Battery pack

Abstract

A battery pack is disclosed. The battery pack according to an embodiment of the present invention may comprise: a base plate; upper plates coupled to an upper surface of the base plate, each upper plate extending along a left-right direction, providing a space therein, and having first inlet holes; battery modules positioned above each upper plate; and inner plates positioned inside respective upper plates, each extending along the left-right direction and partitioning the space provided by the upper plate into a thermal insulation space and a venting space.

Description

battery pack

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

[0002] This application is a priority claim application for Korean Patent Application No. 10-2024-0156376 filed on November 6, 2024, 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 freely charge and discharge 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] Accordingly, the present invention is devised to solve the above-mentioned problems and aims to provide a battery pack with an improved structure capable of appropriately controlling the discharge of flames, etc. generated inside the battery pack, and a vehicle including the same.

[0013] Another objective of the present invention may be to provide a structure capable of smoothly discharging venting gas generated inside a battery pack.

[0014] Another objective of the present invention may be to provide a structure capable of blocking heat transferred to a battery module by venting gas when a thermal event occurs.

[0015] 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.

[0016] A battery pack according to one embodiment of the present invention for achieving the above-mentioned purpose may include: a base plate; an upper plate coupled to the upper surface of the base plate and extending along the left-right direction, providing an internal space and having a first inlet hole; a battery module positioned above the upper plate; and an inner plate positioned inside the upper plate and extending along the left-right direction, dividing the space provided by the upper plate into an insulating space and a venting space.

[0017] Additionally, the inner plate may include: a front inclined portion extending upward from the upper surface of the base plate; a support portion extending rearward from the front inclined portion; and a rear inclined portion extending downward from the support portion and coupled to the upper surface of the base plate.

[0018] In addition, the insulation space may be formed between the rear inclined portion and the upper plate.

[0019] Additionally, the venting space may include: a first venting space formed between the front inclined portion and the upper plate; and a second venting space formed inside the inner plate.

[0020] In addition, the first inlet hole can communicate with the first venting space and the outside of the upper plate.

[0021] In addition, the inner plate may be provided with a second inlet hole that connects the first venting space and the second venting space.

[0022] Additionally, the battery pack may further include a flow guide that is coupled to the upper surface of the base plate and passes through the second inlet hole.

[0023] Additionally, the battery pack may further include a venting device disposed inside the second venting space.

[0024] In addition, the support member may be in contact with the upper plate.

[0025] In addition, a battery pack in which the length of the upper plate and the length of the inner plate are substantially the same.

[0026] Additionally, the battery pack may further include a side plate coupled to one side of the upper plate and one side of the inner plate.

[0027] 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.

[0028] According to at least one of the embodiments of the present invention, venting gas generated inside a battery pack can be easily discharged.

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

[0030] According to at least one of the embodiments of the present invention, the electrical safety of the battery pack can be improved.

[0031] According to at least one of the embodiments of the present invention, heat propagation can be suppressed.

[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 battery module of Figure 2.

[0036] Figure 4 is a drawing showing the battery module of Figure 3 in a different direction.

[0037] Figure 5 is a diagram showing a partial configuration of the battery module of Figure 3 separated.

[0038] Figure 6 is a diagram showing the laminate of Figure 5 separated.

[0039] Figure 7 is a diagram showing the change in Figure 4 when a thermal event occurs.

[0040] Figure 8 is a drawing showing the base assembly of Figure 2.

[0041] Figure 9 is a disassembled drawing of the base assembly of Figure 8.

[0042] Figure 10 is a drawing showing the inner plate of Figure 8.

[0043] FIG. 11 is a drawing showing a partial configuration of the base assembly of FIG. 8 separated.

[0044] FIG. 12 is a drawing showing the cross-sectional configuration along the cutting line B-B' of FIG. 8.

[0045] FIG. 13 is a drawing showing the cross-sectional configuration along the cutting line A-A' of FIG. 1.

[0046] FIG. 14 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 space inside. The case (100) may include a pack cover (150). The pack cover (150) may have a rectangular plate shape. A battery module (200) may be located inside the case (100). A plurality of battery modules (200) may be provided.

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

[0052] The case (100) may include side walls (120). The side walls (120) may be installed, fastened, joined, fixed, or attached to the upper surface of the base assembly (110). The side walls (120) may consist of four. The side walls (120) may be arranged along the perimeter of the base assembly (110). The side walls (120) may form the exterior of the battery pack (1000). The side walls (120) may provide an internal space.

[0053] The side wall (120) may be equipped with a connector (610). The connector (610) may output power from the battery pack (1000). Additionally, the connector (610) may charge power to the battery pack (1000). Multiple connectors (610) may be provided.

[0054] The side wall (120) may be provided with a port (620). The port (620) may function as a passage for the inflow or outflow of a cooling fluid (CM). Multiple ports (620) may be provided.

[0055] The BMS (700, battery management system) can be located inside the case. The BMS (700) can control the charging and discharging of the battery module. The BMS (700) can obtain status information of the battery module.

[0056] The pack cover (150) can be installed, fastened, joined, fixed, or attached to the side wall (120). The pack cover (150) can cover the internal space of the battery pack (1000).

[0057] The battery pack (1000) may include a venting device (500). The venting device (500) may be installed in the base assembly (110). 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 case (100). Multiple venting devices (500) may be provided.

[0058] The battery pack (1000) may include a partition wall (300). The partition wall (300) may include a first partition wall (310) and a second partition wall (320). The partition wall (300) may be provided in multiple numbers. The partition wall (300) may be installed, fastened, fixed, coupled, or attached to the upper surface of the base assembly (110). The partition wall (300) may partition the internal space of the battery pack (1000). The battery module (200) may be located in the space partitioned by the partition wall (300).

[0059] FIG. 3 is a drawing showing the battery module (200) of FIG. 2. FIG. 4 is a drawing showing the battery module (200) of FIG. 3 in a different direction. FIG. 5 is a drawing showing a part of the battery module (200) of FIG. 3 separated. FIG. 6 is a drawing showing the laminate (201) of FIG. 5 separated. FIG. 7 is a drawing showing the change of FIG. 4 when a thermal event occurs.

[0060] Referring to FIGS. 3 through 7, the battery module (200) may include a bottom cover (211). The bottom cover (211) may be provided as a pair. The pair of bottom covers (211) may be arranged along the front-rear direction or the X-axis direction. The bottom cover (211) may form the exterior of the battery module (200). The bottom cover (211) may have a flat shape.

[0061] A venting cover (212) may be positioned between a pair of bottom covers (211). The venting cover (212) may be fastened, coupled, fixed, or attached to a pair of bottom covers (211). The venting cover (212) may cover the space between a pair of bottom covers (211). The venting cover (212) may form the exterior of a battery module (200). The venting cover (212) may include a material with high heat resistance. The venting cover (212) may include a material with high fire resistance. The venting cover (212) may include a material with high thermal insulation. For example, the venting cover (212) may include a mica material.

[0062] 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.

[0063] The battery cell (220) may be extended along the front-rear 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 toward the front and rear sides 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 toward the front and rear sides of the first sealing portion (222), respectively. The electrode leads (224) may protrude toward the front and rear sides of each storage portion (221).

[0064] A plurality of battery cells (220) may be provided. A plurality of battery cells (220) may be located on top of a bottom cover (211). A plurality of battery cells (220) may be located on top of a venting cover (212). A plurality of battery cells (220) may form a laminate (201).

[0065] Multiple battery cells (220) can be stacked along one direction. For example, multiple battery cells (220) can be stacked along the left-right direction or the Y-axis direction.

[0066] When a thermal event occurs, venting gas (G) may be discharged from the battery cell (220). The venting gas (G) may be discharged through the second sealing part (223).

[0067] The battery module (200) may include a cartridge (270). The cartridge (270) may be mounted, coupled, fastened, fixed, or received in the first sealing portion (222) of the battery cell (220). A pair of cartridges (270) may be mounted, coupled, fastened, fixed, or received in the front first sealing portion (222) and the rear first sealing portion (222), respectively. A plurality of cartridges (270) may be provided. A pair of cartridges (270) may be provided to correspond one-to-one with a single battery cell (220). A plurality of cartridges (270) may form a laminate (201).

[0068] The battery module (200) may include a cooling plate (240). The cooling plate (240) may have a flow path (241) inside. A cooling fluid (CM) may flow along the flow path (241). The cooling plate (240) may be in contact with, coupled with, fastened to, or fixed to the battery cell (220). The cooling plate (240) may be provided in multiple numbers. The cooling plate (240) may be stacked along one direction. For example, the cooling plate (240) may be stacked along the left-right direction or the Y-axis direction. The cooling plate (240) may be placed between multiple battery cells (220). For example, the cooling plate (240) may be placed every two battery cells (220). Multiple cooling plates (240) may form a stack (201).

[0069] The cooling plate (240) may have a flat plate shape. The cooling plate (240) may be provided with an inlet (244) and an outlet (245). A flow path (241) may connect the inlet (244) and the outlet (245). A cooling fluid (CM) may be introduced into the inlet (244) and discharged through the outlet (245).

[0070] The first tube (242) and the second tube (243) may be connected. The first tube (242) may be provided in multiple numbers. The second tube (243) may be provided in multiple numbers. The first tube (242) and the second tube (243) may be arranged alternately. The first tube (242) or the second tube (243) may be connected to the inlet (244) of the cooling plate (240). The first tube (242) or the second tube (243) may be connected to the outlet (245) of the cooling plate (240). The first tube (242) and the second tube (243) may be connected to multiple cooling plates (240).

[0071] A pad (250) may be placed between a plurality of battery cells (220). A plurality of pads (250) may be provided. A pad (250) may be placed between at least some of the battery cells (220) and / or outside the stack (201). For example, a pad (250) may be configured to be placed between every two battery cells (220) stacked in the left-right direction. A plurality of pads (250) may form the stack (201).

[0072] These pads (250) may be provided with an elastic material to absorb swelling of the battery cell (220). For example, the pads (250) may be made of a foam material such as polyurethane. Alternatively, the pads (250) may be provided with a material capable of blocking heat or flames. For example, the pads (250) may be provided with an insulating or fireproof material such as silicone or mica.

[0073] A busbar frame assembly (230) may be provided on the front and rear sides of a plurality of battery cells (220), respectively. The busbar frame assembly (230) may be electrically connected to the electrode leads (224) of the plurality of battery cells (220).

[0074] The front busbar frame assembly (230) can be electrically connected to the front electrode leads (224) of a plurality of battery cells (220). The front busbar frame assembly (230) can cover the front of the cooling plate (240). The front busbar frame assembly (230) can cover the front of the pad (250). The front busbar frame assembly (230) can cover the front of the cartridge (270).

[0075] The rear busbar frame assembly (230) can be electrically connected to the rear electrode leads (224) of a plurality of battery cells (220). The rear busbar frame assembly (230) can cover the rear of the cooling plate (240). The rear busbar frame assembly (230) can cover the rear of the pad (250). The rear busbar frame assembly (230) can cover the rear of the cartridge (270).

[0076] A pair of end covers (280) can cover the front and rear sides of the busbar frame assembly (230), respectively. The end covers (280) can have a rectangular shape. A pair of end covers (280) can form the exterior of the battery module (200).

[0077] The front end cover (280) can be fastened, coupled, assembled, or fixed to the front bottom cover (211). The rear end cover (280) can be fastened, coupled, assembled, or fixed to the rear bottom cover (211).

[0078] The control unit (290) may be fastened, coupled, assembled, or fixed to the front end cover (280). The control unit (290) may be provided on the outer surface of the front end cover (280) or on the front surface of the front end cover (280). The control unit (290) may be electrically connected to a plurality of battery cells (220). The control unit (290) may control the charging and discharging of the plurality of battery cells (220). The control unit (290) may obtain status information of the plurality of battery cells (220).

[0079] Side covers (213) may be provided in pairs. Side covers (213) may have a flat shape. Side covers (213) may have a square shape. A pair of side covers (213) may each cover both sides of the laminate (201). Side covers (213) may be fastened, coupled, assembled, or fixed to end covers (280). Side covers (213) may be fastened, coupled, assembled, or fixed to bottom covers (211). Side covers (213) may be fastened, coupled, assembled, or fixed to venting covers (212). A pair of side covers (213) may form the exterior of the battery module (200).

[0080] The top cover (215) may be positioned on top of the laminate (201). The top cover (215) may cover the upper surface of the laminate (201). The top cover (215) may have a flat shape. The top cover (215) may have a square shape. The top cover (215) may form the exterior of the battery module (200). The top cover (215) may be fastened, coupled, assembled, or fixed to the side cover (213). The top cover (215) may be fastened, coupled, assembled, or fixed to the end cover (280).

[0081] The top pad (214) may be positioned between the top cover (215) and the laminate (201). The top cover (215) may have a square shape. The top pad (214) may have a flat shape. The top pad (214) may be provided with an elastic material to absorb swelling of the battery cell (220). For example, the top pad (214) may be composed of a foam material such as polyurethane. Alternatively, the top pad (214) may be provided with a material capable of blocking heat or flames. For example, the top pad (214) may be provided with an insulating material or a fire-resistant material such as silicone or mica. The top pad (214) may be compressed between the top cover (215) and the laminate (201).

[0082] The battery module (200) may include a heat transfer member (260). The heat transfer member (260) may include a material with high thermal conductivity. For example, the heat transfer member (260) may be resin.

[0083] The bottom cover (211) may be provided with a plurality of injection holes (211c). A heat transfer member (260) may be introduced into the interior of the battery module (200) through the injection holes (211c). At this time, the heat transfer member (260) may be in a liquid state. The heat transfer member (260) may be in a liquid state at high temperatures. The injected heat transfer member (260) may become a solid state as the temperature decreases.

[0084] A heat transfer member (260) may be placed between the bottom cover (211) and the laminate (201). The heat transfer member (260) may connect the bottom cover (211) and the laminate (201). The heat transfer member (260) may be placed between the bottom cover (211) and a plurality of battery cells (220). The heat transfer member (260) may connect the plurality of battery cells (220) and the bottom cover (211).

[0085] The heat transfer member (260) may not be placed between the venting cover (212) and the laminate (201).

[0086] A heat transfer member (260) may be positioned between the front busbar frame assembly (230) and the front end cover (280). The heat transfer member (260) may connect the front busbar frame assembly (230) and the front end cover (280). The heat transfer member (260) may be positioned between the rear busbar frame assembly (230) and the rear end cover (280). The heat transfer member (260) may connect the rear busbar frame assembly (230) and the rear end cover (280).

[0087] The venting cover (212) may be provided with a separation line (212b). The separation line (212b, score line) may include or be used as a general term for a perforated line (212b, perforated line), a notching line (212b, notching line), a cutting line (212b, cutting line), a shredding line (212b, shredding line), a tear line (212b, tear line), or a separation line (212b, separation line). The separation line (212b) may be configured to be easily separated by pressure applied to the venting cover (212).

[0088] The separation line (212b) may have a rectangular trajectory. The portion of the venting cover (212) surrounded by the separation line (212b) may be referred to as the separation part (212c). The venting section (212a) may include the separation line (212b) and the separation part (212c). The separation line (212b) may be provided in multiple numbers. The multiple separation lines (212b) may be arranged along the left-right direction or the Y-axis direction. The separation part (212c) may be provided in multiple numbers. The multiple separation parts (212c) may be arranged along the left-right direction or the Y-axis direction.

[0089] The separation part (212c) can be separated from the venting cover (212) by pressure applied to the venting cover (212). As a result, a venting hole (212d) can be formed in the venting cover (212).

[0090] The venting portion (212a) may face the second sealing portion (223). When a thermal event occurs, the venting gas (G) may be discharged through the second sealing portion (223). The venting gas (G) may be discharged in a downward direction or in the -Z axis direction. The venting gas (G) may apply pressure to the separation part (212c). The separation part (212c) may be separated by the venting gas (G), and a venting hole (212d) may be formed. The venting gas (G) may be discharged to the outside of the battery module (200) through the venting hole (212d).

[0091] At this time, the venting hole (212d) may be formed only in the separation part (212c) facing the battery cell (220) where the thermal event occurred. The other separation part (212c) may not be separated. The separation part (212c) that is not separated may block the venting gas (G) from flowing into the interior of the battery module (200).

[0092] FIG. 8 is a drawing showing the base assembly (110) of FIG. 2. FIG. 9 is a drawing showing the base assembly (110) of FIG. 8 separated. FIG. 10 is a drawing showing the inner plate (113) of FIG. 8. FIG. 11 is a drawing showing a partial configuration of the base assembly (110) of FIG. 8 separated. FIG. 12 is a drawing showing the cross-sectional configuration along the cutting line B-B' of FIG. 8.

[0093] Referring to FIGS. 8 through 12, the base assembly (110) may include a base plate (111). The base plate (111) may have a flat shape. The base plate (111) may have a square shape. The base plate (111) may form the exterior of the battery pack (1000).

[0094] A venting device (500) may be provided on a base plate (111). A plurality of venting devices (500) may be arranged along the front-rear direction or the X-axis direction. The venting device (500) may discharge venting gas (G) in the downward direction or the -Z-axis direction.

[0095] The upper plate (112) may be fastened, coupled, assembled, fixed, or attached to the upper surface of the base plate (111). The upper plate (112) may provide space inside. The upper plate (112) may be extended along the left-right direction or the Y-axis direction. The upper plate (112) may be provided in multiple numbers. The multiple upper plates (112) may be arranged along the front-rear direction or the X-axis direction. The upper plate (112) may have a shape with both sides open. The upper plate (112) may be provided with multiple first inlet holes (112b3). Venting gas (G) discharged from the battery module (200) may be introduced into the interior of the upper plate (112) through the first inlet holes (112b3). A venting device (500) may be placed inside the upper plate (112). Multiple venting devices (500) may be provided to correspond one-to-one with the upper plate (112).

[0096] The side plates (114) can cover both sides of the upper plate (112). Multiple side plates (114) may be provided. The side plates (114) may be fastened, joined, assembled, fixed, or attached to each side of the upper plate (112).

[0097] An inner plate (113) may be placed inside the upper plate (112). Multiple inner plates (113) may be provided. Multiple inner plates (113) may be provided to correspond one-to-one with the upper plate (112). The inner plate (113) may be fastened, coupled, assembled, fixed, or attached to the upper surface of the base plate (111). The inner plate (113) may provide space inside. The inner plate (113) may be extended along the left-right direction or the Y-axis direction. Multiple inner plates (113) may be provided. Multiple inner plates (113) may be arranged along the front-rear direction or the X-axis direction. A venting device (500) may be placed inside the inner plate (113). Multiple venting devices (500) may be provided to correspond one-to-one with the inner plate (113).

[0098] The inner plate (113) can partition the internal space provided by the upper plate (112). The inner plate (113) can partition the space provided by the upper plate (112) into an insulating space (IS) and a venting space (VS1, VS2).

[0099] The venting space (VS1, VS2) may extend along the left-right direction or the Y-axis direction. The venting space (VS1, VS2) may be a space enclosed by an upper plate (112), an inner plate (113), a base plate (111), and a side plate (114). The venting space (VS1, VS2) may be in communication with the outside of the upper plate (112) through a first inlet hole (112b3). The venting space (VS1, VS2) may accommodate a venting device (500) inside. Venting gas may be discharged to the outside of the battery pack (1000) through the venting space (VS1, VS2).

[0100] The insulating space (IS) may be a space enclosed by an upper plate (112), an inner plate (113), a base plate (111), and a side plate (114). The insulating space (IS) may extend along the left-right direction or the Y-axis direction. The insulating space (IS) may be a sealed space. The insulating space (IS) may block heat transferred from the venting spaces (VS1, VS2). The insulating space (IS) may block heat from being transferred to the battery module (200).

[0101] The inner plate (113) may include a second coupling part (113a). The second coupling part (113a) may be fastened, coupled, assembled, fixed, or attached to the upper surface of the base plate (111). The second coupling part (113a) may be provided on the front side and the rear side of the inner plate (113), respectively. The second coupling part (113a) may extend along the left-right direction or the Y-axis direction. The left end of the rear second coupling part (113a) may be connected, coupled, fastened, fixed, or attached to the left side plate (114). The right end of the rear second coupling part (113a) may be connected, coupled, fastened, fixed, or attached to the right side plate (114).

[0102] The inner plate (113) may include a second protrusion (113b). The second protrusion (113b) may connect a pair of second coupling parts (113a). The second protrusion (113b) may extend rearward from the front second coupling part (113a). The second protrusion (113b) may extend forward from the rear second coupling part (113a). The second protrusion (113b) may provide space inside. The second protrusion (113b) may accommodate a venting device (500).

[0103] The second protrusion (113b) may include a second support member (113b1). The second support member (113b1) may be spaced apart from the base plate (111). The left end of the second support member (113b1) may be connected, coupled, fastened, fixed, or attached to the left side plate (114). The right end of the second support member (113b1) may be connected, coupled, fastened, fixed, or attached to the right side plate (114).

[0104] The second protrusion (113b) may include a second inclined portion (113b2). The second inclined portion (113b2) may connect the second support portion (113b1) and the second coupling portion (113a). The front second inclined portion (113b2) may have a plurality of second inlet holes (113b3). The second inlet holes (113b3) may be provided on the left and right sides of the front second inclined portion (113b2), respectively. The second inlet holes (113b3) may include an opening formed at the left end of the front second inclined portion (113b2). The second inlet holes (113b3) may include an opening formed at the right end of the front second inclined portion (113b2). The rear second inclined portion (113b2) may have its left end connected, coupled, fastened, fixed, or attached to the left side plate (114). The rear second inclined section (113b2) can have its right end connected, coupled, fastened, fixed, or attached to the right side plate (114).

[0105] The inner plate (113) can be formed integrally. The second connecting part (113a), the second supporting part (113b1), and the second inclined part (113b2) can be formed integrally.

[0106] The insulation space (IS) can be formed between the rear second inclined section (113b2) and the upper plate (112).

[0107] A first venting space (VS1) may be formed between the front second inclined portion (113b2) and the upper plate (112). The internal space of the second protrusion (113b) may be referred to as the second venting space (VS2). The first venting space (VS1) may be connected to the outside of the upper plate (112) through the first inlet hole (112b3). The first venting space (VS1) and the second venting space (VS2) may be connected through the second inlet hole (113b3). A venting device (500) may be placed inside the second venting space (VS2).

[0108] The length of the upper plate (112) in the left-right direction or Y-axis direction may be configured to be substantially the same as the length of the inner plate (113) in the left-right direction or Y-axis direction. The length of the upper plate (112) in the left-right direction or Y-axis direction may be configured to be substantially the same as the length of the second support part (113b1) in the left-right direction or Y-axis direction. The length of the upper plate (112) in the left-right direction or Y-axis direction may be configured to be substantially the same as the length of the second inclined part (113b2) in the left-right direction or Y-axis direction. The length of the upper plate (112) in the left-right direction or Y-axis direction may be configured to be substantially the same as the length of the rear second coupling part (113a) in the left-right direction or Y-axis direction.

[0109] A pair of adjacent upper plates (112-1, 112-2) may have a symmetrical structure. A pair of adjacent inner plates (113-1, 113-2) may have a symmetrical structure.

[0110] The flow guide (115) may be fastened, coupled, assembled, fixed, or attached to the upper surface of the base plate (111). The flow guide (115) may be positioned to pass through the second inlet hole (113b3). The flow guide (115) may guide the venting gas flowing through the first venting space (VS1) to easily flow into the second venting space (VS2). A portion of the flow guide (115) may be located in the first venting space (VS1). A portion of the flow guide (115) may be located in the second venting space (VS2). The flow guide (115) may have a curved shape. Multiple flow guides (115) may be provided. A pair of flow guides (115) may be provided for one inner plate (113). A pair of flow guides (115) may be provided on the left and right sides of the inner plate (113), respectively.

[0111] Venting gas (G) discharged from the battery module (200) can be introduced into the interior of the upper plate (112) through the first inlet hole (112b3). Venting gas (G) introduced into the upper plate (112) can be introduced into the interior of the inner plate (113) through both sides of the inner plate (113). Venting gas (G) introduced into the interior of the inner plate (113) can be discharged to the outside of the battery pack (1000) through the venting device (500). The inner plate (113) can extend the flow path of the venting gas (G). As a result, the venting gas (G) can be discharged at a lowered temperature. Additionally, by extending the flow path, the discharge of particles such as flammable particles can be suppressed.

[0112] FIG. 13 is a diagram showing a cross-sectional configuration along the cutting line A-A' of FIG. 1. Referring to FIG. 13, an insulating space (IS) may be located below the first sealing portion (222) of the battery cell (220). The first sealing portion (222) of the battery cell (220) may be a part that generates a lot of heat. The insulating space (IS) can block heat from the venting space (VS1, VS2) from being transferred to the first sealing portion (222). As a result, the propagation of thermal events can be blocked.

[0113] The insulating space (IS) may be located below the electrode lead (224) of the battery cell (220). The electrode lead (224) of the battery cell (220) may be a part that generates a lot of heat. The insulating space (IS) can block the transfer of heat from the venting spaces (VS1, VS2) to the electrode lead (224). As a result, the propagation of thermal events can be blocked.

[0114] FIG. 14 is a drawing showing a vehicle (V) according to one aspect of the present invention. Referring to FIG. 14, the vehicle (V) according to the present invention may include a battery pack (1000) of the present invention.

[0115] The battery pack (1000) according to the present invention may be applied to a vehicle such as an electric vehicle or a hybrid vehicle. 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.

[0116] 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. Base plate; An upper plate coupled to the upper surface of the base plate and extending along the left-right direction, providing a space inside, and having a first inlet hole; A battery module located on the upper plate above; and, A battery pack comprising an inner plate located inside the upper plate and extending along the left-right direction, which divides the space provided by the upper plate into an insulating space and a venting space.

2. In Paragraph 1, The above inner plate is: A front inclined portion extending upward from the upper surface of the base plate; A support member extending rearward from the above-mentioned front inclined portion; and, A battery pack including a rear inclined portion extending downward from the support portion and coupled to the upper surface of the base plate.

3. In Paragraph 2, The above-mentioned insulation space is, A battery pack formed between the rear inclined portion and the upper plate.

4. In Paragraph 2, The above venting space is: A first venting space formed between the front inclined portion and the upper plate; and, A battery pack including a second venting space formed inside the inner plate.

5. In Paragraph 4, The above-mentioned first inlet hole is, A battery pack that connects the first venting space and the outside of the upper plate.

6. In Paragraph 4, The above inner plate is, A battery pack having a second inlet hole that connects the first venting space and the second venting space.

7. In Paragraph 6, A battery pack further comprising a flow guide coupled to the upper surface of the base plate and passing through the second inlet hole.

8. In Paragraph 4, A battery pack further comprising a venting device disposed inside the second venting space.

9. In Paragraph 2, The above support member is, A battery pack in contact with the upper plate above.

10. In Paragraph 1, A battery pack in which the length of the upper plate and the length of the inner plate are substantially the same.

11. In Paragraph 1, A battery pack further comprising a side plate coupled to one side of the upper plate and one side of the inner plate.

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

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