be respectively disposed on the front and rear sides of the base plate 212a. The second end plates 212d may extend upward from the base plate 212a.

[0088] The upper frame 211 and the lower frame 212 can be connected, fastened, attached, or assembled. The first side plate 211c can be located outside the second side plate 212c. The first end plate 211d can be located outside the second end plate 212d. The top plate 211a and the bottom plate 212a can face each other.

[0089] Battery cell 220 can be housed inside module housing 210. Multiple battery cells 220 can be provided. Battery cell 220 can refer to a rechargeable battery. Specifically, battery cell 220 can be a pouch-type rechargeable battery. However, the shape of battery cell 220 is not limited to a pouch shape, and battery cell 220 can have various shapes, such as a cylindrical shape or a right-angled parallelepiped shape.

[0090] The battery cell 220 may extend along a front-to-back direction or an X-axis direction. The battery cell 220 may have a cell housing 220a providing space therein. The cell housing 220a may include a receiving portion 221 for accommodating electrode assemblies, a first sealing portion 222 projecting toward the front and rear sides of the receiving portion 221, respectively, and a second sealing portion 223 projecting below the receiving portion 221. The first sealing portion 222 and the second sealing portion 223 may be formed by engaging or attaching the cell housing 220a. The top end of the receiving portion 221 may be referred to as a fold portion 226. The fold portion 226 may be formed by folding the cell housing 220a. Furthermore, the battery cell 220 may include electrode leads 224 projecting toward the front and rear sides of the first sealing portion 222, respectively. The electrode leads 224 may project forward and backward from each battery cell 220. Multiple battery cells 220 may be stacked along a left-to-right direction or an X-axis direction. The battery cell 220 may include an adhesive member 225 that folds and secures the second seal 223 to the receiving portion 221. The adhesive member 225 can bond the second seal 223 to the receiving portion 221. Multiple adhesive members 225 may be provided. Multiple adhesive members 225 may be arranged along the front-back direction or the X-axis direction.

[0091] Barrier 250 can be disposed between multiple battery cells 220. Barrier 250 can be disposed between at least some of the battery cells 220 and / or around the periphery of the stack. For example, barrier 250 can be configured to be disposed between every two battery cells 220 stacked in a left-right direction.

[0092] Barrier 250 may comprise an elastic material to absorb the expansion of battery cell 220. For example, barrier 250 may be made of a foamed material such as polyurethane. Alternatively, barrier 250 may comprise a material capable of blocking heat or flame. For example, barrier 250 may comprise an insulating or flame-retardant material such as silicone or mica.

[0093] The front busbar frame assembly 230 can be disposed on the front side of multiple battery cells 220. The front busbar frame assembly 230 can be electrically connected to the front electrode leads 224 of the multiple battery cells 220.

[0094] The rear busbar frame assembly 230 can be disposed on the rear side of the plurality of battery cells 220. The rear busbar frame assembly 230 can be electrically connected to the rear electrode leads 224 of the plurality of battery cells 220. The rear busbar frame assembly 230 may include power terminals 231.

[0095] Figure 13 It is shown Figure 3 A diagram of some components of the 1000 battery pack. Figure 14 It is along Figure 13The cross-sectional view taken by line F-F'.

[0096] Reference Figure 13 and Figure 14 The bottom cover assembly 110 can form the appearance of the battery pack 1000. The bottom cover assembly 110 can have a rectangular shape. The bottom cover assembly 110 can have an exhaust flow path 111 therein. The bottom cover assembly 110 can have an outlet hole 112. The outlet hole 112 can be formed in the upper surface of the bottom cover assembly 110. The outlet hole 112 can communicate with the exhaust flow path 111. Multiple outlet holes 112 can be provided. The outlet holes 112 can extend along the front-back direction or the X-axis direction. Multiple outlet holes 112 can be arranged along the left-right direction or the Y-axis direction. The outlet holes 112 can be configured to correspond to the exhaust holes 212b in a one-to-one relationship. The outlet holes 112 can have substantially the same size as the exhaust holes 212b.

[0097] The exhaust flow path 111 can communicate with the interior of the side wall 120. The interior of the side wall 120 can communicate with the exhaust device 500. In the event of a thermal event, the exhaust gas G generated from the battery cell 220 can be discharged through the exhaust port 212b of the battery module 200 to the outlet port 112 and the exhaust flow path 111. The exhaust gas G can flow along the exhaust flow path 111 toward the exhaust device 500. The exhaust gas G can be discharged to the outside of the battery pack 1000 through the exhaust device 500.

[0098] Figure 15 It is shown Figure 3 The diagram shows the support component 600. Figure 16 It is along Figure 15 A cross-sectional view taken from line H-H'. Figure 17 It is along Figure 15 The cross-sectional view taken from line I-I'.

[0099] Reference Figures 15 to 17 The support member 600 may include a first portion 610. The first portion 610 may have a rectangular shape. The connecting hole 611 may extend along the front-back direction or the X-axis direction. Multiple connecting holes 611 may be provided. Multiple connecting holes 611 may be arranged along the left-right direction or the Y-axis direction.

[0100] The second portion 620 may extend from the first portion 610. The second portion 620 may extend along the periphery of the upper surface of the battery module 200. The second portion 620 may extend along the periphery of the top plate 211a. The support member 600 may have a pair of openings 601. Each opening 601 may be surrounded by the second portion 620 and the first portion 610. The first portion 610 may be located between the pair of openings 601. Each opening 601 may have a rectangular shape.

[0101] The support member 600 can be integrally formed. The first portion 610 and the second portion 620 can be integrally formed. The support member 600 can contain an elastic material. For example, the support member 600 can contain a silicone material. Alternatively, the support member 600 can contain a metallic material. For example, the support member 600 can contain an aluminum material.

[0102] Figure 18 It is along Figure 1 A cross-sectional view taken from line A-A'. Figure 19 It is shown Figure 18 The cross-section configuration is filled with coolant CL. Figure 20 This shows what happens when a thermal event occurs. Figure 18 A graph showing the changes in [the data / process]. Figure 21 It is along Figure 1 The cross-sectional view taken by line B-B'. Figure 22 It is shown Figure 21 The cross-section configuration is filled with coolant CL. Figure 23 This shows what happens when a thermal event occurs. Figure 22 A graph showing the changes in [the data / process].

[0103] Reference Figures 18 to 23 The support member 600 can be attached to the upper surface of the battery module 200. The support member 600 can be attached to the upper surface of the top plate 211a. The support member 600 can be attached to the lower surface of the top cover assembly 150. The support member 600 can be attached to the lower surface of the lower plate 152.

[0104] If the support member 600 contains a metallic material, it can be brazed to the upper surface of the battery module 200. If the support member 600 contains a metallic material, it can be brazed to the upper surface of the top plate 211a. If the support member 600 contains a metallic material, it can be brazed to the lower surface of the top cover assembly 150. If the support member 600 contains a metallic material, it can be brazed to the lower surface of the lower plate 152.

[0105] If the support 600 contains a metallic material, the support 600 can be integrally formed with the battery module 200.

[0106] The cap 155 can seal the inlet port 154. The interior of the cooling flow path 153 can be filled with coolant CL. The coolant CL can flow along the cooling flow path 153. For example, the coolant CL can be water. The cap 155 can seal the inlet port 154 to prevent coolant CL from leaking through the inlet port 154.

[0107] The injection hole 154 may face the connection hole 611. The hole cover 155 may be disposed between the injection hole 154 and the connection hole 611. The support member 600 may be disposed on the lower surface of the hole cover 155.

[0108] The support member 600 can be fixed between the top cover assembly 150 and the battery module 200. The support member 600 can be fixed between the lower plate 152 and the top plate 211a of the top cover assembly 150. The first portion 610 can be fixed between the hole cover 155 and the top plate 211a of the top cover assembly 150. The first portion 610 can be compressed between the hole cover 155 and the top plate 211a. The support member 600 can support the hole cover 155. The first portion 610 can support the hole cover 155.

[0109] The orifice cap 155 can accept the pressure P from the coolant CL flowing through the cooling flow path 153. The first portion 610 can support the orifice cap 155. The first portion 610 can provide a supporting force S to the orifice cap 155. By supporting the orifice cap 155, the first portion 610 can prevent the orifice cap 155 from sagging or deforming due to the pressure P of the coolant CL. Due to the first portion 610, the orifice cap 155 can stably seal the inlet port 154.

[0110] The injection hole 154 may face the connection hole 611. The hole cover 155 may be disposed between the injection hole 154 and the connection hole 611. The support member 600 may be disposed on the lower surface of the hole cover 155.

[0111] The connecting hole 611 can face the inlet hole 211b. The connecting hole 611 can communicate with the inlet hole 211b. The connecting hole 611 can have substantially the same dimensions as the inlet hole 211b. The diameter of the connecting hole 611 can be substantially the same as the diameter of the inlet hole 211b.

[0112] The connecting hole 611 can have substantially the same dimensions as the injection hole 154. The diameter of the connecting hole 611 can also be substantially the same as the diameter of the injection hole 154. Therefore, in the event of a thermal event, the hole cap 155 can easily melt or rupture. Due to the melting or rupture of the hole cap 155, the injection hole 154, the connecting hole 611, and the inlet hole 211b can become connected. Coolant CL can be introduced into the battery module 200 through the injection hole 154, the connecting hole 611, and the inlet hole 211b. Therefore, the battery cell 220 in which a thermal event has occurred can be rapidly cooled. Alternatively, the battery cell 220 in which a fire has occurred can be rapidly extinguished.

[0113] The heat transfer component 800 may be located between the battery module 200 and the top cover assembly 150. The heat transfer component 800 may contact, be connected to, or be attached to the battery module 200. The heat transfer component 800 may contact, be connected to, or be attached to the top cover assembly 150.

[0114] A heat transfer member 800 may be disposed between the top plate 211a and the lower plate 152. The heat transfer member 800 may contact, be connected to, or be attached to the top plate 211a. The heat transfer member 800 may contact, be connected to, or be attached to the lower plate 152. The heat transfer member 800 may be disposed in the opening 601. For example, the heat transfer member 800 may be resin. A first portion 610 and a second portion 620 may limit the filling range of the heat transfer member 800. The heat transfer member 800 may be surrounded by the first portion 610 and the second portion 620. Heat generated from the battery module 200 may be transferred to the top cover assembly 150 through the heat transfer member 800.

[0115] The peripheral portion 154a of the injection port 154 may have a curved surface. Because the peripheral portion 154a has a curved surface, flow friction can be reduced when coolant CL passes through the injection port 154. As a result, the pressure applied to the port cover 155 can be reduced, and deformation or damage to the port cover 155 can be minimized.

[0116] The diameter of the inlet hole 154 can increase as it ascends. Because the diameter of the inlet hole 154 increases as it ascends, flow friction is reduced when the coolant CL passes through the inlet hole 154. As a result, the pressure applied to the orifice cap 155 can be reduced, and deformation or damage to the orifice cap 155 can be minimized.

[0117] The peripheral portion 154a of the injection hole 154 may have a rounded corner shape. By rounding the peripheral portion 154a, flow friction can be reduced when the coolant CL passes through the injection hole 154. As a result, the pressure applied to the hole cover 155 can be reduced, and deformation or damage to the hole cover 155 can be minimized.

[0118] The peripheral portion 154a of the injection hole 154 may have a chamfered shape. By chamfering the peripheral portion 154a, flow friction can be reduced when the coolant CL passes through the injection hole 154. As a result, the pressure applied to the hole cover 155 can be reduced, and deformation or damage to the hole cover 155 can be minimized.

[0119] Figure 24 This is a diagram illustrating a vehicle V according to an embodiment of the present disclosure.

[0120] Reference Figure 24The battery pack 1000 according to this disclosure can be applied to a vehicle V, such as an electric vehicle or a hybrid electric vehicle. That is, the vehicle V according to this disclosure may include the battery pack 1000 according to this disclosure. Furthermore, in addition to the battery pack 1000, the vehicle V according to this disclosure may also include various other components included in the vehicle. For example, the vehicle V according to this disclosure may also include a body, a motor, control devices such as an ECU (electronic control unit), etc.

[0121] This disclosure has been described in detail. However, it should be understood that although preferred embodiments of this disclosure have been pointed out, the detailed description and specific examples 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 this detailed description.

Claims

1. A battery pack, the battery pack comprising: Bottom cover assembly; A battery module, the battery module being mounted on the upper surface of the bottom cover assembly; A top cover assembly located on the battery module and having a flow path and an injection port, the flow path being formed in the top cover assembly and the injection port being configured to communicate with the flow path and face the battery module; A cap, which is attached to the lower surface of the top cover assembly and configured to seal the injection port; as well as A support member is fixed between the hole cover and the battery module and is configured to support the hole cover.

2. The battery pack according to claim 1, in, The cover has a sheet shape.

3. The battery pack according to claim 1, in, The support component comprises an elastic material.

4. The battery pack according to claim 3, in, The support is compressed between the hole cover and the battery module.

5. The battery pack according to claim 1, in, The support component is made of metal.

6. The battery pack according to claim 1, in, The battery module includes: Module housing, the module housing providing space within the module housing and having a top plate; and The battery cell is located inside the module housing. The support member is connected to the upper surface of the top plate.

7. The battery pack according to claim 6, in, The support member and the top plate are integrally formed.

8. The battery pack according to claim 1, in, The support member has a connection hole facing the cover.

9. The battery pack according to claim 8, in, The injection port and the connection port are configured to communicate with each other in the event of a thermal event.

10. The battery pack according to claim 8, in, The battery module includes: Module housing, the module housing providing space within the module housing and having a top plate; and The battery cell is located inside the module housing. The top plate has an inlet hole configured to communicate with the injection hole.

11. The battery pack according to claim 1, in, The injection hole includes a portion whose diameter increases as it ascends.

12. The battery pack according to claim 1, in, The top cover assembly includes: Lower plate, the lower plate having an injection hole formed therein; and The upper plate is disposed on the lower plate. The area between the injection hole and the upper surface of the lower plate is rounded or chamfered.

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

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