Battery pack

Abstract

A battery pack is disclosed. A battery pack according to an embodiment of the present invention may comprise: a case providing an internal space and having a pack cover; a battery module located inside the case; a module cover between the battery module and the pack cover and spaced apart from the pack cover; and a coupling member that fixes the inner cover and the battery pack cover.

Description

Technical Field

[0001] This disclosure relates to battery packs.

[0002] This application claims priority to Korean Patent Application No. 10-2024-0060522, filed in Korea on May 8, 2024, the disclosure of which is incorporated herein by reference. Background Technology

[0003] With the surge in demand for portable electronic devices such as smartphones, tablets, and smartwatches, and the increasing popularity of electric vehicles, research is actively underway on batteries installed in these vehicles, particularly rechargeable 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 batteries, lithium rechargeable batteries have almost no memory effect or no memory effect at all. Therefore, due to their advantages of being able to be recharged at any time, having a very low self-discharge rate, and high energy density, they have received more attention than nickel-based rechargeable batteries.

[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 and a sealed package or battery casing containing the electrode assembly and electrolyte solution. 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.

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

[0007] Recently, rechargeable batteries have been widely used in medium to large-sized devices such as electric vehicles and energy storage systems (ESS), as well as small devices such as portable electronic devices, to power and store energy. Multiple rechargeable batteries can be electrically connected and stored inside a module housing, thereby forming a battery module. In this case, each rechargeable battery included in a battery module can be referred to as a battery cell. Furthermore, multiple battery modules can be connected to each other to form a battery pack.

[0008] However, if a battery pack includes multiple battery modules, and each battery module includes multiple battery cells, as described above, the battery pack may be susceptible to thermal cascading effects between battery modules or battery cells. For example, if an event such as thermal runaway occurs within one battery module, it is necessary to prevent the thermal runaway from propagating to other battery modules or other battery cells. If the propagation of thermal runaway between battery modules or battery cells is not properly prevented, an event occurring in a particular battery module or battery cell may trigger a thermal cascading effect in other battery modules or battery cells, which could lead to or escalate an explosion or fire.

[0009] Specifically, when an event such as thermal runaway occurs in a battery module, gas or flame may be randomly emitted to the outside. If the emission of gas or flame is not properly controlled, it may be emitted 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 configurations such as module busbars for electrical connection to other battery modules or battery packs. Therefore, if flame is emitted towards 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 the battery module, if flame is emitted towards the front side of a particular battery module, the emitted flame may be directed towards other battery modules, potentially leading to the spread of fire between battery modules.

[0010] Failure to properly control heat transfer between battery modules or cells can lead to sudden voltage drops within the battery module or battery pack. This can cause devices equipped with battery modules or battery packs 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 in operation, there will be no time to move the electric vehicle to a safe location.

[0011] Furthermore, if a fire or explosion suddenly occurs due to failure to properly control heat transfer between battery modules or cells, it could potentially cause injury or death to users. For example, if thermal runaway occurs in an electric vehicle, occupants may not be able to escape safely if sufficient time is not guaranteed before it develops into a full-blown fire. Summary of the Invention

[0012] Technical issues

[0013] Therefore, this disclosure aims to solve the problems of the prior art, and thus, this disclosure aims to provide a battery pack with an improved structure to properly control the emissions of flames, etc. generated inside the battery module, and a vehicle including the battery pack.

[0014] In addition, this disclosure aims to provide a structure that facilitates the expansion of the internal space of the battery pack in the event of a thermal event.

[0015] In addition, this disclosure aims to provide a structure that allows the battery pack cover to easily bulge in the event of a thermal event.

[0016] In addition, 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 that provides an interior space and has a battery pack cover; a battery module located inside the housing; a module cover located between and spaced apart from the battery pack cover; and a fastening member configured to secure the interior cover and the battery pack cover.

[0020] The battery pack may also include a spacer located between the inner cover and the battery pack cover.

[0021] In addition, fastening components can penetrate the spacers.

[0022] Additionally, the battery module may include: a module housing that provides internal space and has vents facing the module cover; and a battery cell located inside the module housing.

[0023] Additionally, the module cover may have an exhaust port facing the vent.

[0024] In addition, there can be multiple exhaust ports, and multiple discharge holes can be provided so that they correspond to each other in a one-to-one relationship.

[0025] Additionally, the battery pack may include a vent cover located between the module cover and the battery pack cover and covering the vent hole.

[0026] Alternatively, the vent cover can be located between the module cover and the spacer.

[0027] Additionally, the exhaust cap may have serrations facing the exhaust port.

[0028] Additionally, the module cover may include: a top cover that covers the upper surface of the battery module; and a side cover that extends from the top cover and covers the side surface of the battery module.

[0029] Additionally, the module cover can be configured to move outward from the battery module in the event of a thermal event.

[0030] In another aspect of this disclosure, a vehicle is also provided that includes a battery pack according to this disclosure.

[0031] Beneficial effects

[0032] According to at least one embodiment of this disclosure, when gas or flame is generated inside the battery module, the discharge of gas or flame can be appropriately controlled.

[0033] According to at least one embodiment of this disclosure, the electrical safety of the battery pack can be improved.

[0034] According to at least one embodiment of this disclosure, when a thermal event occurs, the internal space of the battery pack expands, thereby preventing the battery pack from exploding.

[0035] According to at least one embodiment of this disclosure, heat propagation between battery modules can be suppressed when a thermal event occurs. Attached Figure Description

[0036] 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.

[0037] Figure 1 This is a diagram illustrating a battery pack according to an embodiment of the present disclosure.

[0038] Figure 2 This is an exploded view showing some components of a battery pack according to a first embodiment of the present disclosure.

[0039] Figure 3 It is shown Figure 2 A diagram of the battery module.

[0040] Figure 4 It is shown Figure 3 The diagram shows some of the components of the battery module being disassembled.

[0041] Figure 5 This is an enlarged view showing some components of a battery pack according to a first embodiment of the present disclosure.

[0042] Figure 6 It is along Figure 1 A partial cross-sectional view of the first embodiment, taken by the cutting line A-A'.

[0043] Figure 7 This is a cross-sectional view of the first embodiment taken along the cutting line A-A' during a thermal event.

[0044] Figure 8 This is an exploded view showing some components of a battery pack according to a second embodiment of the present disclosure.

[0045] Figure 9 This is an enlarged view showing some components of a battery pack according to a second embodiment of the present disclosure.

[0046] Figure 10 It is along Figure 1 A partial cross-sectional view of the second embodiment, taken by the cutting line A-A'.

[0047] Figure 11 This is a cross-sectional view of the second embodiment taken along the cutting line A-A' when a thermal event occurs.

[0048] Figure 12 This is an exploded view showing some components of a battery pack according to a third embodiment of the present disclosure.

[0049] Figure 13 This is an enlarged view showing some components of a battery pack according to a third embodiment of the present disclosure.

[0050] Figure 14 It is along Figure 1 A partial cross-sectional view of the third embodiment, taken by the cutting line A-A'.

[0051] Figure 15 This is a cross-sectional view of the third embodiment taken along the cutting line A-A' when a thermal event occurs.

[0052] Figure 16 This is an exploded view showing some components of a battery pack according to a fourth embodiment of the present disclosure.

[0053] Figure 17 This is an enlarged view showing some components of a battery pack according to a fourth embodiment of the present disclosure.

[0054] Figure 18 It is along Figure 1 A partial cross-sectional view of the fourth embodiment, taken by the cutting line A-A'.

[0055] Figure 19 This is a cross-sectional view of the fourth embodiment taken along the cutting line A-A' when a thermal event occurs. 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 and dictionary meanings, but rather interpreted according to the meanings and concepts corresponding to the technical aspects of the present disclosure, based on the principle of allowing the inventors to appropriately define the terminology for the best interpretation.

[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. 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 illustrating a battery pack according to an embodiment of the present disclosure. Figure 2 This is an exploded view showing some components of a battery pack according to a first embodiment of the present disclosure. Figure 3 It is shown Figure 2 The diagram shows the battery module 200. Figure 4 It is shown Figure 3 The diagram shows some of the components of the battery module 200 being disassembled. Figure 5 This is an enlarged view showing some components of a battery pack according to a first embodiment of the present disclosure.

[0059] Reference Figures 1 to 5 The battery pack according to the first embodiment of the present disclosure may include a housing 100, a battery module 200, a module cover 400, and a fastening member 161.

[0060] The housing 100 may include a base plate 110, side walls 120, and a battery pack cover 150. The base plate 110 may have a rectangular shape. The base plate 110 may have a flat shape. The base plate 110 may form the exterior of the battery pack. The base plate 110 may provide internal space for the battery pack.

[0061] Sidewall 120 can be mounted, fastened, connected, fixed, or attached to the upper surface of base plate 110. Sidewall 120 can consist of four components. Sidewall 120 can be arranged along the perimeter of base plate 110. Sidewall 120 can form the appearance of a battery pack. Sidewall 120 can provide internal space.

[0062] The battery pack cover 150 can be in the shape of a rectangular plate. The battery pack cover 150 can be in the shape of a flat plate. The battery pack cover 150 can form the exterior of the battery pack. The battery pack cover 150 can cover the internal space of the battery pack.

[0063] The battery module 200 may include a plurality of battery cells 220. In this case, the battery cell 220 may represent a secondary battery. Specifically, 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 may have various shapes such as cylindrical or cuboid.

[0064] Module cover 400 may be located between battery module 200 and battery pack cover 150. Furthermore, module cover 400 may be spaced apart from battery pack cover 150. The space between battery pack cover 150 and module cover 400 may be referred to as the venting space VS (see [reference]). Figure 6The module cover 400 can cover the upper surface of the battery module 200.

[0065] The fastening member 161 can secure the module cover 400 and the battery pack cover 150. The module cover 400 and the battery pack cover 150 can be relatively fixed by the fastening member 161. Alternatively, the fastening member 161 can connect, fasten or fix the module cover 400 to the battery pack cover 150 while maintaining the space between the module cover 400 and the battery pack cover 150.

[0066] According to this configuration, the thermal safety of the battery pack can be improved. In the event of a thermal event, the exhaust gas g can be discharged from the battery module 200. The module cover 400 and the battery pack cover 150 can be moved outward, upward, or along the Z-axis of the battery module 200 by the pressure of the exhaust gas g. This prevents a rapid increase in internal pressure of the battery pack.

[0067] Furthermore, according to this configuration, the venting space VS between the module cover 400 and the battery pack cover 150 can be used as a path for the exhaust gas g. This ensures a stable path for the exhaust gas g.

[0068] Furthermore, according to this configuration of the present disclosure, the module cover 400 can prevent exhaust gases g generated outside the battery module 200 from flowing into the battery module 200. As a result, the propagation of thermal events can be prevented.

[0069] Reference Figures 1 to 5 The battery pack according to the first embodiment of this disclosure may include a spacer 162 located between the module cover 400 and the battery pack cover 150. The spacer 162 may keep the module cover 400 and the battery pack cover 150 spaced apart.

[0070] The spacer 162 can be fastened, connected, fixed, or attached to the upper surface of the module cover 400. Alternatively, the spacer 162 can be integrally formed with the module cover 400.

[0071] Alternatively, spacer 162 may be fastened, connected, secured, or attached to the lower surface of battery pack cover 150. Alternatively, spacer 162 may be integrally formed with battery pack cover 150.

[0072] According to this configuration, the thermal safety of the battery pack can be improved. The venting space VS can be stably fixed by the spacer 162.

[0073] Reference Figures 1 to 5 The battery pack according to the first embodiment of the present disclosure may include a partition wall and an exhaust device 600.

[0074] The partition wall 300 may include a first partition wall 310 and a second partition wall 320. Multiple partition walls 300 may be provided. The partition wall 300 may be mounted, fastened, fixed, connected, or attached to the upper surface of the base plate 110. The partition wall 300 may divide the internal space of the battery pack. The battery module 200 or battery cell 220 may be located in the space divided by the partition wall 300.

[0075] The exhaust device 600 can be mounted on the side wall 120. For example, the exhaust device 600 can be mounted on the front side of the side wall 120. For example, the exhaust device 600 can be a valve. The exhaust device 600 can open to release gas when the pressure inside the housing 100 increases. In addition, the exhaust device 600 can prevent outside air from flowing into the housing 100. Multiple exhaust devices 600 can be provided.

[0076] Reference Figures 1 to 5 The battery pack according to the first embodiment of this disclosure may include a plurality of battery modules 200. The battery module 200 may include a module housing 210, a plurality of battery cells 220, a gasket 250, a busbar frame assembly 230, and an end cap 240.

[0077] The module housing 210 may have a cuboid shape. The module housing 210 may also be referred to as a frame 210. The module housing 210 may provide space therein. The module housing 210 may have a top plate, a bottom plate, and a pair of side plates. Additionally, the module housing 210 may have openings on its front and rear surfaces.

[0078] The module housing 210 may have vents 211 in its top plate. The vents 211 may connect the interior and exterior of the module housing 210. Furthermore, the vents 211 may face the module cover 400. Multiple vents 211 may be provided. Multiple vents 211 may face the module cover 400.

[0079] Battery cells 220 can be housed inside module housing 210. Multiple battery cells 220 can be stacked along a left-right direction or a Y-axis direction. Each battery cell 220 may include a receiving portion 221 for accommodating electrode assemblies, a first sealing portion 222 projecting forward and backward from the receiving portion 221, and a second sealing portion 223 projecting upward from the receiving portion 221. Additionally, each battery cell 220 may include electrode leads 224 projecting forward and backward from the first sealing portion 222, respectively. Each battery cell 220 can extend along a front-back direction or an X-axis direction. Electrode leads 121 can project forward and backward from each battery cell 220.

[0080] The pad 250 can be disposed between a plurality of battery cells 220. The pad 250 can be arranged between at least some of the battery cells 220 and / or at the periphery of the stack. For example, the pad 250 can be configured to be arranged between every four battery cells 220 stacked in a left-right direction.

[0081] The liner 250 may contain an elastic material to absorb any swelling 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 a heat-insulating or flame-retardant material, such as silicone or mica.

[0082] The busbar frame assembly 230 can be disposed on the front and rear sides of the plurality of battery cells 220 respectively. The busbar frame assembly 230 can be electrically connected to the electrode leads 121 of the plurality of battery cells 220.

[0083] A pair of end caps 240 can be attached to the front and rear sides of the module housing 210, respectively. The pair of end caps 240 can cover the front and rear surfaces of the module housing 210. The end caps 240 can have a rectangular shape.

[0084] The battery module 200 can be mounted, fastened, connected, fixed, or attached to the upper surface of the base plate 110. In the event of a thermal event from the battery module 200, exhaust gas g can be discharged through the vent 211. The vent 211 can face the inner surface of the battery pack cover 150. The exhaust gas g discharged through the vent 211 can push the battery pack cover 150 outward, upward, or in the Z-axis direction. The battery module 200 can be located within the space defined by the partition wall 300.

[0085] According to this configuration, the thermal safety of the battery pack can be improved. In the event of a thermal event, the exhaust gas g passing through the vent 211 can pressurize the module cover 400. As a result, the module cover 400 and the battery pack cover 150 can move upward or in the +Z axis direction, and a sudden increase in pressure inside the battery pack can be prevented.

[0086] Reference Figures 1 to 5According to a first embodiment of the present disclosure, the module cover 400 of the battery pack may include a top cover 410 and side covers 420. The top cover 410 may cover the top plate of the battery module 200. The top cover 410 may have a plate shape. The side covers 420 may extend downward from the top cover 410 or in the -Z axis direction. The side covers 420 may have a plate shape. The side covers 420 may cover the side plates or side surfaces of the battery module 200. The side covers 420 may be arranged in pairs. A pair of side covers 420 may respectively cover a pair of side plates of the battery module 200. The side covers 420 and the top cover 410 may be integrally formed. The side covers 420 may be located between the first partition wall 310 and the battery module 200.

[0087] The module cover 400 may be made of a metallic material. For example, the module cover 400 may be made of stainless steel or aluminum. Additionally, the module cover 400 may have a thin thickness. For example, the module cover 400 may have a thickness of 1 mm.

[0088] According to this configuration of the present disclosure, in the event of a thermal event, the module cover 400 can move stably upwards or in the +Z axis direction. The side cover 420 can guide the movement of the module cover 400.

[0089] Furthermore, according to this configuration of the present disclosure, the module cover 400 can be arranged to completely surround the battery module 200 due to the side cover 420. Thus, the module cover 400 can more reliably prevent exhaust gases g generated outside the battery module 200 from flowing into the battery module 200.

[0090] Figure 6 It is along Figure 1 A partial cross-sectional view of the first embodiment, taken by the cutting line A-A'. Figure 7 This is a cross-sectional view of the first embodiment taken along the cutting line A-A' when a thermal event occurs.

[0091] Reference Figures 1 to 7 According to the first embodiment of this disclosure, the fastening member 161 of the battery pack can penetrate the spacer 162. Additionally, the fastening member 161 can penetrate the battery pack cover 150, the spacer 162, and the module cover 400. Furthermore, the fastening member 161 can penetrate the fastening holes 151 and 401. For example, the fastening member 161 can be a bolt. Additionally, the fastening member 161 can be connected to a nut 163. In this case, the nut 163 can be located between the module cover 400 and the battery module 200. The fastening member 161 and the nut 163 can fasten, connect, or secure the battery pack cover 150, the spacer 162, and the module cover 400.

[0092] According to this configuration, the thermal safety of the battery pack can be improved. Because the module cover 400, spacer 162, and battery pack cover 150 are stably connected, the venting space VS can be reliably ensured even if the pressure inside the housing 100 increases due to a thermal event.

[0093] Reference Figure 7 When a thermal event occurs in the battery module 200a of the battery pack according to the first embodiment of this disclosure, the module cover 400 can move to the outside or top of the battery module 200a. Exhaust gas g can be discharged between the side cover 420 and the first partition wall 310. Furthermore, the exhaust gas g can be discharged toward the end cover 240 of the battery module 200a. The discharged exhaust gas g can move along the exhaust space VS. At this time, the module cover 400 can prevent the exhaust gas g from flowing into the adjacent battery module 200b. The exhaust gas g can be discharged to the outside of the battery pack through the exhaust device 600.

[0094] The features that differ from the embodiments described above will be described in detail below.

[0095] Figure 8 This is an exploded view showing some components of a battery pack according to a second embodiment of the present disclosure. Figure 9 This is an enlarged view showing some components of a battery pack according to a second embodiment of the present disclosure. Figure 10 It is along Figure 1 A partial cross-sectional view of the second embodiment, taken by the cutting line A-A'. Figure 11 This is a cross-sectional view of the second embodiment taken along the cutting line A-A' when a thermal event occurs.

[0096] Reference Figures 8 to 11 According to the second embodiment of this disclosure, the module cover 400 of the battery pack may have a discharge port 411 facing the vent port 211. Furthermore, the discharge port 411 may have a larger size than the vent port 211. The discharge port 411 may face multiple vent ports 211.

[0097] According to this configuration of the present disclosure, the thermal safety of the battery module 200 can be improved. Since the module cover 400 has a vent 411, the exhaust gas g can be discharged more easily.

[0098] Figure 12 This is an exploded view showing some components of a battery pack according to a third embodiment of the present disclosure. Figure 13 This is an enlarged view showing some components of a battery pack according to a third embodiment of the present disclosure. Figure 14 It is along Figure 1 A partial cross-sectional view of the third embodiment, taken by the cutting line A-A'. Figure 15This is a cross-sectional view of the third embodiment taken along the cutting line A-A' when a thermal event occurs.

[0099] Reference Figures 12 to 15 The battery pack according to the third embodiment of this disclosure may further include a vent cover 500. The vent cover 500 may be located between the module cover 400 and the battery pack cover 150. Additionally, the vent cover 500 may have a plate shape. The vent cover 500 may cover the top cover 410. Furthermore, the vent cover 500 may cover the vent hole 411.

[0100] The vent cover 500 may contain a material with high fire resistance. Additionally, the vent cover 500 may contain a material with high heat resistance. For example, the vent cover 500 may contain at least one of silicone, mica, or ceramic materials. Furthermore, the vent cover 500 may have a thin thickness. For example, the vent cover 500 may have a thickness of 0.5 mm.

[0101] According to this configuration, the thermal safety of the battery pack can be improved. The vent cap 500 covers the vent hole 411, thereby more reliably preventing the exhaust gas g generated outside the battery module 200 from flowing into the battery module 200.

[0102] Reference Figures 12 to 15 According to the third embodiment of this disclosure, the vent cover 500 of the battery pack can be located between the module cover 400 and the spacer 162. A fastening member 161 can penetrate the vent cover 500. Furthermore, the fastening member 161 can penetrate the fastening holes 151, 401, and 501. For example, the fastening member 161 can be a bolt. The fastening member 161 and the nut 163 can fasten, connect, or secure the battery pack cover 150, the spacer 162, the module cover 400, and the vent cover 500.

[0103] According to this configuration, the thermal safety of the battery pack can be improved. Since the module cover 400, spacer 162, vent cover 500 and battery pack cover 150 are stably connected, the vent space VS can be stably ensured even if the pressure inside the housing 100 increases due to a thermal event.

[0104] Reference Figures 12 to 15 The vent cap 500 of the battery pack according to the third embodiment of this disclosure may include a serrated line 502. The serrated line 502 may face the vent hole 411. Multiple serrated lines 502 may be provided so as to correspond one-to-one with multiple vent holes 411. The serrated line 502 may be referred to using terms including and generally referring to perforated line 502, slotted line 502, cut line 502, shredding line 502, tear line 502, or separation line 502. The serrated line 502 may be configured to be easily separated by pressure applied to the vent cap 500.

[0105] According to this configuration, the thermal safety of the battery pack can be improved. Because the vent cap 500 has serrated lines 502, the exhaust gas g can be released more easily.

[0106] Furthermore, according to this configuration of the present disclosure, the serration line 502 can be separated without the exhaust gas g generated from outside the battery module 200. Therefore, the exhaust cap 500 can more reliably prevent the exhaust gas g generated from outside the battery module 200 from flowing into the battery module 200 by covering the exhaust hole 411.

[0107] Figure 16 This is an exploded view showing some components of a battery pack according to a fourth embodiment of the present disclosure. Figure 17 This is an enlarged view showing some components of a battery pack according to a fourth embodiment of the present disclosure. Figure 18 It is along Figure 1 A partial cross-sectional view of the fourth embodiment, taken by the cutting line A-A'. Figure 19 This is a cross-sectional view of the fourth embodiment taken along the cutting line A-A' when a thermal event occurs.

[0108] Reference Figures 16 to 19 According to the fourth embodiment of this disclosure, the battery pack may have multiple vent holes 211. Furthermore, multiple discharge holes 412 may be provided, corresponding one-to-one with each of the multiple vent holes 211. Each of the multiple discharge holes 412 may face a vent hole 211. Each of the multiple discharge holes 412 may be configured to have a shape substantially the same as the vent hole 211 it faces. For example, the vent holes 211 and discharge holes 412 may have elliptical or circular shapes.

[0109] In addition, multiple scribe lines 503 can be provided. These multiple scribe lines 503 can be configured to correspond one-to-one with multiple discharge holes 412. Each of the multiple scribe lines 503 can face a discharge hole 412.

[0110] According to this configuration, the thermal safety of the battery pack can be improved. Since the vent 211, the discharge port 412, and the scribing line 503 are arranged in alignment, the exhaust gas g can be discharged more easily.

[0111] In addition to the battery module, the battery pack according to this disclosure may also include various components, such as battery pack components known at the time of filing of this application, such as BMS, busbars, relays, current sensors, etc.

[0112] The battery pack according to this disclosure can be used in vehicles such as electric vehicles or hybrid vehicles. That is, a vehicle according to this disclosure can include the battery pack described above. In addition to the battery pack, 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).

[0113] 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 variations 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: The housing provides internal space and has a battery pack cover; A battery module, wherein the battery module is located inside the housing; A module cover, which is located between the battery module and the battery pack cover and is spaced apart from the battery pack cover; as well as A fastening member configured to secure the inner cover and the battery pack cover.

2. The battery pack according to claim 1, further comprising: A spacer is located between the inner cover and the battery pack cover.

3. The battery pack according to claim 2, in, The fastening member passes through the spacer.

4. The battery pack according to claim 1, in, The battery module includes: A module housing, the module housing providing internal space and having vents facing the module cover; and The battery cell is located inside the module housing.

5. The battery pack according to claim 4, in, The module cover has an exhaust port facing the exhaust port.

6. The battery pack according to claim 5, in, The exhaust port is provided with multiple vents, and The discharge port is provided in multiple ways so that it corresponds to the multiple exhaust ports in a one-to-one relationship.

7. The battery pack according to claim 6, further comprising: An exhaust cover is located between the module cover and the battery pack cover and covers the exhaust hole.

8. The battery pack according to claim 7, in, The exhaust cover is located between the module cover and the spacer.

9. The battery pack according to claim 7, in, The exhaust cover has a grooved line facing the exhaust hole.

10. The battery pack according to claim 1, in, The module cover includes: A top cover that covers the upper surface of the battery module; and A side cover that extends from the top cover and covers the side surface of the battery module.

11. The battery pack according to claim 1, in, The module cover is configured to be movable outward from the battery module in the event of a thermal event from the battery module.

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

Images