Battery pack

Abstract

A battery pack is disclosed. A battery pack according to an embodiment of the present invention may comprise: a bottom cover assembly providing a space therein; a battery cell disposed on the bottom cover assembly; a front wall providing a space therein and communicating with the bottom cover assembly; a venting device installed on the front wall; and a rebound device located inside the bottom cover assembly and including a rod extending toward the front wall and a head provided at the front end of the rod.

Description

battery pack

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

[0002] This application is a priority application for Korean Patent Application No. 10-2025-0031996 filed on March 12, 2025, and all contents disclosed in the specification and drawings of said application are incorporated into this application by reference.

[0003] As the demand for portable electronic products such as smartphones, tablet PCs, and smartwatches increases significantly and electric vehicles become increasingly widespread, research on batteries installed in them, particularly secondary batteries capable of repeated charging and discharging, is actively underway.

[0004] Currently commercialized rechargeable batteries include nickel-cadmium, nickel-hydrogen, nickel-zinc, and lithium-ion batteries. Among these, lithium-ion batteries are gaining attention for their advantages, such as the ability to charge and discharge freely with almost no memory effect compared to nickel-based batteries, a very low self-discharge rate, and high energy density.

[0005] These lithium secondary batteries primarily use lithium-based oxides and carbon materials as the positive and negative active materials, respectively. The lithium secondary battery comprises an electrode assembly in which a positive plate and a negative plate, each coated with the positive and negative active materials, are arranged with a separator in between, and an outer casing, namely a battery case, that seals and houses the electrode assembly together with an electrolyte.

[0006] Generally, lithium secondary batteries can be classified according to the shape of the casing into can-type secondary batteries, in which the electrode assembly is embedded in a metal can, and pouch-type secondary batteries, in which the electrode assembly is embedded in a pouch of aluminum laminate sheet.

[0007] Recently, secondary batteries are widely used for driving or energy storage not only in small devices such as portable electronic devices but also in medium-to-large devices such as electric vehicles and Energy Storage Systems (ESS). A single battery module can be formed by housing multiple such secondary batteries together inside a module case while electrically connected. In this case, each secondary battery included in a single battery module can be referred to as a battery cell. Furthermore, multiple such battery modules can be connected to form a single battery pack.

[0008] However, when a battery pack contains multiple battery modules, and each module contains multiple battery cells, it may be vulnerable to thermal chain reactions between modules or cells. For example, if an event such as thermal runaway occurs within a single battery module, it is necessary to suppress the propagation of this runaway to other battery modules or cells. If the propagation of thermal runaway between modules or cells is not properly suppressed, an event originating in a specific module or cell may trigger a chain reaction of thermal reactions in other modules or cells, potentially causing explosions or fires, or significantly amplifying their scale.

[0009] In particular, if an event such as thermal runaway occurs in a single battery module, gases or flames may be randomly released to the outside. If the release of such gases or flames is not properly controlled, they may be released toward other battery modules, potentially causing a thermal chain reaction in those modules. Specifically, module terminals may be located on the front side of a battery module to provide electrical connections to other battery modules or battery packs, such as module busbars. Therefore, if flames are released toward the front of such a battery module, they can damage the module terminals within the battery pack and cause an electrical short circuit. Furthermore, since other battery modules may be located in front of a specific battery module, if flames are released toward the front of that module, the emitted flames may spread toward other modules, making it easy for fire to spread between battery modules.

[0010] If thermal propagation between battery modules or between battery cells is not properly controlled, a rapid voltage drop in the battery module or battery pack may occur. This can lead to a sudden shutdown of the device equipped with the battery module or battery pack, causing unexpected damage. For example, if a sudden voltage drop in the battery pack occurs while an electric vehicle is in operation, there may not be enough time to move the electric vehicle to a safe location.

[0011] Furthermore, if thermal propagation between battery modules or battery cells is not properly controlled and a fire or explosion occurs suddenly, there is a high possibility of causing casualties to users. For example, if thermal runaway occurs in an electric vehicle and a certain amount of time is not secured before it progresses into a full-scale fire, the occupants may not be able to escape safely.

[0012] Therefore, a structure is required that prevents the battery pack structure from collapsing due to thermal events and allows venting gas to be smoothly discharged.

[0013] Accordingly, the present invention is devised to solve the above-mentioned problems and aims to provide a battery pack with an improved structure that can maintain the structure of the battery pack even when a thermal event occurs, and a vehicle including the same.

[0014] Another objective of the present invention may be to provide a structure capable of dispersing high pressure caused by venting gas.

[0015] Another objective of the present invention may be to provide a structure capable of rapidly discharging venting gas.

[0016] However, the technical problems that the present invention aims to solve are not limited to those described above, and other unmentioned problems will be clearly understood by those skilled in the art from the description of the invention below.

[0017] A battery pack according to one embodiment of the present invention for achieving the above-mentioned purpose may include: a bottom cover assembly providing an internal space; a battery cell disposed on top of the bottom cover assembly; a front wall providing an internal space and communicating with the bottom cover assembly; a venting device installed on the front wall; and a rebound device located inside the bottom cover assembly, comprising a rod extending toward the front wall and a head provided at the front end of the rod.

[0018] In addition, the above-mentioned rod may be configured to be movable along the front-rear direction.

[0019] Additionally, the rebound device further includes a first body having a space inside and a guide hole formed along the front-rear direction, and the rod can pass through the guide hole.

[0020] In addition, the head may be configured to be larger than the diameter of the guide hole.

[0021] Additionally, the rebound device may further include a piston located inside the first body and provided at the rear end of the rod.

[0022] In addition, the first body may include a stopper located behind the piston.

[0023] Additionally, the rebound device may further include a spring disposed between the guide hole and the piston.

[0024] In addition, the first body may have a communication hole located behind the piston.

[0025] In addition, the above communication hole can be in communication with the rear surface of the piston.

[0026] Additionally, the rebound device may further include a second body coupled to the first body and guiding flow through the communication hole.

[0027] In addition, the bottom cover assembly may have a venting hole formed on the upper surface.

[0028] In addition, an automobile according to another aspect of the present invention for achieving the above-mentioned purpose includes a battery pack according to the present invention.

[0029] According to at least one of the embodiments of the present invention, the structure of the battery pack can be stably maintained even if a thermal event occurs.

[0030] According to at least one of the embodiments of the present invention, damage to the battery pack due to the high pressure of the venting gas can be prevented.

[0031] According to at least one of the embodiments of the present invention, venting gas can be rapidly discharged.

[0032] The following drawings attached to this specification illustrate preferred embodiments of the present invention and serve to further enhance understanding of the technical concept of the present invention together with the detailed description of the invention provided below; therefore, the present invention should not be interpreted as being limited only to the matters described in such drawings.

[0033] FIG. 1 is a drawing showing a battery pack according to one embodiment of the present invention.

[0034] Figure 2 is a diagram showing a partial configuration of the battery pack of Figure 1 separated.

[0035] Figure 3 is a drawing showing the top cover assembly of Figure 2.

[0036] Figure 4 is a diagram showing a partial configuration of the top cover assembly of Figure 3 separated.

[0037] Figure 5 is a drawing showing the battery module of Figure 2.

[0038] Figure 6 is a diagram showing a partial configuration of the battery module of Figure 5 separated.

[0039] Figure 7 is a diagram showing a part of the configuration of the battery pack of Figure 2.

[0040] Figure 8 is a diagram showing a partial configuration of the battery pack of Figure 7 separated.

[0041] Figure 9 is a drawing showing the rebound device of Figure 8.

[0042] FIG. 10 is a diagram showing a partial configuration of the rebound device of FIG. 9 separated.

[0043] FIG. 11 is an enlarged view of the cross-sectional configuration along the cutting line A-A' of FIG. 7.

[0044] Figures 12 and 13 are diagrams showing the change in Figure 11 when a thermal event occurs.

[0045] FIG. 14 is an enlarged view of the cross-sectional configuration along the cutting line A-A' of FIG. 7.

[0046] FIG. 15 is a drawing showing a vehicle according to one aspect of the present invention.

[0047] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, terms and words used in this specification and claims should not be interpreted as being limited to their ordinary or dictionary meanings, and should be interpreted in a meaning and concept consistent with the technical spirit of the present invention, based on the principle that the inventor can appropriately define the concept of the terms to best describe his invention.

[0048] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely examples of the present invention and do not represent all aspects of the technical concept of the present invention; thus, it should be understood that various equivalents and modifications that can replace them may exist at the time of filing this application.

[0049] FIG. 1 is a drawing showing a battery pack (1000) according to an embodiment of the present invention. FIG. 2 is a drawing showing a partial configuration of the battery pack (1000) of FIG. 1 separated.

[0050] Referring to FIGS. 1 and 2, a battery pack (1000) according to one embodiment of the present invention may include a case (100). The case (100) may form the exterior of the battery pack (1000). The case (100) may have a rectangular shape. The case (100) may provide a space inside.

[0051] The case (100) may include a bottom cover assembly (110). The bottom cover assembly (110) may have a rectangular shape. The bottom cover assembly (110) may form the exterior of the battery pack (1000). The bottom cover assembly (110) may provide an internal space for the battery pack (1000). The bottom cover assembly (110) may provide an internal space.

[0052] The front wall (120a) may be installed, fastened, joined, fixed, or attached to the bottom cover assembly (110). The front wall (120a) may provide space inside. The front wall (120a) may form the exterior of the battery pack (1000). The front wall (120a) may extend along the left-right direction or the X-axis direction. The front wall (120a) may communicate with the bottom cover assembly (110).

[0053] The rear wall (120b) may be installed, fastened, joined, fixed, or attached to the bottom cover assembly (110). The rear wall (120b) may provide space inside. The rear wall (120b) may form the exterior of the battery pack (1000). The rear wall (120b) may extend along the left-right direction or the X-axis direction. The front wall (120a) and the rear wall (120b) may face each other.

[0054] The side wall (120c) may be installed, fastened, joined, fixed, or attached to the bottom cover assembly (110). The side wall (120c) may provide space inside. The side wall (120c) may form the exterior of the battery pack (1000). The side wall (120c) may extend along the front-rear direction or the Y-axis direction. The side wall (120c) may be provided in a pair. The pair of side walls (120c) may face each other.

[0055] The case (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 be installed, fastened, joined, fixed, or attached to a front wall (120a), a rear wall (120b), or a side wall (120c). The top cover assembly (150) may cover the internal space of the battery pack (1000).

[0056] The battery module (200) may be located inside the case (100). The battery module (200) may be located on top of the bottom cover assembly (110). The battery module (200) may be located below the top cover assembly (150). The battery module (200) may be located between the bottom cover assembly (110) and the top cover assembly (150).

[0057] A plurality of battery modules (200) may be provided. A plurality of battery modules (200) may be arranged along the left-right direction or the X-axis direction. A plurality of battery modules (200) may be arranged along the front-back direction or the Y-axis direction.

[0058] A battery pack (1000) according to one embodiment of the present invention may include an installation beam (300). The installation beam (300) may be provided in multiple numbers. The installation beam (300) may be installed, fastened, fixed, coupled, or attached to the upper surface of a bottom cover assembly (110). The installation beam (300) may partition the internal space of the battery pack (1000). The installation beam (300) may extend along the front-rear direction or the Y-axis direction. A plurality of installation beams (300) may be arranged along the front-rear direction or the Y-axis direction.

[0059] A venting device (500) may be installed on the front wall (120a). For example, the venting device (500) may be a gas valve. The venting device (500) may open to discharge gas when the pressure inside the case (100) increases. Additionally, the venting device (500) may block external air from entering the interior of the case (100). Multiple venting devices (500) may be provided.

[0060] A heat transfer member (600) may be positioned between the top cover assembly (150) and the battery module (200). A heat transfer member (600) may be provided for each battery module (200). For example, the heat transfer member (600) may be made of a material with high thermal conductivity. For example, the heat transfer member (600) may be resin.

[0061] FIG. 3 is a drawing showing the top cover assembly (150) of FIG. 2. FIG. 4 is a drawing showing a partial configuration of the top cover assembly (150) of FIG. 3 separated.

[0062] Referring to FIGS. 3 and 4, the top cover assembly (150) may include a second upper plate (151) and a second lower plate (152). The second upper plate (151) may have a square shape. The second upper plate (151) may form the exterior of the battery pack (1000). The second lower plate (152) may have a square shape. The second lower plate (152) may form the exterior of the battery pack (1000). The second upper plate (151) may be placed on top of the second lower plate (152). The top cover assembly (150) may include a cooling channel (153) inside. The cooling channel (153) may be placed between the second upper plate (151) and the second lower plate (152). A cooling liquid may flow through the cooling channel (153). For example, the cooling liquid may be water. Heat generated from the battery module (200) may be transferred to the cooling liquid of the top cover assembly (150) through the heat transfer member (600).

[0063] FIG. 5 is a drawing showing the battery module (200) of FIG. 2. FIG. 6 is a drawing showing a partial configuration of the battery module (200) of FIG. 5 separated.

[0064] Referring to FIGS. 5 and 6, the battery module (200) may include a battery cell (220). The battery cell (220) may refer to a secondary battery. In particular, the battery cell (220) may be a pouch-type secondary battery. However, the shape of the battery cell (220) is not limited to a pouch shape and may have various shapes such as a cylindrical shape or a rectangular shape.

[0065] The battery cell (220) may be extended along the left-right direction or the X-axis direction. The battery cell (220) may include a storage portion (221) having an electrode assembly, a first sealing portion (222) protruding to the left and right of the storage portion (221), and a second sealing portion (223) protruding downward from the storage portion (221). Additionally, the battery cell (220) may include electrode leads (224) protruding to the left and right of the first sealing portion (222), respectively. The electrode leads (224) may protrude to the left and right of each storage portion (221).

[0066] When a thermal event occurs from the battery module (200), the venting gas (G) may be discharged in a downward direction or in the -Z axis direction. When a thermal event occurs, the second sealing part (223) may rupture and the venting gas (G) may be discharged.

[0067] A plurality of battery cells (220) may be provided. A plurality of battery cells (220) may be stacked along one direction. For example, a plurality of battery cells (220) may be stacked along the front-rear direction or the Y-axis direction.

[0068] The battery module (200) may include a side plate (210). The side plate (210) may be provided as a pair. A pair of side plates (210) may be positioned on the outside of a plurality of battery cells (220). A plurality of battery cells (220) may be positioned between a pair of side plates (210). A side plate (210) may be located at the outermost edge of a plurality of battery cells (220).

[0069] The battery module (200) may include a busbar frame assembly (230). The busbar frame assembly (230) may be provided in pairs. The busbar frame assembly (230) may be electrically connected to a plurality of battery cells (220). The busbar frame assembly (230) may be electrically connected to the electrode leads (224) of the plurality of battery cells (220).

[0070] A busbar frame assembly (230) may be provided on the left and right sides of a plurality of battery cells (220), respectively. The left busbar frame assembly (230) may be electrically connected to the left electrode lead (224) of the plurality of battery cells (220). The right busbar frame assembly (230) may be electrically connected to the right electrode lead (224) of the plurality of battery cells (220).

[0071] The busbar frame assembly (230) may include a frame (231). The frame (231) may include a material having electrical insulation properties. For example, the frame (231) may include a plastic material.

[0072] The busbar (232) can be installed on the frame (231). The busbar (232) may be provided in multiple numbers. The multiple busbars (232) may be arranged along the front-rear direction or the Y-axis direction. The electrode lead (224) may be electrically connected to the busbar (232).

[0073] A terminal busbar (233) may be positioned on the outside of a busbar (232). A terminal busbar (233) may be provided in a pair. Multiple busbars (232) may be positioned between a pair of terminal busbars (233). A terminal busbar (233) may be located at the outermost edge of multiple busbars (232).

[0074] The battery cell (220) may be located on top of the bottom cover assembly (110). The battery cell (220) may be located below the top cover assembly (150). The battery cell (220) may be located between the bottom cover assembly (110) and the top cover assembly (150).

[0075] FIG. 7 is a drawing showing a partial configuration of the battery pack (1000) of FIG. 2. FIG. 8 is a drawing showing a partial configuration of the battery pack (1000) of FIG. 7 separated.

[0076] Referring to FIGS. 7 and 8, the bottom cover assembly (110) may include a first upper plate (111) and a first lower plate (118). The first upper plate (111) may have a square shape. The first upper plate (111) may form the exterior of the battery pack (1000). The first lower plate (118) may have a square shape. The first lower plate (118) may form the exterior of the battery pack (1000). The first upper plate (111) may be placed on top of the first lower plate (118).

[0077] The bottom cover assembly (110) may include a discharge channel (112) inside. A discharge channel (112) may be formed between the first upper plate (111) and the first lower plate (118). The first upper plate (111) may have a first venting hole (114). The first venting hole (114) may be in communication with the discharge channel (112). The first venting hole (114) may be provided in multiple numbers. The multiple first venting holes (114) may be arranged along the left-right direction or the X-axis direction. The multiple first venting holes (114) may be arranged along the front-rear direction or the Y-axis direction. Venting gas (G) discharged through the first venting hole (114) may flow through the discharge channel (112).

[0078] The first upper plate (111) may be provided with a second venting hole (115). The second venting hole (115) may be in communication with a discharge passage (112). The second venting hole (115) may be in communication with a front wall (120a).

[0079] The rebound device (400) may be located, installed, fastened, coupled, or fixed inside the bottom cover assembly (110). The rebound device (400) may be provided in multiple numbers. The multiple rebound devices (400) may be arranged along the left-right direction or the X-axis direction. The rebound device (400) may be located close to the rear wall (120b).

[0080] FIG. 9 is a drawing showing the rebound device (400) of FIG. 8. FIG. 10 is a drawing showing a partial configuration of the rebound device (400) of FIG. 9 separated. FIG. 11 is an enlarged drawing of the cross-sectional configuration along the cutting line A-A' of FIG. 7.

[0081] Referring to FIGS. 9 to 11, the rebound device (400) may include a first body (420).

[0082] The first body (420) may include a first cover (421). The first cover (421) may provide space inside. The first body (420) may include a base plate (425). The base plate (425) may be located below the first cover (421). The first cover (421) may be fastened, coupled, fixed, or attached to the base plate (425).

[0083] The first body (420) may include a load guide (423). The load guide (423) may be located inside the first cover (421). The load guide (423) may be located on the base plate (425). The load guide (423) may include a guide hole (423a). The guide hole (423a) may be formed along the front-rear direction or the Y-axis direction. The guide hole (423a) may extend toward the front wall (120a). The guide hole (423a) may connect the internal space and the external space of the first body (420). The guide hole (423a) may be provided in multiple numbers. The multiple guide holes (423a) may be arranged along the left-right direction or the X-axis direction.

[0084] The rebound device (400) may include a rod (433). The rod (433) may extend along the front-rear direction or the Y-axis direction. The rod (433) may extend toward the front wall (120a). The rod (433) may pass through the guide hole (423a). The rod (433) may be provided in multiple numbers. The rod (433) may be provided to correspond one-to-one with the guide hole (423a). The rod (433) may be movable along the guide hole (423a). The rod (433) may move along the guide hole (423a) in the front-rear direction or the Y-axis direction.

[0085] The rebound device (400) may include a head (432). The head (432) may be provided at the front end of the rod (433). The head (432) may be connected to a plurality of rods (433). The head (432) and the rod (433) may be formed integrally. The rod (433) may extend from the head (432) in the rearward or -Y-axis direction. The head (432) may be located in front of the first body (420). The head (432) may be configured to be larger than the diameter of the guide hole (423a). By being configured to be larger than the diameter of the guide hole (423a), the head (432) may move along the front-rear direction or the Y-axis direction outside the first body (420).

[0086] The rebound device (400) may include a piston (431). The piston (431) may be provided at the rear end of the rod (433). The piston (431) may be connected to a plurality of rods (433). The piston (431) and the rod (433) may be formed integrally. The rod (433) may extend forward or in the +Y-axis direction from the piston (431). The piston (431) may be located inside the first body (420). The piston (431) may be configured to be larger than the diameter of the guide hole (423a). By being configured to be larger than the diameter of the guide hole (423a), the piston (431) may move along the front-rear direction or the Y-axis direction inside the first body (420).

[0087] The rebound device (400) may include a stopper (424). The stopper (424) may be formed in the first body (420). The stopper (424) may be formed inside the first body (420). The stopper (424) may be located behind the piston (431). The stopper (424) may limit the range of movement of the piston (431).

[0088] The rebound device (400) may include a spring (440). The spring (440) may be positioned behind the guide hole (423a). The spring (440) may be positioned in front of the piston (431). The spring (440) may be positioned between the guide hole (423a) and the piston (431). The spring (440) may provide a restoring force to the piston (431). The spring (440) may provide a restoring force that pushes the piston (431) backward or in the -Y axis direction. The piston (431) may be in contact with the stopper (424) by the spring (440). For example, the spring (440) may be a coil spring (440). The rod (433) may pass through the spring (440). The spring (440) may be provided in multiple numbers. The spring (440) can be provided to correspond one-to-one with the load (433).

[0089] The first cover (421) may be provided with a communication hole (421a). The communication hole (421a) may be in communication with the internal space of the first cover (421). The communication hole (421a) may be located behind the piston (431). The communication hole (421a) may be placed on the upper surface of the first cover (421). The communication hole (421a) may be in communication with the rear surface of the piston (431).

[0090] Venting gas (G) introduced into the interior of the bottom cover assembly (110) can be introduced into the interior of the first cover (421) through the communication hole (421a). Venting gas (G) can push the rear of the piston (431). Venting gas (G) can push the piston (431) forward or in the +Y axis direction.

[0091] The rebound device (400) may include a second body (410). The second body (410) may be positioned on top of the first body (420). The second body (410) may be fastened, coupled, connected, attached, or fixed to the first body (420).

[0092] The second body (410) may include a second cover (413). The second cover (413) may be in communication with the first body (420). The second cover (413) may be in communication with a communication hole (421a). The second cover (413) may have an inlet hole (411). The inlet hole (411) may be formed along the front-rear direction or the Y-axis direction. The inlet hole (411) may extend toward the front wall (120a). The inlet hole (411) may be in communication with the communication hole (421a). The second cover (413) may guide flow into the communication hole (421a). The second cover (413) may guide the venting gas (G) introduced into the inlet hole (411) into the communication hole (421a).

[0093] The second body (410) may include a second guide (412). The second guide (412) may be formed inside the second cover (413). The second guide (412) may be positioned above the communication hole (421a). The second guide (412) may have a curved surface. The second guide (412) may guide flow into the communication hole (421a).

[0094] The first body (420) may include a first guide (422). The first guide (422) may be placed inside the first cover (421). The first guide (422) may be positioned on the base plate (425). The first guide (422) may be placed below the communication hole (421a). The first guide (422) may have a curved surface. The first guide (422) may guide the flow introduced into the communication hole (421a) toward the piston (431).

[0095] Figures 12 and 13 are diagrams showing the change in Figure 11 when a thermal event occurs.

[0096] Referring to FIGS. 11 through 13, venting gas (G) generated from a battery cell (220) or battery module (200) can be introduced into the interior of a bottom cover assembly (110) through a first venting hole (114). The venting gas (G) can flow along a discharge path (112). At this time, the venting gas (G) can flow at a high pressure. A portion of the venting gas (G) can be introduced into the interior of a second body (410) through an inlet hole (411). The venting gas (G) introduced into the interior of the second body (410) can be introduced into the interior of a first body (420) through a communication hole (421a). The venting gas (G) introduced into the interior of the first body (420) can pressurize the rear of a piston (431). The venting gas (G) can push the piston (431) forward or in the +Y-axis direction. The piston (431), rod (433), and head (432) can move forward or in the +Y axis direction. The head (432) can push the venting gas (G) introduced into the exhaust passage (112) forward or in the +Y axis direction. The head (432) can push the venting gas (G) introduced into the exhaust passage (112) toward the front wall (120a). At this time, the spring (440) can be compressed.

[0097] The rebound device (400) can use the pressure of the venting gas (G) to flow the venting gas (G) toward the front wall (120a) or the venting device (500). The rebound device (400) can disperse the high pressure of the venting gas (G). By dispersing the pressure of the venting gas (G), the rebound device (400) can maintain the structure of the battery pack (1000) stably. The rebound device (400) can rapidly discharge the venting gas (G).

[0098] As the pressure of the venting gas (G) decreases, the piston (431), rod (433), and head (432) may move backward or in the -Y axis direction. The spring (440) may provide a restoring force to cause the piston (431) to move backward or in the -Y axis direction.

[0099] FIG. 14 is an enlarged view of the cross-sectional configuration along the cutting line A-A' of FIG. 7.

[0100] Referring to FIG. 14, the first upper plate (111) may be provided with a second venting hole (115). The second venting hole (115) may be in communication with a discharge passage (112). The second venting hole (115) may be in communication with a front wall (120a). The second venting hole (115) may be in communication with a venting device (500) installed on the front wall (120a). Venting gas (G) introduced into the discharge passage (112) may be discharged to the outside of the battery pack (1000) through the second venting hole (115), the front wall (120a), and the venting device (500). A rebound device (400) may guide the venting gas (G) to flow toward the front wall (120a) or the venting device (500).

[0101] The battery pack (1000) according to the present invention may further include various components of a battery pack known at the time of filing the present invention, such as a BMS, a busbar, a relay, a current sensor, etc.

[0102] FIG. 15 is a drawing showing a vehicle (V) according to one aspect of the present invention.

[0103] Referring to FIG. 15, the battery pack (1000) according to the present invention can be applied to a vehicle (V), such as an electric vehicle or a hybrid vehicle. That is, the vehicle (V) according to the present invention may include the battery pack (1000) according to the present invention. In addition, the vehicle (V) according to the present invention may further include various other components included in the vehicle in addition to the battery pack (1000). For example, the vehicle (V) according to the present invention may further include a vehicle body, a motor, an electronic control unit (ECU), and other control devices.

[0104] Meanwhile, although terms indicating directions such as up, down, left, right, front, and back have been used in this specification, these terms are used merely for convenience of explanation, and it is obvious to those skilled in the art that they may vary depending on the location of the object or the position of the observer.

[0105] As described above, although the present invention has been explained by limited embodiments and drawings, the present invention is not limited thereto, and it is obvious that various modifications and variations are possible within the scope of the technical spirit of the present invention and the equivalent scope of the claims described below by those skilled in the art to which the present invention belongs.

Claims

1. A bottom cover assembly providing space inside; A battery cell positioned on top of the above bottom cover assembly; A front wall that provides space internally and communicates with the bottom cover assembly; A venting device installed on the front wall above; and, A battery pack comprising a rebound device located inside the bottom cover assembly, the rebound device comprising a rod extending toward the front wall and a head provided at the front end of the rod.

2. In Paragraph 1, The above load is, A battery pack configured to be movable along the front and rear directions.

3. In Paragraph 1, The above rebound device is, It further includes a first body having a space inside and a guide hole formed along the front-rear direction, and The above load is, A battery pack passing through the above guide hole.

4. In Paragraph 3, The above head is, A battery pack configured to be larger than the diameter of the guide hole above.

5. In Paragraph 3, The above rebound device is, A battery pack further comprising a piston provided at the rear end of the above rod and located inside the first body.

6. In Paragraph 5, The above-mentioned first body is, A battery pack including a stopper located behind the above piston.

7. In Paragraph 5, The above rebound device is, A battery pack further comprising a spring disposed between the guide hole and the piston.

8. In Paragraph 5, The above-mentioned first body is, A battery pack having a communication hole located behind the above-mentioned piston.

9. In Paragraph 8, The above communication hole is, A battery pack communicating with the rear of the above piston.

10. In Paragraph 8, The above rebound device is, A battery pack further comprising a second body coupled to the first body and guiding flow through the communication hole.

11. In Paragraph 1, The above bottom cover assembly is, A battery pack having a venting hole formed on the upper surface.

12. An automobile comprising a battery pack according to any one of claims 1 to 11.

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